Bump version to 2.6.1

Introduced by #119

.editorconfig

@@ -0,0 +1,11 @@
+root = true
+
+[*]
+charset = utf-8
+# 2 space indentation
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+# Unix-style newlines with a newline ending every file
+end_of_line = lf
+insert_final_newline = true

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,73 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+ professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at `cotes.chung@gmail.com`. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at <https://www.contributor-covenant.org/version/1/4/code-of-conduct.html>
+
+For answers to common questions about this code of conduct, see
+<https://www.contributor-covenant.org/faq>
+
+[homepage]: https://www.contributor-covenant.org

.github/CONTRIBUTING.md

@@ -2,15 +2,15 @@
 
 I want to thank you for sparing a time to improve this project! Here are some guidelines for contributing：
 
-To ensure that the blog design is not confused, this project do not accept suggestions for design changes, such as colors scheme, fonts, typography, etc. If your request is about enhancement, it is recommended to first submit a `Feature Request` type issue to discuss whether your idea fits the project. 
+To ensure that the blog design is not confused, this project does not accept suggestions for design changes, such as color scheme, fonts, typography, etc. If your request is about an enhancement, it is recommended to first submit a [`Feature Request`](https://github.com/cotes2020/jekyll-theme-chirpy/issues/new?labels=enhancement&template=feature_request.md) issue to discuss whether your idea fits the project. 
 
 Generally, contribute to the project by:
 
-1. Fork this project.
-2. Create a new branch `my-new-freature`(or `fix-a-bug`), then complete the development, commit and push.
-3. Submit a new `Pull Request`.
-
+1. Fork this project on GitHub and clone it locally.
+2. Create a new branch from `master` and give it a descriptive name (e.g., `my-new-feature`, `fix-a-bug`).
+3. After completing the development, commit and push to remote.
+4. Submit a new pull request.
 
 ---
 
-:tada:Your volunteering will make the open source world more beautiful, thanks again!:tada:
+:tada: Your volunteering will make the open source world more beautiful, thanks again! :tada:

.github/ISSUE_TEMPLATE/bug_report.md

@@ -4,36 +4,52 @@ about: Create a report to help us improve
 labels: bug
 ---
 
-<!-- Please make sure you have read the README or Wiki, and your question does not appear in other existing issues (including closed ones). Thanks for your cooperation! Now let's start it. -->
+<!-- NOTE: Please maintain all sections, otherwise the issue will be automatically closed :) -->
 
-**Describe the bug**
+## Checklist
+<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
+- [ ] I have read the [tutorials](https://chirpy.cotes.info/categories/tutorial/) and know the correct effect of the functional design.
+- [ ] There are no similar reports on existing issues (including closed ones).
+- [ ] I found the bug on the latest code of `master` branch.
+
+## Describe the bug
 <!-- A clear and concise description of what the bug is. -->
 
-**To Reproduce**
-<!--
+### To Reproduce
+
 Steps to reproduce the behavior:
+<!--
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
 4. See error
 -->
 
-**Expected behavior**
+### Expected behavior
 <!-- A clear and concise description of what you expected to happen. -->
 
-**Screenshots**
+### Screenshots
 <!-- If applicable, add screenshots to help explain your problem. -->
 
-**Desktop (please complete the following information):**
- - OS: [e.g. iOS]
- - Browser: [e.g. chrome, safari]
- - Version: [e.g. 22]
+### Software
+<!-- Please complete the following information -->
+- Ruby version: <!-- by running: `ruby -v` -->
+- Gem version: <!-- by running: `gem -v`-->
+- Bundler version: <!-- by running: `bundle -v`-->
+- Jekyll version: <!-- by running: `bundle list | grep " jekyll "` -->
 
-**Smartphone (please complete the following information):**
- - Device: [e.g. iPhone6]
- - OS: [e.g. iOS8.1]
- - Browser: [e.g. stock browser, safari]
- - Version: [e.g. 22]
+### Desktop
+<!-- If necessary, uncomment and fill in the following list:
+- OS: [e.g. macOS 10.15.6]
+- Browser: [e.g. Chrome 85.0.4183.83 (64-bit)]
+-->
 
-**Additional context**
+### Smartphone
+<!-- If necessary, uncomment and fill in the following list:
+- Device: [e.g. iPhone 6]
+- OS: [e.g. iOS 13.6.1]
+- Browser: [e.g. Chrome 22]
+-->
+
+### Additional context
 <!-- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -4,18 +4,27 @@ about: Suggest an idea for this project
 labels: enhancement
 ---
 
-<!-- Please make sure your request does not appear in other existing issues (including closed ones). Thanks for your cooperation. Now, I can't wait to listen your idea! -->
+<!-- NOTE: Please maintain all sections, otherwise the issue will be automatically closed :) -->
+
+## Checklist
+<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
+- [ ] I have read the [contributing guidelines](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/CONTRIBUTING.md).
+- [ ] There are no similar request on existing issues (including closed ones).
+- [ ] I have read the [project progress](https://github.com/cotes2020/jekyll-theme-chirpy/projects) and know the current progress of the project.
+- [ ] I was in the `master` branch of the latest code.
 
 
-**Is your feature request related to a problem? Please describe.**
+## Is your feature request related to a problem? Please describe
 <!-- A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] -->
 
-**Describe the solution you'd like**
+
+## Describe the solution you'd like
 <!-- A clear and concise description of what you want to happen. -->
 
-**Describe alternatives you've considered**
+
+## Describe alternatives you've considered
 <!-- A clear and concise description of any alternative solutions or features you've considered. -->
 
 
-**Additional context**
+## Additional context
 <!-- Add any other context or screenshots about the feature request here. -->

.github/ISSUE_TEMPLATE/question.md

@@ -4,54 +4,16 @@ about: Ask what ever you want
 labels: question
 ---
 
-<!-- Please make sure you have read the README or Wiki, and your question does not appear in other existing issues (including closed ones). Thanks for your cooperation. Now, uncomment the relevant part to describe the situation. -->
+<!-- NOTE: Please maintain all sections, otherwise the issue will be automatically closed :) -->
 
-<!-- 
-**Don't understand what the README or Wiki says.**
-Point out the parts that are hard for you to understand. 
--->
+## Checklist
 
-<!-- 
-**Want to complain about my bad days.**
-Don't hesitate to share your story!
--->
+<!-- Please complete the following list of tasks, and then check it by change the "[ ]" to "[x]" -->
 
-<!--
-**Just wanted to say hi to the author.**
-Hi, I'm ..., have a nice day ! 
--->
+- [ ] I have read the [tutorials](https://chirpy.cotes.info/categories/tutorial/) and know the correct effect of the functional design.
+- [ ] There are no similar question on existing issues (including closed ones).
+- [ ] I searched the Internet for related problems, but still couldn't solve it.
+- [ ] My question is based on the latest code of `master` branch.
 
-
-<!-- 
-**Not sure if it's a bug**
-Please try to describe the problem
-
-**To Reproduce**
-
-Steps to reproduce the behavior:
-1. Go to '...'
-2. Click on '....'
-3. Scroll down to '....'
-4. See error
-
-
-**Expected behavior**
-A clear and concise description of what you expected to happen.
-
-**Screenshots**
-If applicable, add screenshots to help explain your problem.
-
-**Desktop (please complete the following information):**
- - OS: [e.g. iOS]
- - Browser: [e.g. chrome, safari]
- - Version: [e.g. 22]
-
-**Smartphone (please complete the following information):**
- - Device: [e.g. iPhone6]
- - OS: [e.g. iOS8.1]
- - Browser: [e.g. stock browser, safari]
- - Version: [e.g. 22]
-
-**Additional context**
-Add any other context about the problem here. 
--->
+## Description
+<!-- Please describe your question in detial. -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,44 @@
+## Description
+
+<!-- 
+Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.
+-->
+
+e.g. Fixes #(issue)
+
+## Type of change
+
+<!-- 
+Please select the desired item checkbox and change it to "[x]", then delete options that are not relevant.
+-->
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+
+## How has this been tested
+
+<!-- 
+Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration
+-->
+
+- [ ] I have run `bash ./tools/test.sh --build` (at the root of the project) locally and passed
+- [ ] I have tested this feature in the browser
+
+### Test Configuration
+
+- Browerser type & version:
+- Operating system:
+- Bundler version:
+- Ruby version:
+- Jekyll version:
+
+### Checklist
+<!-- Select checkboxes by change the "[ ]" to "[x]" -->
+- [ ] My code follows the [Google style guidelines](https://google.github.io/styleguide/)
+- [ ] I have performed a self-review of my own code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] Any dependent changes have been merged and published in downstream modules

.github/workflows/ci.yml

@@ -1,13 +1,13 @@
-name: build
+name: 'Continuous Integration'
 on:
   push:
     branches-ignore:
-      - stable
+      - 'production'
     tags-ignore:
       - '*'
     paths-ignore:
       - '.github/**'
-      - '!.github/workflows/**'
+      - '!.github/workflows/ci.yml'
       - '.travis.yml'
       - '.gitignore'
       - 'docs/**'
@@ -15,7 +15,7 @@ on:
       - 'LICENSE'
   pull_request:
     paths:
-      - "**"
+      - '**'
 
 jobs:
   ci:
@@ -24,47 +24,38 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest]
 
-    steps:
-      - uses: actions/setup-ruby@v1
-        with:
-          ruby-version: '2.6.x'
+    env:
+      GEMS_PATH: ~/vendor/bundle
 
+    steps:
       - name: Checkout
         uses: actions/checkout@v2
         with:
-          fetch-depth: 0
+          fetch-depth: 0  # for posts's lastmod
+
+      - name: Setup Ruby
+        uses: actions/setup-ruby@v1
+        with:
+          ruby-version: 2.6.x
 
       - name: Bundle Caching
-        id: bundle-cache
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
-          path: vendor/bundle
+          path: ${{ env.GEMS_PATH }}
           key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile') }}
           restore-keys: |
             ${{ runner.os }}-gems-
 
-      - name: Install GNU-Coreutils(for macOS)
-        if: runner.os == 'macOS'
-        run: |
-          brew install coreutils
-
-      - name: Bundle config
-        run: |
-          bundle config path vendor/bundle
-
       - name: Bundle Install
-        if: steps.bundle-cache.outputs.cache-hit != 'true'
         run: |
-          bundle install
-
-      - name: Bundle Install locally
-        if: steps.bundle-cache.outputs.cache-hit == 'true'
-        run: |
-          bundle install --local
+          bundle config path ${{ env.GEMS_PATH }}
+          bundle install --jobs 4 --retry 3
 
       - name: Build Site
+        env:
+          JEKYLL_ENV: production
         run: |
-          bash tools/build.sh
+          bundle exec jekyll b
 
       - name: Test Site
         run: |

.github/workflows/issues-cleaner.yml

@@ -0,0 +1,24 @@
+name: "Close stale issues"
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+    - env:
+        DAYS_TO_STALE: ${{ 5 }}
+        DAYS_TO_CLOSE: ${{ 2 }}
+      uses: actions/stale@v3
+      with:
+        repo-token: ${{ secrets.GH_PAT }}
+        stale-issue-message: 'This issue is stale because it has been open ${{ env.DAYS_TO_STALE }} days with no activity. Remove stale label or comment or this will be closed in ${{ env.DAYS_TO_CLOSE }} days'
+        stale-issue-label: 'stale'
+        exempt-issue-labels: 'pending, in progress'
+        stale-pr-message: 'This PR is stale because it has been open ${{ env.DAYS_TO_STALE }} days with no activity. Remove stale label or comment or this will be closed in ${{ env.DAYS_TO_CLOSE }} days'
+        stale-pr-label: 'stale'
+        exempt-pr-labels: 'pending, in progress'
+        days-before-stale: ${{ env.DAYS_TO_STALE }}
+        days-before-close: ${{ env.DAYS_TO_CLOSE }}
+        # debug-only: true

.github/workflows/issues-filter.yml

@@ -0,0 +1,18 @@
+name: "Close Irregular Issues"
+
+on:
+  issues:
+    types: [opened, edited]
+
+jobs:
+  auto_close_issues:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Automatically close issues that don't follow the issue template
+        uses: lucasbento/auto-close-issues@v1.0.2
+        with:
+          github-token: ${{ secrets.GH_PAT }}
+          issue-close-message: "@${issue.user.login}: hello! :wave:\n\nThis issue is being automatically closed because it does not follow the issue template. \n> Follow the template to edit this issue and it will automatically reopen."
+          closed-issues-label: "🙁 Not following issue template"

.github/workflows/pages-deploy.yml.hook

@@ -0,0 +1,71 @@
+name: 'Automatic build'
+on:
+  push:
+    branches:
+      - master
+    paths-ignore:
+      - .gitignore
+      - README.md
+      - LICENSE
+
+jobs:
+  continuous-delivery:
+
+    runs-on: ubuntu-latest
+
+    env:
+      GEMS_PATH: ~/vendor/bundle
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # for posts's lastmod
+
+      - name: Setup Ruby
+        uses: actions/setup-ruby@v1
+        with:
+          ruby-version: 2.6.x
+
+      - name: Bundle Caching
+        uses: actions/cache@v2
+        with:
+          path: ${{ env.GEMS_PATH }}
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
+
+      - name: Bundle Install
+        run: |
+          bundle config path ${{ env.GEMS_PATH }}
+          bundle install --jobs 4 --retry 3
+
+      - name: Check baseurl
+        run: |
+          baseurl="$(grep '^baseurl:' _config.yml | sed "s/.*: *//;s/['\"]//g;s/#.*//")"
+          if [[ -n $baseurl ]]; then
+            echo "SPEC_TEST=_site_no_baseurl" >> $GITHUB_ENV
+          fi
+
+      - name: Build Site
+        env:
+          JEKYLL_ENV: production
+        run: |
+          bundle exec jekyll b
+
+          if [[ -n $SPEC_TEST ]]; then
+            # Bypass the defects of htmlproofer
+            bundle exec jekyll b -b "" -d "$SPEC_TEST"
+          fi
+
+      - name: Test Site
+        run: |
+          if [[ -n $SPEC_TEST ]]; then
+            bash tools/test.sh -d "$SPEC_TEST"
+          else
+            bash tools/test.sh
+          fi
+          
+      - name: Deploy
+        run: |
+          bash tools/deploy.sh

.gitignore

@@ -1,17 +1,8 @@
 # hidden files
 .*
+!.github
 
-# python compiled files
-*.pyc
-
-# jekyll debug
+# jekyll cache 
 _site
-
-# Jeykll Gemfile.lock
 Gemfile.lock
-
-# yui-compressor
-*.jar
-
-# bundle cache
 vendor

.travis.yml

@@ -13,17 +13,14 @@ install:
 addons:
   apt:
     packages:
-    - libcurl4-openssl-dev # required to avoid SSL error (for htmlproofer)
+      - libcurl4-openssl-dev # required to avoid SSL error (for htmlproofer)
 
 script:
-  - >-
-    git clone https://${GH_PAT}@github.com/${GH_USER}/${BUILDER_REPO}.git
-    ${HOME}/${BUILDER_REPO} --depth=1 -q
-  - cp -r ${HOME}/${BUILDER_REPO}/framework/* .
-  - bash _cibuild.sh
+  - git -C "$HOME" clone "$BUILDER_REPO" --depth=1 -q
+  - eval "$BUILD_CMD"
 
 branches:
-  only: stable
+  only: production
 
 git:
   depth: false # for posts lastmod
@@ -40,4 +37,4 @@ notifications:
 
 env:
   global:
-    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
+    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer

Gemfile

@@ -1,14 +1,26 @@
 source "https://rubygems.org"
 
-gem "jekyll", ">=3.8.6"
+gem "jekyll", ">= 3.8.6", "< 5.0"
 
-# Official Plugins
+# plugins
 group :jekyll_plugins do
   gem "jekyll-paginate"
   gem "jekyll-redirect-from"
   gem "jekyll-seo-tag", "~> 2.6.1"
+  gem "jekyll-archives"
+  gem "jekyll-sitemap"
 end
 
 group :test do
-  gem "html-proofer"
+  gem "html-proofer", "~> 3.16.0"
 end
+
+# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+# and associated library.
+install_if -> { RUBY_PLATFORM =~ %r!mingw|mswin|java! } do
+  gem "tzinfo", "~> 1.2"
+  gem "tzinfo-data"
+end
+
+# Performance-booster for watching directories on Windows
+gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?

README.md

@@ -1,262 +1,182 @@
 # Chirpy
 
-🌏 English • [简体中文](docs/README_zh-CN.md)
+Language: English | [简体中文](docs/README_zh-CN.md)
 
-[![Build Status](https://github.com/cotes2020/jekyll-theme-chirpy/workflows/build/badge.svg?event=push)](https://github.com/cotes2020/jekyll-theme-chirpy/actions?query=event%3Apush)
+[![Build Status](https://github.com/cotes2020/jekyll-theme-chirpy/workflows/build/badge.svg?branch=master&event=push)](https://github.com/cotes2020/jekyll-theme-chirpy/actions?query=branch%3Amaster+event%3Apush)
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/8220b926db514f13afc3f02b7f884f4b)](https://app.codacy.com/manual/cotes2020/jekyll-theme-chirpy?utm_source=github.com&utm_medium=referral&utm_content=cotes2020/jekyll-theme-chirpy&utm_campaign=Badge_Grade_Dashboard)
 [![GitHub license](https://img.shields.io/github/license/cotes2020/jekyll-theme-chirpy.svg)](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE)
 [![996.icu](https://img.shields.io/badge/link-996.icu-%23FF4D5B.svg)](https://996.icu)
 
-A minimal, sidebar, responsive web design Jekyll theme, focusing on text presentation, aim to help you easily record and share your knowledge. [Live Demo »](https://chirpy.cotes.info)
+A minimal, sidebar, responsive web design Jekyll theme that focuses on text presentation. Designed to help you record and share your knowledge easily. [Live Demo »](https://chirpy.cotes.info)
 
 [![Devices Mockup](https://raw.githubusercontent.com/cotes2020/jekyll-theme-chirpy/master/assets/img/sample/devices-mockup.png)](https://chirpy.cotes.info)
 
 ## Table of Contents
 
-* [Features](#features)
-* [Installing](#installing)
-* [Usage](#usage)
-* [Contributing](#contributing)
-* [Credits](#credits)
-* [Support](#support)
-* [License](#license)
+- [Features](#features)
+- [Installation](#installation)
+- [Usage](#usage)
+- [Contributing](#contributing)
+- [Credits](#credits)
+- [Supporting](#supporting)
+- [License](#license)
 
 ## Features
 
-* Configurable theme mode
-* Two-level Categories
-* Last modified date for posts
-* Table of Contents
-* Automatically recommend related posts
-* Syntax highlighting
-* Search
-* Atom Feeds
-* Disqus Comments
-* Google Analytics
-* GA Pageviews reporting (Advanced)
-* SEO and Performance Optimization
+- Pinned Posts
+- Configurable theme mode
+- Double-level Categories
+- Last modified date for posts
+- Table of Contents
+- Automatically recommend related posts
+- Syntax highlighting
+- Mathematical expressions
+- Search
+- Atom Feeds
+- Disqus Comments
+- Google Analytics
+- GA Pageviews reporting (Advanced)
+- SEO and Performance Optimization
 
-## Installing
+## Installation
 
-### Prerequisites
+[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) on GitHub, rename the repository to `USERNAME.github.io` (where `USERNAME` is your GitHub username), and then open terminal and clone the fork to local by:
 
-Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installtion of basic environment (`Ruby `, `RubyGems` and `Bundler`). 
-
-To improve the writing experience, we need to use some script tools. If your machine is running Debian or macOS, make sure that [GNU coreutils](https://www.gnu.org/software/coreutils/) is installed. Otherwise, install by:
-
-* Debian
-
-```console
-$ sudo apt-get install coreutils
+```terminal
+$ git clone https://github.com/USERNAME/USERNAME.github.io.git -b master --single-branch
 ```
 
-* macOS
+### Setting up the local envrionment
 
-```console
-$ brew install coreutils
-```
+If you would like to run or build the project on your local machine, please follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll` and `Bundler`.
 
-
-### Jekyll Plugins
-
-[Fork **Chirpy** from GitHub](https://github.com/cotes2020/jekyll-theme-chirpy/fork), then clone your forked repo to local:
-
-```console
-$ git clone git@github.com:USER/jekyll-theme-chirpy.git -b master
-```
-
-and replace the `USER` above to your GitHub username.
-
-The first time you run or build the project on local machine, perform the installation of Jekyll plugins. Go to the root of repo and run:
+Before running or building for the first time, please complete the installation of the Jekyll plugins. Go to the root directory of project and run:
 
 ```terminal
 $ bundle install
 ```
 
-`bundle` will automatically install all the dependent Jekyll Plugins that listed in the `Gemfile`.
+`bundle` will automatically install all the dependencies specified by `Gemfile`.
 
+### Setting up Docker environment (optional)
+
+If you're a loyal fan of [**Docker**](https://www.docker.com/) or just too lazy to install the packages mentioned in [_Setting up the local envrionment_](#setting-up-the-local-envrionment), please make sure you have **Docker Engine** installed and running, and then get Docker image `jekyll/jekyll` from Docker Hub by the following command:
+
+```console
+$ docker pull jekyll/jekyll
+```
 
 ## Usage
 
+### Initialization
 
-### Directory Structure
+Go to the root directory of the project and start initialization:
 
-The main files and related brief introductions are listed below.
-
-```sh
-jekyll-theme-chirpy/
-├── _data
-├── _includes      
-├── _layouts
-├── _posts          # posts stay here
-├── _scripts
-├── .travis.yml     # remove it
-├── .github         # remove this, too
-├── assets      
-├── tabs
-│   └── about.md    # the ABOUT page
-├── .gitignore
-├── 404.html
-├── Gemfile
-├── LICENSE
-├── README.md
-├── _config.yml     # configuration file
-├── tools           # script tools
-├── docs
-├── feed.xml
-├── index.html
-├── robots.txt
-└── sitemap.xml
+```console
+$ bash tools/init.sh
 ```
 
+> **Note**: If you not intend to deploy it on GitHub Pages, append parameter option `--no-gh` at the end of the above command.
 
-As mentioned above, some files or directories should be removed from your repo:
+What it does is:
 
-- .travis.yml
-- .github
+1. Remove some files or directories from your repository:
 
+    - `.travis.yml`
+    - files under `_posts`
+    - folder `docs`
+
+2. If you use the `--no-gh` option, the directory `.github` will be deleted. Otherwise, setup the GitHub Action workflow by removing extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in folder `.github`.
+
+3. Automatically create a commit to save the changes.
 
 ### Configuration
 
 Generally, go to `_config.yml` and configure the variables as needed. Some of them are typical options:
 
-* `url`
-	
-	Set to your website url and there should be no slash symbol at the tail. Format: `<protocol>://<domain>`.
+- `url`
+- `avatar`
+- `timezone`
+- `theme_mode`
 
+### Run Locally
 
-* `avatar`
-    
-    It defines the image file location of avatar. The sample image is `/assets/img/sample/avatar.jpg`, and should be replaced by your own one(a square image). Notice that a huge image file will increase the load time of your site, so keep your avatar image size as samll as possible(may be *<https://tinypng.com/>* will help).
-
-* `timezone`
-
-    To ensure that the posts' release date matches the city you live in, please modify the field `timezone` correctly. A list of all available values can be found on [TimezoneConverter](http://www.timezoneconverter.com/cgi-bin/findzone/findzone) or [Wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
-
-* `theme_mode`
-  
-	There are three options for the theme color scheme:
-	
-	- **dual** 	- The default color scheme will follow the system settings, but if the system does not support dark mode, or the browser does not support `Media Queries Level 5`, the theme will be displayed as `light` mode by default. Anyway, the bottom left corner of the Sidebar will provide a button for users to switch color schemes.
-
-	- **dark**	- Always show dark mode.
-	- **light**	- Always show light mode.
-
-
-###  Run Locally
-
-You may want to preview the site content before publishing, so just run the script tool:
+You may want to preview the site contents before publishing, so just run it by:
 
 ```terminal
-$ bash tools/run.sh
+$ bundle exec jekyll s
 ```
 
-Open a modern brower and visit at <http://localhost:4000>.
+Then open a browser and visit to <http://localhost:4000>.
 
-Few days later, you may find that the file modification(e.g. edits to a post) does not refresh in real time by using `run.sh`. Don't worry, the advanced option `-r` (or `--realtime`) will solve this problem, but it requires [**fswatch**](http://emcrisostomo.github.io/fswatch/) to be installed on your machine. Type `-h` for more information.
+### Run on Docker
 
-###  Deploying to GitHub Pages
-
-Before the deployment begins, checkout the file `_config.yml` and make sure that the `url` has been configured. What's more, if you prefer the [Project site on GitHub](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and also use the default domain `<username>.github.io`, remember to change the `baseurl` to your project name that starting with a slash. For example, `/project`.
-
-#### Option 1: Built by GitHub Pages
-
-By deploying the site in this way, you're allowed to push the source code directly to the remote.
-
-> **Note**: If you want to use any third-party Jekyll plugins that not in [this list](https://pages.github.com/versions/), stop reading the current approach and go to [*Option 2: Build locally*](#option-2-build-locally).
-
-**1**. Rename the repository to:
-
-|Site Type | Repo's Name|
-|:---|:---|
-|User or Organization | `<username>.github.io`|
-|Project| Any one except `<username>.github.io`, let's say `project`|
-
-**2**. Commit the changes of the repo first, then run the initialization script:
+Run the site on Docker with the following command:
 
 ```terminal
-$ bash tools/init.sh
+$ docker run -it --rm \
+    --volume="$PWD:/srv/jekyll" \
+    -p 4000:4000 jekyll/jekyll \
+    jekyll serve
 ```
 
->**Note**: The *Recent Update* requires the posts' latest git-log date, so make sure the changes in `_posts` have been committed before running this command.
+### Deployment
 
-it will automatically generates the *Latest Modified Date* and *Categories / Tags* page for the posts and submit a commit. Its output is similar to the following log:
+Before the deployment begins, checkout the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [_project site_](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base url on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starting with a slash. For example, `/project`.
 
-```terminal
-[INFO] Success to update lastmod for 4 post(s).
-[INFO] Succeed! 3 category-pages created.
-[INFO] Succeed! 4 tag-pages created.
-[Automation] Updated the Categories, Tags, Lastmod for post(s).
- 11 files changed, 46 insertions(+), 3 deletions(-)
- ...
-Updated the Categories, Tags, Lastmod for post(s).
-```
+Assuming you have already gone through the [initialization](#initialization), you can now choose ONE of the following methods to deploy your website.
 
-**3**. Push the changes to `origin/master` then go to GitHub website and enable GitHub Pages service for the repo.
+#### Deploy on GitHub Pages
 
-**4**. Check it out:
+For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the Pages service.
 
-|Site Type | Site URL |
-|:---|:---|
-|User or Organization | `https://<username>.github.io/`|
-|Project| `https://<username>.github.io/project/`|
+1. Push any commit to `origin/master` to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
 
+2. Browse to your repo's landing page on GitHub and select the branch `gh-pages` as the [publishing source](https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site) throught _Settings_ → _Options_ → _GitHub Pages_:
+    ![gh-pages-sources](https://raw.githubusercontent.com/cotes2020/jekyll-theme-chirpy/master/assets/img/sample/gh-pages-sources.png)
 
-#### Option 2: Build Locally
+3. Visit your website at the address indicated by GitHub.
 
-For security reasons, GitHub Pages runs on `safe` mode, which means the third-party Jekyll plugins or custom scripts won't work. If you want to use any another plugins that not in the [whitelist](https://pages.github.com/versions/), **you have to generate the site locally rather than on GitHub Pages**.
+#### Deploy on Other Platforms
 
-**1**. Browse to GitHub website, create a brand new repo named: 
+On platforms other than GitHub, we cannot enjoy the convenience of **GitHub Actions**. Therefore, we should build the site locally (or on some other 3rd-party CI platform) and then put the site files on the server.
 
-|Site Type | Repo's Name|
-|:---|:---|
-|User or Organization | `<username>.github.io`|
-|Project| Any one except `<username>.github.io`, let's say `project`|
-
-and clone it.
-
-**2**. In the root of the source project, build your site by:
+Go to the root of the source project, build your site by:
 
 ```console
-$ bash tools/build.sh -d /path/to/local/project/
+$ JEKYLL_ENV=production bundle exec jekyll b
 ```
 
-The generated static files will be placed in the root of `/path/to/local/project`. Commit and push the changes to the `master` branch on GitHub.
+Or, build the site with Docker by:
 
-**3**. Go to GitHub website and enable Pages service for the new repository.
-
-**4**. Visit at:
-
-|Site Type | Site URL |
-|:---|:---|
-|User or Organization | `https://<username>.github.io/`|
-|Project| `https://<username>.github.io/project/`|
-
-#### Finishing work
-
-No matter which way you choose to deploy the website on GitHub, please enforce the `HTTPS` for it. See official docs: [Configuring a publishing source for your GitHub Pages site](https://help.github.com/en/github/working-with-github-pages/securing-your-github-pages-site-with-https).
+```terminal
+$ docker run -it --rm \
+    --env JEKYLL_ENV=production \
+    --volume="$PWD:/srv/jekyll" \
+    jekyll/jekyll \
+    jekyll build
+```
 
+Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to your web server.
 
 ### Documentation
 
-For more details and the better reading experience, please check out the [tutorial in demo site](https://chirpy.cotes.info/categories/tutorial/). In the meanwhile, a copy of the tutorial is also available on the [Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki).
+For more details and the better reading experience, please check out the [tutorials on demo site](https://chirpy.cotes.info/categories/tutorial/). In the meanwhile, a copy of the tutorial is also available on the [Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki).
 
 ## Contributing
 
 The old saying, "Two heads are better than one." Consequently, welcome to report bugs, improve code quality or submit a new feature. For more information, see [contributing guidelines](.github/CONTRIBUTING.md).
 
-
 ## Credits
 
-This theme is mainly built with [Jekyll](https://jekyllrb.com/) ecosystem, [Bootstrap](https://getbootstrap.com/), [Font Awesome](https://fontawesome.com/) and some other wonderful tools(their copyright information can be found in the relevant files).
+This theme is mainly built with [Jekyll](https://jekyllrb.com/) ecosystem, [Bootstrap](https://getbootstrap.com/), [Font Awesome](https://fontawesome.com/) and some other wonderful tools (their copyright information can be found in the relevant files).
 
-:tada:Thanks to all the volunteers who contributed to this project, their GitHub IDs are on [this list](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors). Also, I won't forget those guys who submitted the issues or unmerged PR because they reported bugs, shared ideas or inspired me to write more readable documentation.
+:tada: Thanks to all the volunteers who contributed to this project, their GitHub IDs are on [this list](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors). Also, I won't forget those guys who submitted the issues or unmerged PR because they reported bugs, shared ideas or inspired me to write more readable documentation.
 
+## Supporting
 
-## Support
-
-If you enjoy this theme or find it helpful, please consider becoming my sponsor, I'd really appreciate it! Click the button <kbd>:heart:Sponsor</kbd> at the top of the [Home Page](https://github.com/cotes2020/jekyll-theme-chirpy) and choose a link that suits you to donate; this will encourage and help me better maintain the project.
-
+If you enjoy this theme or find it helpful, please consider becoming my sponsor, I'd really appreciate it! Click the button <kbd>:heart: Sponsor</kbd> at the top of the [Home Page](https://github.com/cotes2020/jekyll-theme-chirpy) and choose a link that suits you to donate; this will encourage and help me better maintain the project.
 
 ## License
 
-This work is published under [MIT](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE) License.
+This work is published under [MIT](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE) License.

_config.yml

@@ -7,7 +7,6 @@
 
 # jekyll-seo-tag settings › https://github.com/jekyll/jekyll-seo-tag/blob/master/docs/usage.md
 #--------------------------
-
 title: Chirpy                          # the main title
 
 tagline: A text-focused Jekyll theme.  # it will display as the sub-title
@@ -17,8 +16,8 @@ description: >-                        # used by seo meta and the atom feed
   bootstrap Jekyll theme with responsive web design
   and focuses on text presentation.
 
-# Replace with the website url, e.g. 'https://username.github.io'
-url: 'protocol://domain'
+# fill in the base hostname & protocol for your site, e.g., 'https://username.github.io'
+url: ''
 
 author: your_full_name                  # change to your full name
 
@@ -42,21 +41,20 @@ social:
     # - https://www.linkedin.com/in/username
 
 google_site_verification: google_meta_tag_verification # change to your verification string
-
 #--------------------------
 
-# if your site type is Project Pages site, change below value to '/projectname'
+
+# Only if your site type is GitHub Project sites and doesn't have a custom domain,
+# change below value to '/projectname'.
 baseurl: ''
 
 # Change to your timezone › http://www.timezoneconverter.com/cgi-bin/findzone/findzone
 timezone: Asia/Shanghai
 
 google_analytics:
-  # Fill with your Google Analytics ID
-  id: ''
-  # The Google Analytics pageviews switch.
-
+  id: ''          # Fill with your Google Analytics ID
   pv:
+    # The Google Analytics pageviews switch.
     # DO NOT enable it unless you know how to deploy the Google Analytics superProxy.
     enabled: false
     # the next options only valid when `google_analytics.pv` is enabled.
@@ -80,7 +78,7 @@ disqus:
 #
 theme_mode: dual
 
-# boolean type, global switch for ToC in posts.
+# boolean type, the global switch for ToC in posts.
 toc: true
 
 paginate: 10
@@ -101,18 +99,25 @@ kramdown:
       line_numbers: true
       start_line: 1
 
+# DO NOT change this unless you're a Pro user on Jekyll and Web development,
+# or you think you're smart enough to change other relevant URLs within this template.
 permalink: /posts/:title/
 
+collections:
+  tabs:
+    output: true
+    sort_by: order
+
+
 defaults:
   -
     scope:
-      path: ""          # An empty string here means all files in the project
+      path: ''          # An empty string here means all files in the project
       type: posts
     values:
       layout: post
       comments: true    # Enable comments in posts.
       toc: true         # Display TOC column in posts.
-      location: Post
       breadcrumb:
         -
           label: Posts
@@ -122,12 +127,17 @@ defaults:
       path: _drafts
     values:
       comments: false
+  -
+    scope:
+      path: index.html
+    values:
+      breadcrumb:
+        -
+          label: Posts
   -
     scope:
       path: tags
     values:
-      tab_active: Tags
-      location: Tag
       breadcrumb:
         -
           label: Home
@@ -139,8 +149,6 @@ defaults:
     scope:
       path: categories
     values:
-      tab_active: Categories
-      location: Category
       breadcrumb:
         -
           label: Home
@@ -150,7 +158,8 @@ defaults:
           url: /tabs/categories/
   -
     scope:
-      path: tabs
+      path: ''
+      type: tabs             # see `site.collections`
     values:
       layout: page
       dynamic_title: true    # Hide title in mobile screens.
@@ -158,12 +167,6 @@ defaults:
         -
           label: Home
           url: /
-  -
-    scope:
-      path: assets/data
-    values:
-      layout: compress
-
 
 sass:
   sass_dir: /assets/css
@@ -171,34 +174,27 @@ sass:
 
 compress_html:
   clippings: all
-  comments: ["<!-- ", " -->"]
-  endings: [html, head, body, dt, dd, rt, rp,
-            optgroup, option, colgroup, caption,
-            thead, tbody, tfoot, tr, td, th]
+  comments: all
+  endings: all
   profile: false
   blanklines: false
   ignore:
     envs: []
 
 exclude:
-  - vendor        # Avoid Jekyll mistakenly read the vender directory on Travis-CI's VM .
+  - vendor
   - Gemfile.lock
   - Gemfile
   - tools
   - docs
   - README.md
+  - LICENSE
 
-sitemap_exclude:  # Sitemap will exclude the following items.
-  fuzzy:
-    - /assets/
-  accurate:
-    - /norobots/
-    - /tabs/
-    - /categories/
-    - /tags/
-    - /posts/
-    - 404.html
-    - feed.xml
-    - sitemap.xml
-    - robots.txt
-    - redirects.json
+jekyll-archives:
+  enabled: [categories, tags]
+  layouts:
+    category: category
+    tag: tag
+  permalinks:
+    tag: '/tags/:name/'
+    category: '/categories/:name/'

_data/contact.yml

@@ -0,0 +1,34 @@
+#  The contact options.
+#  v2.3
+#  https://github.com/cotes2020/jekyll-theme-chirpy
+#  © 2020 Cotes Chung
+#  MIT Licensed
+
+-
+  type: github
+  icon: 'fab fa-github-alt'
+-
+  type: twitter
+  icon: 'fab fa-twitter'
+-
+  type: email
+  icon: 'fas fa-envelope'
+  noblank: true            # open link in current tab
+-
+  type: rss
+  icon: 'fas fa-rss'
+  noblank: true
+
+# Uncomment and complete the url below to enable more contact options
+# -
+#   type: mastodon
+#   icon: 'fab fa-mastodon'   # icons powered by <https://fontawesome.com/>
+#   url:  ''                  # Fill with your mastodon account page
+# -
+#   type: linkedin
+#   icon: 'fab fa-linkedin'   # icons powered by <https://fontawesome.com/>
+#   url:  ''                  # Fill with your Linkedin homepage
+# -
+#   type: stack-overflow
+#   icon: 'fab fa-stack-overflow'
+#   url:  ''                  # Fill with your stackoverflow homepage

_data/date_format.yml

@@ -6,4 +6,6 @@
 
 
 tooltip: "%a, %b %e, %Y, %l:%M %p %z"
-post: "%b %e, %Y"
+post:
+  long: "%b %e, %Y"
+  short: "%b %e"

_data/meta.yml

@@ -0,0 +1,3 @@
+name: Chirpy
+version: 2.6.1
+homepage: https://github.com/cotes2020/jekyll-theme-chirpy/

_data/share.yml

@@ -24,6 +24,11 @@ platforms:
 
   # Uncomment below if you need to.
   # -
+  #   type: Linkedin
+  #   icon: "fab fa-linkedin"
+  #   link: "https://www.linkedin.com/sharing/share-offsite/?url=URL"
+  #
+  # -
   #   type: Weibo
   #   icon: "fab fa-weibo"
   #   link: "http://service.weibo.com/share/share.php?title=TITLE&url=URL"

_data/tabs.yml

@@ -1,30 +0,0 @@
-#  The tab data.
-#  v2.1
-#  https://github.com/cotes2020/jekyll-theme-chirpy
-#  © 2020 Cotes Chung
-#  MIT Licensed
-
-
--
-  name: Home
-  icon: "fas fa-home"
--
-  name: Categories
-  icon: "fas fa-stream"
-  path: tabs
-  url: categories
--
-  name: "Tags"
-  icon: "fas fa-tags"
-  path: tabs
-  url: tags
--
-  name: "Archives"
-  path: tabs
-  url: archives
-  icon: "fas fa-archive"
--
-  name: "About"
-  icon: "fas fa-info"
-  path: tabs
-  url: about

_includes/css-selector.html

@@ -0,0 +1,55 @@
+<!--
+  CSS selector for site.
+  Chirpy v2.3
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT Licensed
+-->
+
+{% if page.layout == 'home' %}
+  <link rel="preload" href="{{ '/assets/css/home.css' | relative_url }}" as="style">
+  <link rel="stylesheet" href="{{ '/assets/css/home.css' | relative_url }}">
+
+{% elsif page.layout == 'page' %}
+
+  {% if page.collection == 'tabs' and page.title != 'About' %}
+
+    {% if page.title == 'Categories' %}
+      <link rel="preload" href="{{ '/assets/css/categories.css' | relative_url }}" as="style">
+      <link rel="stylesheet" href="{{ '/assets/css/categories.css' | relative_url }}">
+   
+    {% elsif page.title == 'Tags' %}
+      <link rel="preload" href="{{ '/assets/css/tags.css' | relative_url }}" as="style">
+      <link rel="stylesheet" href="{{ '/assets/css/tags.css' | relative_url }}">
+   
+    {% elsif page.title == 'Archives'%}
+      <link rel="preload" href="{{ '/assets/css/archives.css' | relative_url }}" as="style">
+      <link rel="stylesheet" href="{{ '/assets/css/archives.css' | relative_url }}">
+   
+    {% endif %}
+
+  {% else %}
+
+    <link rel="preload" href="{{ '/assets/css/page.css' | relative_url }}" as="style">
+    <link rel="stylesheet" href="{{ '/assets/css/page.css' | relative_url }}">
+
+  {% endif %}
+
+{% elsif page.layout == 'category' or page.layout == 'tag' %}
+
+  <link rel="preload" href="{{ '/assets/css/category-tag.css' | relative_url }}" as="style">
+  <link rel="stylesheet" href="{{ '/assets/css/category-tag.css' | relative_url }}">
+
+{% elsif page.layout == 'post' %}
+
+  <link rel="preload" as="style" href="{{ '/assets/css/post.css' | relative_url }}">
+  <link rel="stylesheet" href="{{ '/assets/css/post.css' | relative_url }}">
+
+  {% if site.toc and page.toc %}
+
+    <link rel="preload" as="style" href="{{ '/assets/css/lib/bootstrap-toc.min.css' | relative_url }}">
+    <link rel="stylesheet" href="{{ '/assets/css/lib/bootstrap-toc.min.css' | relative_url }}" />
+
+  {% endif %}
+
+{% endif %}

_includes/disqus.html

@@ -7,11 +7,13 @@
   MIT License
 -->
 
-<div id="disqus" class="pt-2 pb-4">
-  <p class="font-italic text-muted small">Comments powered by <a href="https://disqus.com/">Disqus</a>.</p>
+<div id="disqus" class="pt-2 pb-2">
+  <p class="font-italic text-center text-muted small">
+    Comments powered by <a href="https://disqus.com/">Disqus</a>.
+  </p>
 </div>
 
-<script src="{{ site.baseurl }}/assets/lib/jquery.disqusloader.min.js"></script>
+<script src="{{ site.baseurl }}/assets/js/lib/jquery.disqusloader.min.js"></script>
 <script>
   var options = {
     scriptUrl: '//{{ site.disqus.shortname }}.disqus.com/embed.js',

_includes/fixlinenos.html

@@ -1,9 +0,0 @@
-<!--
-  Fixed kramdown code highlight rendering:
-  https://github.com/penibelst/jekyll-compress-html/issues/101
-  https://github.com/penibelst/jekyll-compress-html/issues/71#issuecomment-188144901
--->
-{% if _content contains '<pre class="highlight">' %}
-  {% assign _content = _content | replace: '<pre class="highlight"><code', '<code' %}
-  {% assign _content = _content | replace: '</code></pre>', '</code>' %}
-{% endif %}

_includes/footer.html

@@ -22,9 +22,9 @@
     <div class="footer-right">
       <p class="mb-0">
         Powered by
-        <a href="https://jekyllrb.com" target="_blank">Jekyll</a>
+        <a href="https://jekyllrb.com" target="_blank" rel="noopener">Jekyll</a>
         with
-        <a href="https://github.com/cotes2020/jekyll-theme-chirpy/">Chirpy</a>
+        <a href="{{ site.data.meta.homepage }}" target="_blank" rel="noopener">{{ site.data.meta.name }}</a>
         theme.
       </p>
     </div>

_includes/google-analytics.html

@@ -5,12 +5,12 @@
   © 2017-2019 Cotes Chung
   MIT License
 -->
+<!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id={{ site.google_analytics.id }}"></script>
 <script>
-  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
-
-  ga('create', '{{ site.google_analytics.id }}', 'auto');
-  ga('send', 'pageview');
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  
+  gtag('js', new Date());
+  gtag('config', '{{ site.google_analytics.id }}');
 </script>

_includes/head.html

@@ -9,24 +9,24 @@
 <head>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
-
-  <title>
-  {%- if page.layout == "home" -%}
-    {{- site.title -}}
-  {%- else -%}
-    {{ page.title }} | {{ site.title }}
-  {%- endif -%}
-  </title>
+  <meta name="theme" content="{{ site.data.meta.name }} v{{ site.data.meta.version }}">
 
   {% seo title=false %}
 
+  <title>
+  {%- unless page.layout == "home" -%}
+    {{ page.title | append: " | "}}
+  {%- endunless -%}
+    {{ site.title }}
+  </title>
+
   {% include favicons.html %}
 
-  <!-- google fonts -->
+  <!-- Google Fonts -->
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin="anonymous">
   <link rel="dns-prefetch" href="https://fonts.gstatic.com">
 
-  <!-- ga -->
+  <!-- GA -->
   {% if jekyll.environment == 'production' %}
     <link rel="preconnect" href="https://www.google-analytics.com" crossorigin="use-credentials">
     <link rel="dns-prefetch" href="https://www.google-analytics.com">
@@ -40,111 +40,30 @@
     {% endif %}
   {% endif %}
 
-  <!-- jsdelivr CDN -->
+  <!-- jsDelivr CDN -->
   <link rel="preconnect" href="cdn.jsdelivr.net">
   <link rel="dns-prefetch" href="cdn.jsdelivr.net">
 
-  <link rel="preload" as="style"
-    href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css"
-    integrity="sha256-LA89z+k9fjgMKQ/kq4OO2Mrf8VltYml/VES+Rg0fh20=" crossorigin>
-
-  <link rel="preload" as="style"
-    href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css"
-    integrity="sha256-+N4/V/SbAFiW1MPBCXnfnP9QSN3+Keu+NlB+0ev/YKQ="
-    crossorigin="anonymous">
-
+  <!-- Bootstrap -->
   <link rel="stylesheet"
     href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css"
     integrity="sha256-LA89z+k9fjgMKQ/kq4OO2Mrf8VltYml/VES+Rg0fh20=" crossorigin="anonymous">
 
+  <!-- Font Awesome -->
   <link rel="stylesheet"
     href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css"
     integrity="sha256-+N4/V/SbAFiW1MPBCXnfnP9QSN3+Keu+NlB+0ev/YKQ="
     crossorigin="anonymous">
 
-  {% if page.layout == 'home' %}
-    <link rel="preload" href="{{ site.baseurl }}/assets/css/home.css" as="style">
-    <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/home.css">
+  {% include css-selector.html %}
 
-  {% elsif page.layout == 'page' %}
+  <!-- JavaScripts -->
 
-    {% if page.title == 'Categories' %}
-      <link rel="preload" href="{{ site.baseurl }}/assets/css/categories.css" as="style">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/categories.css">
+  <script src="https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
 
-    {% elsif page.title == 'Tags' %}
-      <link rel="preload" href="{{ site.baseurl }}/assets/css/tags.css" as="style">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/tags.css">
+  <script async
+    src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.15.0,npm/bootstrap@4/dist/js/bootstrap.min.js"></script>
 
-    {% elsif page.title == 'Archives' %}
-      <link rel="preload" href="{{ site.baseurl }}/assets/css/archives.css" as="style">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/archives.css">
+  {% include js-selector.html %}
 
-    {% else %}
-      <link rel="preload" href="{{ site.baseurl }}/assets/css/page.css" as="style">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/page.css">
-
-    {% endif %}
-
-  {% elsif page.layout == 'category' or page.layout == 'tag' %}
-      <link rel="preload" href="{{ site.baseurl }}/assets/css/category-tag.css" as="style">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/category-tag.css">
-
-  {% elsif page.layout == 'post' %}
-    <link rel="preload" as="style" href="{{ site.baseurl }}/assets/css/post.css">
-    <link rel="stylesheet" href="{{ site.baseurl }}/assets/css/post.css">
-
-    {% if site.toc and page.toc %}
-      <link rel="preload" as="style" href="{{ site.baseurl }}/assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.css">
-      <link rel="stylesheet" href="{{ site.baseurl }}/assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.css" />
-    {% endif %}
-
-  {% endif %}
-
-
-  <!-- jquery -->
-  <link rel="preload" as="script"
-    href="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.min.js"
-    integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous">
-
-  <!-- popper -->
-  <link rel="preload" as="script"
-    href="https://cdn.jsdelivr.net/npm/popper.js@1.15.0/dist/umd/popper.min.js"
-    integrity="sha256-fTuUgtT7O2rqoImwjrhDgbXTKUwyxxujIMRIK7TbuNU=" crossorigin>
-
-  <script src="https://cdn.jsdelivr.net/npm/jquery@3.4.1/dist/jquery.min.js"
-    integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
-
-  <script>
-    window.jQuery || document.write('<script src="{{ site.baseurl }}/assets/lib/jquery-3.4.1.min.js"><\/script>');
-  </script>
-
-  <script src="https://cdn.jsdelivr.net/npm/popper.js@1.15.0/dist/umd/popper.min.js"
-    integrity="sha256-fTuUgtT7O2rqoImwjrhDgbXTKUwyxxujIMRIK7TbuNU=" crossorigin="anonymous"></script>
-
-  <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/js/bootstrap.min.js"
-    integrity="sha256-5+02zu5UULQkO7w1GIr6vftCgMfFdZcAHeDtFnKZsBs=" crossorigin="anonymous" async></script>
-
-  <script src="{{ site.baseurl }}/assets/js/dist/commons.js" async></script>
-
-  {% if page.layout == 'home' or page.layout == 'post' %}
-    <script src="{{ site.baseurl }}/assets/js/dist/timeago.min.js" async></script>
-    {% if site.google_analytics.pv.enabled %}
-      <script src="{{ site.baseurl }}/assets/data/pv-data.json"></script>
-      <script src="{{ site.baseurl }}/assets/lib/countUp.min.js" async></script>
-      <script src="{{ site.baseurl }}/assets/js/dist/pageviews.min.js" async></script>
-    {% endif %}
-  {% endif %}
-
-  {% if site.toc and page.toc and page.layout == 'post' %}
-    <link rel="preload" as="script" href="{{ site.baseurl }}/assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.js">
-    <script src="{{ site.baseurl }}/assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.js" async></script>
-    <script src="{{ site.baseurl }}/assets/js/dist/toc.min.js" async></script>
-  {% endif %}
-
-  <script src="{{ site.baseurl }}/assets/js/dist/tooltip-loader.min.js" async></script>
-
-  <!-- PWA -->
-  <script src="{{ '/app.js' | relative_url }}" defer></script>
-
-</head>
+</head>

_includes/js-selector.html

@@ -0,0 +1,41 @@
+<!--
+  JS selector for site.
+  Chirpy v2.3
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT Licensed
+-->
+
+{% if page.layout == 'home' %}
+
+  <script async src="{{ '/assets/js/home.min.js' | relative_url }}"></script>
+
+{% elsif page.layout == 'post' %}
+
+  <script async src="{{ '/assets/js/post.min.js' | relative_url }}"></script>
+
+  {% if page.math %}
+    <!-- MathJax -->
+    <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+    <script async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
+  {% endif %}
+
+{% elsif page.layout == 'page' %}
+
+  {% if page.title == 'Categories' and page.collection == 'tabs' %}
+    <script async src="{{ '/assets/js/categories.min.js' | relative_url }}"></script>
+  {% else %}
+    <script async src="{{ '/assets/js/page.min.js' | relative_url }}"></script>
+  {% endif %}
+
+{% else %}
+
+  <script async src="{{ '/assets/js/page.min.js' | relative_url }}"></script>
+
+{% endif %}
+
+
+{% if jekyll.environment == 'production' %}
+  <!-- PWA -->
+  <script defer src="{{ '/app.js' | relative_url }}"></script>
+{% endif %}

_includes/lozad.html

@@ -1,7 +1,8 @@
 <!-- image lazy load: https://github.com/ApoorvSaxena/lozad.js -->
 <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lozad/dist/lozad.min.js"></script>
+
 <script type="text/javascript">
-  const el = document.querySelectorAll('#post-wrapper img');
-  const observer = lozad(el);
+  const imgs = document.querySelectorAll('#post-wrapper img');
+  const observer = lozad(imgs);
   observer.observe();
 </script>

_includes/mode-toggle.html

@@ -74,7 +74,7 @@
 
     get isDarkMode() { return this.mode == ModeToggle.DARK_MODE; }
 
-    get isLightkMode() { return this.mode == ModeToggle.LIGHT_MODE; }
+    get isLightMode() { return this.mode == ModeToggle.LIGHT_MODE; }
 
     get hasMode() { return this.mode != null; }
 
@@ -83,7 +83,7 @@
     flipMode() {
       if (this.hasMode) {
         if (this.isSysDarkPrefer) {
-          if (this.isLightkMode) {
+          if (this.isLightMode) {
             this.clearMode();
           } else {
             this.setLight();
@@ -115,4 +115,4 @@
     toggle.flipMode();
   });
 
-</script>
+</script>

_includes/no-linenos.html

@@ -1,12 +1,14 @@
 {% comment %}
-  Remove line numbers from code snippets.
+  Remove the line number of the code snippet.
   v2.2
   https://github.com/cotes2020/jekyll-theme-chirpy
   © 2020 Cotes Chung
   Published under the MIT License
 {% endcomment %}
 
-{% if _content contains '<td class="rouge-gutter gl"><pre class="lineno">' %}
-  {% assign _content = _content | replace: '<td class="rouge-gutter gl"><pre class="lineno">', '<!-- <td class="rouge-gutter gl"><pre class="lineno">'%}
-  {% assign _content = _content | replace: '</td><td class="rouge-code">', '</td> --><td class="rouge-code">' %}
+{% assign content = include.content %}
+
+{% if content contains '<td class="rouge-gutter gl"><pre class="lineno">' %}
+  {% assign content = content | replace: '<td class="rouge-gutter gl"><pre class="lineno">', '<!-- <td class="rouge-gutter gl"><pre class="lineno">'%}
+  {% assign content = content | replace: '</td><td class="rouge-code">', '</td> --><td class="rouge-code">' %}
 {% endif %}

_includes/panel.html

@@ -10,61 +10,48 @@
 
   <div class="access">
 
-  {% if site.data.updates %}
-
-    {% include update_list.html %}
-
-    {% if update_list.size > 0 %}
-
+  {% include update-list.html %}
+  
+  {% if update_list.size > 0 %}
+    
     <div id="access-lastmod" class="post">
-      <h3 data-toc-skip>
-        {{- site.data.label.panel.lastmod -}}
-      </h3>
+      <span>{{- site.data.label.panel.lastmod -}}</span>
       <ul class="post-content pl-0 pb-1 ml-1 mt-2">
 
       {% for item in update_list %}
-        {% assign post_url = item | split: "::" | last | prepend: "/posts/" | append: "/" %}
-        {% assign post = site.posts | where: "url", post_url | first %}
-
-        {% if post %}
-          {% assign url = post.url | prepend: site.baseurl %}
-
-          <li><a href="{{ url }}">{{ post.title }}</a></li>
-
-          {% assign sum = sum | plus: 1 %}
-          {% if sum >= MAX_SIZE %} {% break %} {% endif %}
-
-        {% endif %}
-
+        {% assign index = item | split: "::" | last | plus: 0 %}
+        {% assign post = site.posts[index] %}
+        {% assign url = post.url | relative_url %}
+        <li><a href="{{ url }}">{{ post.title }}</a></li>
       {% endfor %}
 
       </ul>
-    </div><!-- #access-lastmod -->
+    </div> <!-- #access-lastmod -->
+  
+  {% endif %}
 
-    {% endif %}
-
-  {% endif %} <!-- site.data.updates -->
+  {% include trending-tags.html %}
 
+  {% if trending_tags.size > 0 %}
     <div id="access-tags">
-      <h3 data-toc-skip>
-        {{- site.data.label.panel.trending_tags -}}
-      </h3>
+      <span>{{- site.data.label.panel.trending_tags -}}</span>
       <div class="d-flex flex-wrap mt-3 mb-1 mr-3">
-      {% include trending-tags.html %}
+      
       {% for tag in trending_tags %}
         {% capture url %}/tags/{{ tag | downcase | url_encode }}/{% endcapture %}
         <a class="post-tag" href="{{ url | relative_url }}">{{ tag | replace: '-', ' ' }}</a>
-       {% endfor %}
+      {% endfor %}
+
       </div>
     </div>
-
+  {% endif %}
   </div> <!-- .access -->
 
   {% if page.layout == 'post' and site.toc and page.toc %}
   <div id="toc-wrapper" class="pl-0 pr-4 mb-5">
-    <h3 data-toc-skip class="pl-3 pt-2 mb-3">
+    <span class="pl-3 pt-2 mb-2">
       {{- site.data.label.panel.toc -}}
-    </h3>
+    </span>
     <nav id="toc" data-toggle="toc"></nav>
   </div>
   {% endif %}

_includes/post-paginator.html

@@ -10,17 +10,15 @@
 <ul class="pagination mt-4 mb-0 pl-lg-2">
   <!-- left arrow -->
   {% if paginator.previous_page %}
-  <li class="page-item">
-    <a class="page-link btn-box-shadow" href="{{ site.baseurl }}{{ paginator.previous_page_path }}">
+    {% assign prev_url = paginator.previous_page_path | relative_url %}
+  {% else %}
+    {% assign prev_url = "#" %}
+  {% endif %}
+  <li class="page-item {% unless paginator.previous_page %}disabled{% endunless %}">
+    <a class="page-link btn-box-shadow" href="{{ prev_url }}" aria-label="previous-page">
       <i class="fas fa-angle-left"></i>
     </a>
   </li>
-  {% else %}
-  <li class="page-item disabled">
-    <a class="page-link btn-box-shadow" href="#"><i class="fas fa-angle-left"></i></a>
-  </li>
-  {% endif %}
-  <!-- endof left arrow -->
 
   <!-- page numbers -->
   {% assign left_ellipsis = false %}
@@ -51,38 +49,37 @@
     {% endif %}
 
     {% if show %}
-        <!-- show number -->
-        <li class="page-item {% if i == paginator.page %} active{% endif %}">
-          <a class="page-link btn-box-shadow" href="{{ site.baseurl }}/{% if i > 1%}page{{ i }}/{% endif %}">{{ i }}</a>
+      <!-- show number -->
+      <li class="page-item {% if i == paginator.page %} active{% endif %}">
+        <a class="page-link btn-box-shadow" href="{{ site.baseurl }}/{% if i > 1%}page{{ i }}/{% endif %}">{{ i }}</a>
+      </li>
+    {% else %}
+      <!-- hide number -->
+      {% if i < pre and left_ellipsis == false %}
+        <li class="page-item disabled">
+          <span class="page-link btn-box-shadow">...</span>
         </li>
-      {% else %}
-        <!-- hide number -->
-        {% if i < pre and left_ellipsis == false %}
-          <li class="page-item disabled">
-            <span class="page-link btn-box-shadow">...</span>
-          </li>
-          {% assign left_ellipsis = true %}
-        {% elsif i > next and right_ellipsis == false %}
-          <li class="page-item disabled">
-            <span class="page-link btn-box-shadow">...</span>
-          </li>
-          {% assign right_ellipsis = true %}
-        {% endif %}
+        {% assign left_ellipsis = true %}
+      {% elsif i > next and right_ellipsis == false %}
+        <li class="page-item disabled">
+          <span class="page-link btn-box-shadow">...</span>
+        </li>
+        {% assign right_ellipsis = true %}
       {% endif %}
+    {% endif %}
 
   {% endfor %}
 
   <!-- right arrow -->
-  {% if paginator.next_page %}
-  <li class="page-item">
-    <a class="page-link btn-box-shadow" href="{{ site.baseurl }}{{ paginator.next_page_path }}">
+  {% if paginator.next_page_path %}
+    {% assign next_url = paginator.next_page_path | relative_url %}
+  {% else %}
+    {% assign next_url = "#" %}
+  {% endif %}
+  <li class="page-item {% unless paginator.next_page_path %}disabled{% endunless %}">
+    <a class="page-link btn-box-shadow" href="{{ next_url }}" aria-label="next-page">
       <i class="fas fa-angle-right"></i>
     </a>
   </li>
-  {% else %}
-  <li class="page-item disabled">
-    <a class="page-link btn-box-shadow" href="#"><i class="fas fa-angle-right"></i></a>
-  </li>
-  {% endif %}
 
-</ul> <!-- .pagination -->
+</ul> <!-- .pagination -->

_includes/post-sharing.html

@@ -16,7 +16,7 @@
     {% for share in site.data.share.platforms %}
       {% assign link = share.link | replace: 'TITLE', title | replace: 'URL', url %}
         <a href="{{ link }}" data-toggle="tooltip" data-placement="top"
-          title="{{ share.type }}" target="_blank">
+          title="{{ share.type }}" target="_blank" rel="noopener" aria-label="{{ share.type }}">
           <i class="fa-fw {{ share.icon }}"></i>
         </a>
     {% endfor %}
@@ -25,4 +25,4 @@
         data-toggle="tooltip" data-placement="top" title="Copy link"></i>
 
   </span>
-</div>
+</div>

_includes/refactor-content.html

@@ -0,0 +1,27 @@
+<!--
+  Refactor the HTML structure.
+-->
+
+{% assign _content = include.content %}
+
+<!--
+  Suroundding the markdown table with '<div class="table-wrapper">. and '</div>'
+-->
+{% if _content contains '<table>' %}
+  {% assign _content = _content | replace: '<table>', '<div class="table-wrapper"><table>' %}
+  {% assign _content = _content | replace: '</table>', '</table></div>' %}
+  {% assign _content = _content | replace: '</table></div></code>', '</table></code>' %}
+{% endif %}
+
+
+<!--
+  Fixed kramdown code highlight rendering:
+  https://github.com/penibelst/jekyll-compress-html/issues/101
+  https://github.com/penibelst/jekyll-compress-html/issues/71#issuecomment-188144901
+-->
+{% if _content contains '<pre class="highlight">' %}
+  {% assign _content = _content | replace: '<div class="highlight"><pre class="highlight"><code', '<div class="highlight"><code' %}
+  {% assign _content = _content | replace: '</code></pre></div>', '</code></div>' %}
+{% endif %}
+
+{{ _content }}

_includes/related-posts.html

@@ -1,75 +1,110 @@
 <!--
- The related posts of current post.
- Placed in the bottom of every single post.
+ Recommend the other 3 posts according to the tags and categories of the current post,
+ if the number is not enough, use the other latest posts to supplement.
+
  v2.0
  https://github.com/cotes2020/jekyll-theme-chirpy
  © 2019 Cotes Chung
  Published under the MIT License
 -->
 
-{% assign MAX_SIZE = 3 %}
+<!-- The total size of related posts  -->
+{% assign TOTAL_SIZE = 3 %}
+
+<!-- An random integer that bigger than 0  -->
 {% assign TAG_SCORE = 1 %}
+
+<!-- Equals to TAG_SCORE / {max_categories_hierarchy}  -->
 {% assign CATEGORY_SCORE = 0.5 %}
 
+{% assign SEPARATOR = ":" %}
+
 {% assign score_list = "" | split: "" %}
-{% assign post_index = 0 %}
+{% assign last_index = site.posts.size | minus: 1 %}
 
-{% for post in site.posts %}
-  {% if post.url != page.url %}
-    {% assign score = 0 %}
-
-    {% for tag in post.tags %}
-      {% if page.tags contains tag %}
-        {% assign score = score | plus: TAG_SCORE %}
-      {% endif %}
-    {% endfor %}
-
-    {% for category in post.categories %}
-      {% if page.categories contains category %}
-        {% assign score = score | plus: CATEGORY_SCORE %}
-      {% endif %}
-    {% endfor %}
-
-    {% if score > 0 %}
-      {% capture score_item %}{{ score }}:{{ post_index }}{% endcapture %}
-      {% assign score_list = score_list | push: score_item %}
-    {% endif %}
+{% for i in (0..last_index) %}
+  {% assign post = site.posts[i] %}
 
+  {% if post.url == page.url %}
+    {% continue %}
   {% endif %}
-  {% assign post_index = post_index | plus: 1 %}
+
+  {% assign score = 0 %}
+
+  {% for tag in post.tags %}
+    {% if page.tags contains tag %}
+      {% assign score = score | plus: TAG_SCORE %}
+    {% endif %}
+  {% endfor %}
+
+  {% for category in post.categories %}
+    {% if page.categories contains category %}
+      {% assign score = score | plus: CATEGORY_SCORE %}
+    {% endif %}
+  {% endfor %}
+
+  {% if score > 0 %}
+    {% capture score_item %}{{ score }}{{ SEPARATOR }}{{ i }}{% endcapture %}
+    {% assign score_list = score_list | push: score_item %}
+  {% endif %}
+
 {% endfor %}
 
+
+{% assign index_list = "" | split: "" %}
+
 {% if score_list.size > 0 %}
   {% assign score_list = score_list | sort | reverse %}
-  {% assign count = 0 %}
-  <div id="related-posts" class="mt-4 mb-2 mb-sm-4 pb-2">
+  {% for entry in score_list limit: TOTAL_SIZE %}
+    {% assign index = entry | split: SEPARATOR | last %}
+    {% assign index_list = index_list | push: index %}
+  {% endfor %}
+{% endif %}
+
+<!-- Fill with the other newlest posts  -->
+{% assign less = TOTAL_SIZE | minus: index_list.size %}
+
+{% if less > 0 %}
+
+  {% for i in (0..last_index) %}
+    {% assign post = site.posts[i] %}
+    {% if post.url != page.url  %}
+      {% capture cur_index %}{{ i }}{% endcapture %}
+      {% unless index_list contains cur_index %}
+        {% assign index_list = index_list | push: cur_index %}
+        {% assign less = less | minus: 1 %}
+        {% if less <= 0 %}
+          {% break %}
+        {% endif %}
+      {% endunless %}
+    {% endif %}
+  {% endfor %}
+
+{% endif %}
+
+
+{% if index_list.size > 0 %}
+  <div id="related-posts" class="mt-5 mb-2 mb-sm-4">
     <h3 class="pt-2 mt-1 mb-4 ml-1" data-toc-skip>{{ site.data.label.post.relate_posts }}</h3>
     <div class="card-deck mb-4">
-    {% for score_item in score_list %}
-      {% assign data = score_item | split: ":" %}
-      {% assign index = data[1] | plus: 0 %}
+    {% for entry in index_list %}
+      {% assign index = entry | plus: 0 %}
       {% assign post = site.posts[index] %}
       <div class="card">
         <a href="{{ post.url | relative_url }}">
           <div class="card-body">
-            <span class="timeago small">
-                {{ post.date | date: site.data.date_format.post }}
-                <i class="unloaded">{{ post.date | date_to_xmlschema }}</i>
-            </span>
+            {% include timeago.html date=post.date class="small" %}
             <h3 class="pt-0 mt-1 mb-3" data-toc-skip>{{ post.title }}</h3>
             <div class="text-muted small">
-              {% assign content = post.content %}
-              {% include no-linenos.html %}
-              <p>{{ content | markdownify | strip_html | truncate: 200 | replace: '&', '&amp;' }}</p>
+              <p>
+                {% include no-linenos.html content=post.content %}
+                {{ content | markdownify | strip_html | truncate: 200 }}
+              </p>
             </div>
           </div>
         </a>
       </div>
-      {% assign count = count | plus: 1 %}
-      {% if count >= MAX_SIZE %}
-        {% break %}
-      {% endif %}
     {% endfor %}
     </div> <!-- .card-deck -->
-  </div>
-{% endif %}
+  </div> <!-- #related-posts -->
+{% endif %}

_includes/search-loader.html

@@ -5,7 +5,6 @@
   © 2017-2019 Cotes Chung
   MIT License
 -->
-<script src="https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.7.3/dest/simple-jekyll-search.min.js" integrity="sha256-qcLR00zq6pJk4je3MLgAri8Nn+ZumUlXgTKR2H/xCY0=" crossorigin="anonymous"></script>
 
 {% capture result_elem %}
 <div class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-lg-4 pr-lg-4 pl-xl-0 pr-xl-0">
@@ -20,11 +19,13 @@
 
 {% capture not_found %}<p class="mt-5">Oops! No result founds.</p>{% endcapture %}
 
+<script src="https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.7.3/dest/simple-jekyll-search.min.js"></script>
+
 <script>
 SimpleJekyllSearch({
   searchInput: document.getElementById('search-input'),
   resultsContainer: document.getElementById('search-results'),
-  json: '{{ site.baseurl }}/assets/data/search.json',
+  json: '{{ site.baseurl }}/assets/js/data/search.json',
   searchResultTemplate: '{{ result_elem | strip_newlines }}',
   noResultsText: '{{ not_found }}'
 });

_includes/search-results.html

@@ -9,11 +9,14 @@
   <div class="col-12 col-xl-11 post-content">
     <div id="search-hints">
       <h4 class="text-muted mb-4">{{ site.data.label.panel.trending_tags }}</h4>
+
       {% include trending-tags.html %}
+
       {% for tag in trending_tags %}
         {% capture url %}/tags/{{ tag | downcase | url_encode }}/{% endcapture %}
         <a class="post-tag" href="{{ url | relative_url }}">{{ tag | replace: '-', ' ' }}</a>
-       {% endfor %}
+      {% endfor %}
+
     </div>
     <div id="search-results" class="d-flex flex-wrap justify-content-center text-muted mt-3"></div>
   </div>

_includes/sidebar.html

@@ -7,6 +7,7 @@
 -->
 
 <div id="nav-wrapper">
+
   <div id="profile-wrapper" class="d-flex flex-column">
     <div id="avatar" class="d-flex justify-content-center">
       <a href="{{ site.baseurl }}/" alt="avatar">
@@ -15,41 +16,35 @@
         {% if start == '/' %}
           {% assign avatar_url = avatar_url | prepend: site.baseurl %}
         {% endif %}
-        <img src="{{ avatar_url }}" alt="avatar">
+        <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
       </a>
     </div>
 
     <div class="profile-text mt-3">
-      <div id="site-title">
-        <a href="{{ site.baseurl }}/">{{- site.title -}}</a>
+      <div class="site-title">
+        <a href="{{ '/' | relative_url }}">{{- site.title -}}</a>
       </div>
-      <div id="site-subtitle" class="font-italic">{{- site.tagline -}}</div>
+      <div class="site-subtitle font-italic">{{- site.tagline -}}</div>
     </div>
-  </div>
+  </div><!-- #profile-wrapper -->
 
   <ul class="nav flex-column">
-  {% assign page_urls = page.url | split: "/" %}
-
-  {% for item in site.data.tabs %}
-    {% assign ref = site.baseurl | append: "/" %}
-
-    {% if item.path %}
-      {% assign ref = ref | append: item.path | append: "/" %}
-      {% if item.url %}
-        {% assign ref = ref | append: item.url | append: "/" %}
-      {% endif %}
-    {% endif %}
-
-    <li class="nav-item d-flex justify-content-center
-      {% if item.url == page_urls.last
-        or item.name == page.tab_active
-        or item.name == "Home" and page.layout == "home" %}active{% endif %}">
-      <a href="{{ ref }}" class="nav-link d-flex justify-content-center align-items-center w-100">
-        <i class="fa-fw {{ item.icon }} ml-3 mr-3 unloaded"></i>
-        <span>{{ item.name | upcase }}</span>
+    <!-- home -->
+    <li class="nav-item d-flex justify-content-center {% if page.layout == 'home' %}active{% endif %}">
+      <a href="{{ '/' | relative_url }}" class="nav-link d-flex justify-content-center align-items-center w-100">
+        <i class="fa-fw fas fa-home ml-xl-3 mr-xl-3 unloaded"></i>
+        <span>{{ "HOME" }}</span>
+      </a>
+    </li>
+    <!-- the real tabs -->
+    {% for tab in site.tabs %}
+    <li class="nav-item d-flex justify-content-center {% if tab.url == page.url %}active{% endif %}">
+      <a href="{{ tab.url | relative_url }}" class="nav-link d-flex justify-content-center align-items-center w-100">
+        <i class="fa-fw {{ tab.icon }} ml-xl-3 mr-xl-3 unloaded"></i>
+        <span>{{ tab.title | upcase }}</span>
       </a>
     </li> <!-- .nav-item -->
-  {% endfor %}
+    {% endfor %}
 
   </ul> <!-- ul.nav.flex-column -->
 
@@ -64,18 +59,27 @@
   <span class="icon-border"></span>
   {% endif %}
 
-  <a href="https://github.com/{{ site.github.username }}" target="_blank">
-    <i class="fab fa-github-alt"></i>
-  </a>
-  <a href="https://twitter.com/{{ site.twitter.username }}" target="_blank">
-    <i class="fab fa-twitter"></i>
-  </a>
-  {% assign email = site.social.email | split: '@' %}
-  <a href="javascript:window.open('mailto:' + ['{{ email[0] }}','{{ email[1] }}'].join('@'))">
-    <i class="fas fa-envelope"></i>
-  </a>
-  <a href="{{ site.baseurl }}/feed.xml" target="_blank">
-    <i class="fas fa-rss"></i>
-  </a>
+  {% for entry in site.data.contact %}
+    {% capture url %}
+      {%- if entry.type == 'github' -%}
+        https://github.com/{{ site.github.username }}
+      {%- elsif entry.type == 'twitter' -%}
+        https://twitter.com/{{ site.twitter.username }}
+      {%- elsif entry.type == 'email' -%}
+        {% assign email = site.social.email | split: '@' %}
+        javascript:location.href = 'mailto:' + ['{{ email[0] }}','{{ email[1] }}'].join('@')
+      {%- elsif entry.type == 'rss' -%}
+        {{ "/feed.xml" | relative_url }}
+      {%- else -%}
+        {{ entry.url }}
+      {%- endif -%}
+    {% endcapture %}
 
-</div>
+    {% if url != '' %}
+    <a href="{{ url }}" aria-label="{{ entry.type }}" {% unless entry.noblank %}target="_blank" rel="noopener"{% endunless %}>
+      <i class="{{ entry.icon }}"></i>
+    </a>
+    {% endif %}
+  {% endfor %}
+
+</div>

_includes/timeago.html

@@ -0,0 +1,27 @@
+<!--
+  Date format snippet
+
+  v2.4.1
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT License
+-->
+<span class="timeago {% if include.class %}{{ include.class }}{% endif %}"
+  {% if include.tooltip %}
+    data-toggle="tooltip"
+    data-placement="bottom"
+    title="{{ include.date | date: site.data.date_format.tooltip }}"
+  {% endif %}>
+
+  {% assign this_year = site.time | date: "%Y" %}
+  {% assign post_year = include.date | date: "%Y" %}
+
+  {% if post_year == this_year %}
+    {{ include.date | date: site.data.date_format.post.short }}
+  {% else %}
+    {{ include.date | date: site.data.date_format.post.long }}
+  {% endif %}
+
+  <i class="unloaded">{{ include.date | date_to_xmlschema }}</i>
+
+</span>

_includes/topbar.html

@@ -29,22 +29,23 @@
     <i id="sidebar-trigger" class="fas fa-bars fa-fw"></i>
 
     <div id="topbar-title">
-    {% if page.location %}
-      {{- page.location -}}
-    {% elsif page.layout == "home" %}
-      {{- site.title -}}
-    {% else %}
-      {{- page.title -}}
-    {% endif %}
+      {% if page.layout == 'home' %}
+        {{- site.title -}}
+      {% elsif page.collection == 'tabs' %}
+        {{- page.title -}}
+      {% else %}
+        {{- page.layout | capitalize -}}
+      {% endif %}
     </div>
 
     <i id="search-trigger" class="fas fa-search fa-fw"></i>
     <span id="search-wrapper" class="align-items-center">
       <i class="fas fa-search fa-fw"></i>
-      <input class="form-control" id="search-input" type="search" placeholder="{{ site.data.label.search_hint }}...">
+      <input class="form-control" id="search-input" type="search"
+        aria-label="search" placeholder="{{ site.data.label.search_hint }}...">
       <i class="fa fa-times-circle fa-fw" id="search-cleaner"></i>
     </span>
     <span id="search-cancel" >Cancel</span>
   </div>
 
-</div>
+</div>

_includes/trending-tags.html

@@ -8,24 +8,33 @@
 
 {% assign MAX = 10 %}
 
-{% capture tags_array %}
-  {% for tag in site.tags %}
-    {{ tag[1] | size }}::{{ tag[0] | replace: ' ', '-' }}
-  {% endfor %}
-{% endcapture %}
+{% assign size_list = "" | split: "" %}
+{% assign tag_list = "" | split: "" %}
 
-{% assign all_tags = tags_array | split: " " | sort | reverse %}
-{% assign count = 0 %}
+{% for tag in site.tags %}
+  {% assign size = tag | last | size %}
+  {% assign size_list = size_list | push: size %}
+
+  {% assign tag_str = tag | first | replace: " ", "-" | append: "::" | append: size %}
+  {% assign tag_list =  tag_list | push: tag_str %}
+{% endfor %}
+
+{% assign size_list = size_list | sort | reverse %}
+
+{% assign tag_list = tag_list | sort_natural %}
 
 {% assign trending_tags = "" | split: "" %}
 
-{% for iter in all_tags %}
-  {% assign count = count | plus: 1 %}
-  {% assign tag = iter | split: "::" | last  %}
-
-  {% assign trending_tags = trending_tags | push: tag %}
-
-  {% if count >= MAX %}
-    {% break %}
-  {% endif %}
+{% for size in size_list limit: MAX %}
+  {% for tag_str in tag_list %}
+    {% assign tag = tag_str | split: "::" %}
+    {% assign tag_name = tag | first %}
+    {% assign tag_size = tag | last | plus: 0 %}
+    {% if tag_size == size %}
+      {% unless trending_tags contains tag_name %}
+        {% assign trending_tags = trending_tags | push: tag_name %}
+        {% break %}
+      {% endunless %}
+    {% endif %}
+  {% endfor %}
 {% endfor %}

_includes/update-list.html

@@ -0,0 +1,28 @@
+{% comment %}
+  Get the last 5 posts from lastmod list.
+  v2.2
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT License
+{% endcomment %}
+
+{% assign MAX_SIZE = 5 %}
+
+{% assign all_list = "" | split: "" %}
+
+{% for post in site.posts %}
+  {% if post.last_modified_at %}
+    {% capture elem %}
+      {{- post.last_modified_at | date: "%Y%m%d%H%M%S" -}}::{{- forloop.index0 -}}
+    {% endcapture %}
+    {% assign all_list = all_list | push: elem %}
+  {% endif %}
+{% endfor %}
+
+{% assign all_list = all_list | sort | reverse %}
+
+{% assign update_list = "" | split: "" %}
+
+{% for entry in all_list limit:MAX_SIZE %}
+  {% assign update_list = update_list | push: entry %}
+{% endfor %}

_includes/update_list.html

@@ -1,21 +0,0 @@
-{% comment %}
-  Get the last 5 post from lastmod list.
-  v2.2
-  https://github.com/cotes2020/jekyll-theme-chirpy
-  © 2020 Cotes Chung
-  MIT License
-{% endcomment %}
-
-{% assign MAX_SIZE = 5 %}
-{% assign sum = 0 %}
-{% assign update_list = "" | split: "" %}
-
-{% for entry in site.data.updates %}
-  {% capture elem %}
-    {{- entry.lastmod -}}::{{- entry.filename -}}
-  {% endcapture %}
-
-  {% assign update_list = update_list | push: elem %}
-{% endfor %}
-
-{% assign update_list = update_list | sort | reverse %}

_layouts/category.html

@@ -10,16 +10,16 @@ layout: page
   <h1 class="pl-lg-2">
     <i class="far fa-folder-open fa-fw text-muted"></i>
     {{ page.title }}
-    <span class="lead text-muted pl-2">{{ site.categories[page.category] | size }}</span>
+    <span class="lead text-muted pl-2">{{ page.posts | size }}</span>
   </h1>
 
   <ul class="post-content pl-0">
-    {% for post in site.categories[page.category] %}
+    {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
-      <a href="{{ post.url | absolute_url }}">{{ post.title }}</a>
+      <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: site.data.date_format.post }}</span>
+      <span class="text-muted small">{{ post.date | date: site.data.date_format.post.long }}</span>
     </li>
     {% endfor %}
   </ul>
-</div>
+</div>

_layouts/default.html

@@ -9,13 +9,19 @@ layout: compress
 
 <!DOCTYPE html>
 
+{% if site.lang %}
+  {% assign lang = site.lang | split: "_" | first %}
+{% else %}
+  {% assign lang = 'en' %}
+{% endif %}
+
 {% capture prefer_mode %}
   {% if site.theme_mode != "dual" %}
     mode="{{ site.theme_mode }}"
   {% endif %}
 {% endcapture %}
 
-<html lang="en" {{ prefer_mode }} >
+<html lang="{{ lang }}" {{ prefer_mode }} >
 
   {% include head.html %}
 
@@ -30,31 +36,28 @@ layout: compress
     <div id="main-wrapper">
       <div id="main">
 
-        {% capture _content %}
-          {{ content }}
-        {% endcapture %}
-
-        {% include fixlinenos.html %}
-        {{ _content }}
+        {% include refactor-content.html content=content %}
 
         {% include footer.html %}
+
       </div>
+
       {% include search-results.html %}
 
     </div> <!-- #main-wrapper -->
 
     <div id="mask"></div>
 
-    <a id="back-to-top" href="#" class="btn btn-lg btn-box-shadow" role="button">
+    <a id="back-to-top" href="#" aria-label="back-to-top" class="btn btn-lg btn-box-shadow" role="button">
       <i class="fas fa-angle-up"></i>
     </a>
 
-    {% if jekyll.environment == 'production' %}
+    {% include search-loader.html %}
+
+    {% if site.google_analytics.id and jekyll.environment == 'production' %}
       {% include google-analytics.html %}
     {% endif %}
 
-    {% include search-loader.html %}
-
   </body>
 
-</html>
+</html>

_layouts/home.html

@@ -7,28 +7,67 @@ layout: page
 # MIT Licensed
 ---
 
+
+{% assign pinned = site.posts | where_exp: "item", "item.pin == true"  %}
+{% assign default = site.posts | where_exp: "item", "item.pin != true"  %}
+{% assign posts = "" | split: "" %}
+
+<!-- Get pinned posts -->
+
+{% assign offset = paginator.page | minus: 1 | times: paginator.per_page %}
+{% assign pinned_num = pinned.size | minus: offset %}
+
+{% if pinned_num > 0 %}
+  {% for i in (offset..pinned.size) limit: pinned_num %}
+    {% assign posts = posts | push: pinned[i] %}
+  {% endfor %}
+{% else %}
+  {% assign pinned_num = 0 %}
+{% endif %}
+
+
+<!-- Get default posts -->
+
+{% assign default_beg = offset | minus: pinned.size %}
+
+{% if default_beg < 0 %}
+  {% assign default_beg = 0 %}
+{% endif %}
+
+{% assign default_num = paginator.posts | size | minus: pinned_num  %}
+{% assign default_end = default_beg | plus: default_num | minus: 1 %}
+
+{% if default_num > 0 %}
+  {% for i in (default_beg..default_end) %}
+    {% assign posts = posts | push: default[i] %}
+  {% endfor %}
+{% endif %}
+
+
 <div id="post-list">
-  {% for post in paginator.posts %}
+
+{% for post in posts %}
+
   <div class="post-preview">
-    <h1>
-      <a href="{{ site.baseurl }}{{ post.url }}">{{ post.title }}</a>
-    </h1>
+    <div class="d-flex justify-content-between pr-xl-2">
+      <h1><a href="{{ post.url | relative_url }}">{{ post.title }}</a></h1>
+      {% if post.pin == true %}
+        <i class="fas fa-thumbtack fa-fw text-muted mt-1 ml-2 mt-xl-2" data-toggle="tooltip" data-placement="left"
+        title="Pinned"></i>
+      {% endif %}
+    </div>
     <div class="post-content">
       <p>
-      {% assign _content = post.content %}
-      {% include no-linenos.html %}
-      {{ _content | markdownify | strip_html | truncate: 200 }}
+        {% include no-linenos.html content=post.content %}
+        {{ content | markdownify | strip_html | truncate: 200 }}
       </p>
     </div>
 
     <div class="post-meta text-muted">
       <!-- posted date -->
       <i class="far fa-clock fa-fw"></i>
-      <span class="timeago" data-toggle="tooltip" data-placement="bottom"
-        title="{{ post.date | date: site.data.date_format.tooltip }}">
-      {{ post.date | date: site.data.date_format.post }}
-      <i class="unloaded">{{ post.date | date_to_xmlschema }}</i>
-      </span>
+      {% include timeago.html date=post.date tooltip=true %}
+
       <!-- page views -->
       {% if site.google_analytics.pv.enabled %}
       <i class="far fa-eye fa-fw"></i>
@@ -38,7 +77,9 @@ layout: page
       {% endif %}
     </div>
   </div> <!-- .post-review -->
-  {% endfor %}
+
+{% endfor %}
+
 </div> <!-- #post-list -->
 
 {% if paginator.total_pages > 0 %}

_layouts/post.html

@@ -19,37 +19,22 @@ layout: default
         <!-- Published date and author -->
         <div>
           Posted
-          <span class="timeago" data-toggle="tooltip" data-placement="bottom"
-           title="{{ page.date | date: site.data.date_format.tooltip }}">
-            {{ page.date | date: site.data.date_format.post }}
-            <i class="unloaded">{{ page.date | date_to_xmlschema }}</i>
-          </span>
+          {% include timeago.html date=page.date tooltip=true %}
           by
           <span class="author">
           {% if page.author %}
             {{ page.author }}
-          {% else%}
+          {% else %}
             {{ site.author }}
           {% endif %}
           </span>
         </div>
 
         <!-- lastmod -->
-        {%- capture filename -%}
-          {{ page.url | split: "/" | last }}
-        {%- endcapture -%}
-
-        {% assign record = site.data.updates | where: "filename", filename | first %}
-
-        {% if record %}
+        {% if page.last_modified_at %}
         <div>
           Updated
-          <span class="timeago lastmod"
-            data-toggle="tooltip" data-placement="bottom"
-             title="{{ record.lastmod | date: site.data.date_format.tooltip }}">
-            {{ record.lastmod | date: site.data.date_format.post }}
-            <i class="unloaded">{{ record.lastmod | date_to_xmlschema}}</i>
-          </span>
+          {% include timeago.html date=page.last_modified_at class="lastmod" tooltip=true %}
         </div>
         {% endif %}
 
@@ -64,13 +49,21 @@ layout: default
       </div> <!-- .post-meta -->
 
       <div class="post-content">
+        {%- capture img_placehodler -%}
+          data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
+        {% endcapture%}
 
         {% if page.image %}
-          <img src="{{ page.image }}">
+          <img src="{{ img_placehodler }}" data-src="{{ page.image }}" class="post-preview-img">
         {% endif %}
 
-        {{ content }}
-
+        <!-- Using lozad. See: <https://github.com/ApoorvSaxena/lozad.js#usage> -->
+        {% if content contains '<img src=' %}
+          {% assign replacement = '<img src="' | append: img_placehodler | append: '" data-src=' %}
+          {{ content | replace: '<img src=', replacement }}
+        {% else %}
+          {{ content }}
+        {% endif %}
       </div>
 
       <div class="post-tail-wrapper text-muted">
@@ -100,7 +93,7 @@ layout: default
         {% endif %}
 
         <div class="post-tail-bottom
-          d-flex justify-content-between align-items-center pt-5 pb-2">
+          d-flex justify-content-between align-items-center mt-3 pt-5 pb-2">
           {% if site.data.rights.license %}
           <div class="license-wrapper">
             This post is licensed under
@@ -117,6 +110,7 @@ layout: default
 
     </div> <!-- .post -->
 
+
   </div> <!-- #post-wrapper -->
 
   {% include panel.html %}
@@ -124,21 +118,20 @@ layout: default
 </div> <!-- .row -->
 
 <div class="row">
-  <div id="post-extend-wrapper" class="col-12 col-lg-11 col-xl-8">
+  <div class="col-12 col-lg-11 col-xl-8">
+    <div id="post-extend-wrapper" class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
 
-    <div class="pl-1 pr-1 pl-sm-2 pr-sm-2 pl-md-4 pr-md-4">
+    {% include related-posts.html %}
 
-      {% include post-nav.html %}
+    {% include post-nav.html %}
 
-      {% if site.disqus.comments and page.comments %}
-        {% include disqus.html %}
-      {% endif %}
+    {% if site.disqus.comments and page.comments %}
+      {% include disqus.html %}
+    {% endif %}
 
-      {% include related-posts.html %}
+    </div> <!-- #post-extend-wrapper -->
 
-    </div> <!-- .pl-1 pr-1 -->
-
-  </div> <!-- #post-extend-wrapper -->
+  </div> <!-- .col-* -->
 
 </div> <!-- .row -->
 

_layouts/tag.html

@@ -11,15 +11,15 @@ layout: page
   <h1 class="pl-lg-2">
     <i class="fa fa-tag fa-fw text-muted"></i>
     {{ page.title }}
-    <span class="lead text-muted pl-2">{{ site.tags[page.tag] | size }}</span>
+    <span class="lead text-muted pl-2">{{ page.posts | size }}</span>
   </h1>
   <ul class="post-content pl-0">
-    {% for post in site.tags[page.tag] %}
+    {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
-      <a href="{{ post.url | absolute_url }}">{{ post.title }}</a>
+      <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: site.data.date_format.post }}</span>
+      <span class="text-muted small">{{ post.date | date: site.data.date_format.post.long }}</span>
     </li>
     {% endfor %}
   </ul>
-</div>
+</div>

_plugins/posts-lastmod-hook.rb

@@ -0,0 +1,11 @@
+# Check for changed posts
+Jekyll::Hooks.register :posts, :post_init do |post|
+
+  commit_num = `git rev-list --count HEAD "#{ post.path }"`
+
+  if commit_num.to_i > 1
+    lastmod_date = `git log -1 --pretty="%ad" --date=iso "#{ post.path }"`
+    post.data['last_modified_at'] = lastmod_date
+  end
+
+end

_posts/2019-08-08-text-and-typography.md

@@ -4,22 +4,26 @@ author: Cotes Chung
 date: 2019-08-08 11:33:00 +0800
 categories: [Blogging, Demo]
 tags: [typography]
+math: true
+image: /assets/img/sample/devices-mockup.png
 ---
 
-This Jekyll template totally compatible with Markdown syntax. Now, let's take a look for the text and typography in this theme.
+This post is to show Markdown syntax rendering on [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork), you can also use it as an example of writing. Now, let's start looking at text and typography.
+
 
 ## Titles
 
-***
+---
+
 # H1
 
 <h2 data-toc-skip>H2</h2>
 
 <h3 data-toc-skip>H3</h3>
 
-#### H4
+<h4>H4</h4>
 
-***
+---
 
 ## Paragraph
 
@@ -35,21 +39,37 @@ Beside the lake, beneath the trees,
 
 Fluttering and dancing in the breeze.
 
+## List
+
+### Ordered list
+
+1. first item
+2. second item
+3. third item
+
+### Unordered list
+
+- item 1
+	- sub item 1
+	- sub item 2
+
+- item 2
+
 ## Block Quote
 
 > This line to shows the Block Quote.
 
 ## Tables
 
-|Company|Contact|Country|
-|:---|:--|---:|
-|Alfreds Futterkiste | Maria Anders | Germany
-|Island Trading | Helen Bennett | UK
-|Magazzini Alimentari Riuniti | Giovanni Rovelli | Italy
+| Company                      | contact          | Country |
+|:-----------------------------|:-----------------|--------:|
+| Alfreds Futterkiste          | Maria Anders     | Germany |
+| Island Trading               | Helen Bennett    | UK      |
+| Magazzini Alimentari Riuniti | Giovanni Rovelli | Italy   |
 
 ## Link
 
-[http://127.0.0.1:4000](http://127.0.0.1:4000)
+<http://127.0.0.1:4000>
 
 
 ## Footnote
@@ -57,15 +77,47 @@ Fluttering and dancing in the breeze.
 Click the hook will locate the footnote[^footnote].
 
 
-## Image
+## Images
 
-![Desktop View]({{ "/assets/img/sample/mockup.png" | relative_url }})
+By default, the image is centered and the image caption can be displayed at the bottom:
 
+![Desktop View](/assets/img/sample/mockup.png)
+_Full screen width and center alignment_
+
+You can change the size of the picture:
+
+![Desktop View](/assets/img/sample/mockup.png){: width="400"}
+_400px image width_
+
+In addition, you can use class `normal` , `left` and `right` to specify the image position (but in these case, the image caption is prohibited), for example:
+
+- Normal position
+  
+  ![Desktop View](/assets/img/sample/mockup.png){: width="350" class="normal"}
+
+- Float to the left
+
+  ![Desktop View](/assets/img/sample/mockup.png){: width="240" class="left"}
+  "A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space."
+
+- Float to the right
+
+  ![Desktop View](/assets/img/sample/mockup.png){: width="240" class="right"}
+  "A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space. A repetitive and meaningless text is used to fill the space."
 
 ## Inline code
 
 This is an example of `Inline Code`.
 
+## Mathematics
+
+The mathematics powered by [**MathJax**](https://www.mathjax.org/):
+
+$$ \sum_{n=1}^\infty 1/n^2 = \frac{\pi^2}{6} $$
+
+When \\(a \ne 0\\), there are two solutions to \\(ax^2 + bx + c = 0\\) and they are
+
+$$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$
 
 ## Code Snippet
 

_posts/2019-08-08-write-a-new-post.md

@@ -8,7 +8,7 @@ tags: [writing]
 
 ## Naming and Path
 
-Create a new file named with the format `YYYY-MM-DD-title.md` then put it into `_post` of the root directory.
+Create a new file named `YYYY-MM-DD-TITLE.EXTENSION` and put it in the `_post/` of the root directory. Please note that the `EXTENSION` must be one of `md` and `markdown`. From `v2.4.1`, you can create sub-directories under `_posts/` to categorize posts.
 
 ## Front Matter
 
@@ -31,69 +31,16 @@ In order to accurately record the release date of a post, you should not only se
 
 ### Categories and Tags
 
-The `categories` of each post is designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity.
+The `categories` of each post is designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity. For instance:
 
-The list of posts belonging to the same category/tag is recorded on a separate page. The number of such *category*/*tag* type pages is equal to the number of `categories`/`tags` for all posts, they must match perfectly. 
-
-let's say there is a post with front matter:
 ```yaml
 categories: [Animal, Insect]
-tags: bee
+tags: [bee]
 ```
 
-then we should have two *category* type pages placed in folder `categories` of root and one *tag* type page placed in folder `tags`  of root:
-
-```terminal
-jekyll-theme-chirpy
-├── categories
-│   ├── animal.html
-│   └── insect.html
-├── tags
-│   └── bee.html
-...
-```
-    
-and the content of a *category* type page is
-
-```yaml
----
-layout: category
-title: CATEGORY_NAME        # e.g. Insect
-category: CATEGORY_NAME     # e.g. Insect
----
-```
-
-the content of a *tag* type page is
-
-```yaml
----
-layout: tag
-title: TAG_NAME             # e.g. bee
-tag: TAG_NAME               # e.g. bee
----
-```
-
-With the increasing number of posts, the number of categories and tags will increase several times!  If we still manually create these *category*/*tag* type files, it will obviously be a super time-consuming job, and it is very likely to miss some of them(i.e. when you click on the missing `category` or `tag` link from a post or somewhere, it will complain to you '404'). The good news is that we got a lovely script tool `_scripts/sh/create_pages.sh` to finish the boring task. Basically we will use it via `tools/init.sh` instead of running it separately. Check out its use case [here]({{ "/posts/getting-started/#option-1-built-by-github-pages" | relative_url }}).
-
-## Last modified date
-    
-The last modified date of a post is obtained according to its latest git commit date, and all the modified date of the posts should be stored in `_data/updates.yml`. For example:
-
-```yaml
--
-  filename: getting-started             # the post filename without date and extension
-  lastmod: 2020-04-13 00:38:56 +0800    # the post last modified date
--
-  ... 
-```
-
-You can choose to create this file manually, but as you may notice, the better approach is to let it be automatically generated by a tool script. And `_scripts/sh/dump_lastmod.py` was born for this! Similar to the another script `_scripts/sh/create_pages.sh` mentioned above, it is also be called from `tools/init.sh`, so it doesn't have to be used separately.
-
-When some posts have been modified since their published date and also the file `_data/updates.yml` was created correctly, a list with the label **Recent Updates** will be displayed in the right panel of the desktop view, which records the five most recently modified articles.
-
 ## Table of Contents
 
-By default, the **T**able **o**f **C**ontents (TOC) is displayed on the right panel of the post. If you want to turn it off globally, go to `_config.yml` and set the variable `toc` to `false`. If you want to turn off TOC for specific post, add the following to post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
+By default, the **T**able **o**f **C**ontents (TOC) is displayed on the right panel of the post. If you want to turn it off globally, go to `_config.yml` and set the value of variable `toc` to `false`. If you want to turn off TOC for specific post, add the following to post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
 
 ```yaml
 ---
@@ -101,7 +48,6 @@ toc: false
 ---
 ```
 
-
 ## Comments
 
 Similar to TOC, the [Disqus](https://disqus.com/) comments is loaded by default in each post, and the global switch is defined by variable `comments` in file `_config.yml` . If you want to close the comment for specific post, add the following to the **Front Matter** of the post:
@@ -112,6 +58,35 @@ comments: false
 ---
 ```
 
+## Mathematics
+
+For website performance reasons, the mathematical feature won't be loaded by default. But it can be enabled by:
+
+```yaml
+---
+math: true
+---
+```
+
+## Preview Image
+
+If you want to add an image to the top of the post contents, specify the url for the image by:
+
+```yaml
+---
+image: /path/to/image-file
+---
+```
+
+## Pinned Posts
+
+You can pin one or more posts to the top of the home page, and the fixed posts are sorted in reverse order according to their release date. Enable by:
+
+```yaml
+---
+pin: true
+---
+```
 
 ## Code Block
 
@@ -123,7 +98,7 @@ This is a common code snippet, without syntax highlight and line number.
 
 ## Specific Language
 
-Using <code class="highlighter-rouge">```Language</code> you will get code snippets with line Numbers and syntax highlight.
+Using <code class="highlighter-rouge">```language</code> you will get code snippets with line numbers and syntax highlight.
 
 > **Note**: The Jekyll style `{% raw %}{%{% endraw %} highlight LANGUAGE {% raw %}%}{% endraw %}` or `{% raw %}{%{% endraw %} highlight LANGUAGE linenos {% raw %}%}{% endraw %}` are not allowed to be used in this theme !
 
@@ -136,7 +111,7 @@ items:
       quantity:  4
 ```
 
-#### Liquid codes
+### Liquid Codes
 
 If you want to display the **Liquid** snippet, surround the liquid code with `{% raw %}{%{% endraw %} raw {%raw%}%}{%endraw%}` and `{% raw %}{%{% endraw %} endraw {%raw%}%}{%endraw%}` .
 
@@ -149,5 +124,6 @@ If you want to display the **Liquid** snippet, surround the liquid code with `{%
 {% endraw %}
 
 ## Learn More
+
 For more knowledge about Jekyll posts, visit the [Jekyll Docs: Posts](https://jekyllrb.com/docs/posts/).
 

_posts/2019-08-09-getting-started.md

@@ -4,200 +4,128 @@ author: Cotes Chung
 date: 2019-08-09 20:55:00 +0800
 categories: [Blogging, Tutorial]
 tags: [getting started]
+pin: true
 ---
 
-## Prerequisites
 
-Follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installtion of basic environment (`Ruby `, `RubyGems` and `Bundler`). 
+## Installation
 
-To improve the writing experience, we need to use some script tools. If your machine is running Debian or macOS, make sure that [GNU coreutils](https://www.gnu.org/software/coreutils/) is installed. Otherwise, install by:
+[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) on GitHub, rename the repository to `USERNAME.github.io` (where `USERNAME` is your GitHub username), and then open terminal and clone the fork to local by:
 
-* Debian
-
-```console
-$ sudo apt-get install coreutils
+```terminal
+$ git clone https://github.com/USERNAME/USERNAME.github.io.git -b master --single-branch
 ```
 
-* macOS
+### Setting up the local envrionment
 
-```console
-$ brew install coreutils
-```
+If you would like to run or build the project on your local machine, please follow the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll` and `Bundler`. 
 
-
-## Jekyll Plugins
-
-[Fork **Chirpy** from GitHub](https://github.com/cotes2020/jekyll-theme-chirpy/fork), then clone your forked repo to local:
-
-```console
-$ git clone git@github.com:USER/jekyll-theme-chirpy.git -b master
-```
-
-and replace the `USER` above to your GitHub username.
-
-The first time you run or build the project on local machine, perform the installation of Jekyll plugins. Go to the root of repo and run:
+Before running or building for the first time, please complete the installation of the Jekyll plugins. Go to the root directory of project and run:
 
 ```terminal
 $ bundle install
 ```
 
-`bundle` will automatically install all the dependent Jekyll Plugins that listed in the `Gemfile`.
+`bundle` will automatically install all the dependencies specified by `Gemfile`.
 
+### Setting up Docker environment (optional)
 
-## Directory Structure
+If you're a loyal fan of [**Docker**](https://www.docker.com/) or just too lazy to install the packages mentioned in [_Setting up the local envrionment_](#setting-up-the-local-envrionment), please make sure you have **Docker Engine** installed and running, and then get Docker image `jekyll/jekyll` from Docker Hub by the following command:
 
-The main files and related brief introductions are listed below.
-
-```sh
-jekyll-theme-chirpy/
-├── _data
-├── _includes      
-├── _layouts
-├── _posts          # posts stay here
-├── _scripts
-├── .travis.yml     # remove it
-├── .github         # remove this, too
-├── assets      
-├── tabs
-│   └── about.md    # the ABOUT page
-├── .gitignore
-├── 404.html
-├── Gemfile
-├── LICENSE
-├── README.md
-├── _config.yml     # configuration file
-├── tools           # script tools
-├── feed.xml
-├── index.html
-├── robots.txt
-└── sitemap.xml
+```console
+$ docker pull jekyll/jekyll
 ```
 
+## Usage
 
-As mentioned above, some files or directories should be removed from your repo:
+### Initialization
 
-- .travis.yml
-- .github
-
-
-## Configuration
-
-Generally, go to `_config.yml` and configure the variables as needed. Some of them are typical options:
-
-* `url`
-    
-    Set to your website url and there should be no slash symbol at the tail. Format: `<protocol>://<domain>`.
-
-
-* `avatar`
-    
-    It defines the image file location of avatar. The sample image is `/assets/img/sample/avatar.jpg`, and should be replaced by your own one(a square image). Notice that a huge image file will increase the load time of your site, so keep your avatar image size as samll as possible(may be *<https://tinypng.com/>* will help).
-
-* `timezone`
-
-    To ensure that the posts' release date matches the city you live in, please modify the field `timezone` correctly. A list of all available values can be found on [TimezoneConverter](http://www.timezoneconverter.com/cgi-bin/findzone/findzone) or [Wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).
-
-* `theme_mode`
-  
-    There are three options for the theme color scheme:
-    
-    - **dual**  - The default color scheme will follow the system settings, but if the system does not support dark mode, or the browser does not support `Media Queries Level 5`, the theme will be displayed as `light` mode by default. Anyway, the bottom left corner of the Sidebar will provide a button for users to switch color schemes.
-
-    - **dark**  - Always show dark mode.
-    - **light** - Always show light mode.
-
-
-##  Run Locally
-
-You may want to preview the site content before publishing, so just run the script tool:
-
-```terminal
-$ bash tools/run.sh
-```
-
-Open a brower and visit <http://localhost:4000>.
-
-Few days later, you may find that the file changes does not refresh in real time by using `run.sh`. Don't worry, the advanced option `-r` (or `--realtime`) will solve this problem, but it requires [**fswatch**](http://emcrisostomo.github.io/fswatch/) to be installed on your machine.
-
-##  Deploying to GitHub Pages
-
-Before the deployment begins, checkout the file `_config.yml` and make sure that the `url` has been configured. What's more, if you prefer the [Project site on GitHub](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and also use the default domain `<username>.github.io`, remember to change the `baseurl` to your project name that starting with a slash. For example, `/project`.
-
-
-### Option 1: Built by GitHub Pages
-
-By deploying the site in this way, you're allowed to push the source code directly to the remote.
-
-> **Note**: If you want to use any third-party Jekyll plugins that not in [this list](https://pages.github.com/versions/), stop reading the current approach and go to [*Option 2: Build locally*](#option-2-build-locally).
-
-**1**. Rename the repository to:
-
-|Site Type | Repo's Name|
-|:---|:---|
-|User or Organization | `<username>.github.io`|
-|Project| Any one except `<username>.github.io`, let's say `project`|
-
-**2**. Commit the changes of the repo first, then run the initialization script:
+Go to the root directory of the project and start initialization:
 
 ```console
 $ bash tools/init.sh
 ```
 
-> Please note that the *Recent Update* list requires the latest git-log date of posts, thus make sure the changes in `_posts` have been committed before running this command.
+> **Note**: If you not intend to deploy it on GitHub Pages, append parameter option `--no-gh` at the end of the above command.
 
-it will automatically generates the *Latest Modified Date* and *Categories / Tags* page for the posts and submit a commit. Its output is similar to the following log:
+What it does is:
+
+1. Remove some files or directories from your repository:
+
+    - `.travis.yml`
+    - files under `_posts`
+    - folder `docs`
+
+2. If you use the `--no-gh` option, the directory `.github` will be deleted. Otherwise, setup the GitHub Action workflow by removing extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in folder `.github`. 
+
+3. Automatically create a commit to save the changes.
+
+### Configuration
+
+Generally, go to `_config.yml` and configure the variables as needed. Some of them are typical options:
+
+- `url`
+- `avatar`
+- `timezone`
+- `theme_mode`
+
+### Run Locally
+
+You may want to preview the site contents before publishing, so just run it by:
 
 ```terminal
-[INFO] Success to update lastmod for 4 post(s).
-[INFO] Succeed! 3 category-pages created.
-[INFO] Succeed! 4 tag-pages created.
-[Automation] Updated the Categories, Tags, Lastmod for post(s).
- 11 files changed, 46 insertions(+), 3 deletions(-)
- ...
-Updated the Categories, Tags, Lastmod for post(s).
+$ bundle exec jekyll s
+```
+
+Then open a browser and visit to <http://localhost:4000>.
+
+### Run on Docker
+
+Run the site on Docker with the following command:
+
+```terminal
+$ docker run --rm -it \
+    --volume="$PWD:/srv/jekyll" \
+    -p 4000:4000 jekyll/jekyll \
+    jekyll serve
 ```
 
 
-**3**. Push the changes to `origin/master` then go to GitHub website and enable GitHub Pages service for the repo.
+### Deployment
 
-**4**. Check it out:
+Before the deployment begins, checkout the file `_config.yml` and make sure the `url` is configured correctly. Furthermore, if you prefer the [_project site_](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites) and don't use a custom domain, or you want to visit your website with a base url on a web server other than **GitHub Pages**, remember to change the `baseurl` to your project name that starting with a slash. For example, `/project`.
 
-|Site Type | Site URL |
-|:---|:---|
-|User or Organization | `https://<username>.github.io/`|
-|Project| `https://<username>.github.io/project/`|
+Assuming you have already gone through the [initialization](#initialization), you can now choose ONE of the following methods to deploy your website.
 
+#### Deploy on GitHub Pages
 
-### Option 2: Build Locally
+For security reasons, GitHub Pages build runs on `safe` mode, which restricts us from using plugins to generate additional page files. Therefore, we can use **GitHub Actions** to build the site, store the built site files on a new branch, and use that branch as the source of the Pages service.
 
-For security reasons, GitHub Pages runs on `safe` mode, which means the third-party Jekyll plugins or custom scripts won't work. If you want to use any another plugins that not in the [whitelist](https://pages.github.com/versions/), **you have to generate the site locally rather than on GitHub Pages**.
+1. Push any commit to `origin/master` to trigger the GitHub Actions workflow. Once the build is complete and successful, a new remote branch named `gh-pages` will appear to store the built site files.
 
-**1**. Browse to GitHub website, create a brand new repo named: 
+2. Browse to your repo's landing page on GitHub and select the branch `gh-pages` as the [publishing source](https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site) throught _Settings_ → _Options_ → _GitHub Pages_:
+    ![gh-pages-sources](/assets/img/sample/gh-pages-sources.png){: width="650" class="normal"}
 
-|Site Type | Repo's Name|
-|:---|:---|
-|User or Organization | `<username>.github.io`|
-|Project| Any one except `<username>.github.io`, let's say `project`|
+3. Visit your website at the address indicated by GitHub.
 
-and clone it.
+#### Deploy on Other Platforms
 
-**2**. In the root of the source project, build your site by:
+On platforms other than GitHub, we cannot enjoy the convenience of **GitHub Actions**. Therefore, we should build the site locally (or on some other 3rd-party CI platform) and then put the site files on the server.
+
+Go to the root of the source project, build your site by:
 
 ```console
-$ bash tools/build.sh -d /path/to/local/project/
+$ JEKYLL_ENV=production bundle exec jekyll b
 ```
 
-The generated static files will be placed in the root of `/path/to/local/project`. Commit and push the changes to the `master` branch on GitHub.
+Or, build the site with Docker by:
 
-**3**. Go to GitHub website and enable Pages service for the new repository.
+```terminal
+$ docker run -it --rm \
+    --env JEKYLL_ENV=production \
+    --volume="$PWD:/srv/jekyll" \
+    jekyll/jekyll \
+    jekyll build
+```
 
-**4**. Visit at:
-
-|Site Type | Site URL |
-|:---|:---|
-|User or Organization | `https://<username>.github.io/`|
-|Project| `https://<username>.github.io/project/`|
-
-### Finishing work
-
-No matter which way you choose to deploy the website on GitHub, please enforce the `HTTPS` for it. See official docs: [Configuring a publishing source for your GitHub Pages site](https://help.github.com/en/github/working-with-github-pages/securing-your-github-pages-site-with-https).
+Unless you specified the output path, the generated site files will be placed in folder `_site` of the project's root directory. Now you should upload those files to your web server.

_posts/2019-08-11-customize-the-favicon.md

@@ -9,19 +9,31 @@ toc: false
 
 In [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/), the image files of [Favicons](https://www.favicon-generator.org/about/) are placed in `assets/img/favicons/`. You may need to replace them with your own. So let's see how to customize these Favicons.
 
-Whit a square image (PNG, JPG or GIF) in hand, open the site [*Favicon & App Icon Generator*](https://www.favicon-generator.org/) and upload your original image.
+With a square image (PNG, JPG or GIF) in hand, open the site [*Favicon & App Icon Generator*](https://www.favicon-generator.org/) and upload your original image.
 
-![upload-image]({{ "/assets/img/sample/upload-image.png" | relative_url }})
+![upload-image](/assets/img/sample/upload-image.png)
 
 Click button <kbd>Create Favicon</kbd> and wait a moment for the website to generate the icons of various sizes automatically.
 
-![download-icons]({{ "/assets/img/sample/download-icons.png" | relative_url }})
+![download-icons](/assets/img/sample/download-icons.png){: width="600"}
 
 Download the generated package, unzip and delete the following two from the extracted files:
 
 - browserconfig.xml
 - manifest.json
  
-Now, copy the rest image files (`.PNG` and `.ICO`) to cover the original one in folder `assets/img/favicons/`.
+Now, copy the remaining image files (`.PNG` and `.ICO`) from the extracted `.zip` file to cover the original files in the folder `assets/img/favicons/`.
 
-Lastly, don't forget to rebuild your site so that the icon becomes your custom edition.
+The following table helps you understand the changes to the icon file:
+
+> ✓ means keep, ✗ means delete.
+
+| File(s)             | From Favicon & App Icon Generator | From Chirpy |
+|---------------------|:---------------------------------:|:-----------:|
+| `*.PNG`             | ✓                                 | ✗           |
+| `*.ICO`             | ✓                                 | ✗           |
+| `browserconfig.xml` | ✗                                 | ✓           |
+| `manifest.json`     | ✗                                 | ✓           |
+
+
+The next time you build the site, the icon will be replaced with a customized edition.

_scripts/sh/create_pages.sh

@@ -1,154 +0,0 @@
-#!/usr/local/bin/bash
-#
-# Create HTML pages for Categories and Tags in posts.
-#
-# Usage:
-#     Call from the '_posts' sibling directory.
-#
-# v2.2
-# https://github.com/cotes2020/jekyll-theme-chirpy
-# © 2020 Cotes Chung
-# Published under MIT License
-
-set -eu
-
-TYPE_CATEGORY=0
-TYPE_TAG=1
-
-category_count=0
-tag_count=0
-
-
-_read_yaml() {
-  local _endline=$(grep -n "\-\-\-" $1 | cut -d: -f 1 | sed -n '2p')
-  head -$_endline $1
-}
-
-
-read_categories() {
-  local _yaml=$(_read_yaml $1)
-  local _categories=$(echo "$_yaml" | grep "^categories:")
-  local _category=$(echo "$_yaml" | grep "^category:")
-
-  if [[ ! -z "$_categories" ]]; then
-    echo "$_categories" | sed "s/categories: *//;s/\[//;s/\]//;s/, */,/g;s/\"//g;s/'//g"
-  elif [[ ! -z "_category" ]]; then
-    echo "$_category" | sed "s/category: *//;s/\[//;s/\]//;s/, */,/g;s/\"//g;s/'//g"
-  fi
-}
-
-
-read_tags() {
-  local _yaml=$(_read_yaml $1)
-  echo "$_yaml" | grep "^tags:" | sed "s/tags: *//;s/\[//;s/\]//;s/, */,/g;s/\"//g;s/'//g"
-}
-
-
-init() {
-  if [[ -d categories ]]; then
-    rm -rf categories
-  fi
-
-  if [[ -d tags ]]; then
-    rm -rf tags
-  fi
-
-  mkdir categories tags
-}
-
-
-create_category() {
-  local _name=$1
-  local _filepath="categories/$(echo $_name | sed 's/ /-/g' | awk '{print tolower($0)}').html"
-
-  if [[ ! -f $_filepath ]]; then
-    echo "---" > $_filepath
-    echo "layout: category" >> $_filepath
-    echo "title: $_name" >> $_filepath
-    echo "category: $_name" >> $_filepath
-    echo "---" >> $_filepath
-
-    ((category_count=category_count+1))
-  fi
-}
-
-
-create_tag() {
-  local _name=$1
-  local _filepath="tags/$( echo $_name | sed "s/ /-/g;s/'//g" | awk '{print tolower($0)}' ).html"
-
-  if [[ ! -f $_filepath ]]; then
-
-    echo "---" > $_filepath
-    echo "layout: tag" >> $_filepath
-    echo "title: $_name" >> $_filepath
-    echo "tag: $_name" >> $_filepath
-    echo "---" >> $_filepath
-
-    ((tag_count=tag_count+1))
-  fi
-}
-
-
-#########################################
-# Create HTML pages for Categories/Tags.
-# Arguments:
-#   $1 - an array string
-#   $2 - type specified option
-#########################################
-create_pages() {
-  if [[ $1 == '' ]]; then
-    exit 0
-  fi
-
-  # split string to array
-  IFS_BAK=$IFS
-  IFS=','
-  local _string=$1
-
-  case $2 in
-
-    $TYPE_CATEGORY)
-      for i in ${_string#,}; do
-        create_category $i
-      done
-      ;;
-
-    $TYPE_TAG)
-      for i in ${_string#,}; do
-        create_tag $i
-      done
-      ;;
-
-    *)
-      ;;
-
-    esac
-
-    IFS=$IFS_BAK
-  }
-
-
-main() {
-  init
-
-  for _file in $(ls "_posts")
-  do
-    local _path="_posts/$_file"
-    local _categories=$(read_categories "$_path")
-    local _tags=$(read_tags "$_path")
-
-    create_pages "$_categories" $TYPE_CATEGORY
-    create_pages "$_tags" $TYPE_TAG
-  done
-
-  if [[ $category_count -gt 0 ]]; then
-    echo "[INFO] Succeed! $category_count category-pages created."
-  fi
-
-  if [[ $tag_count -gt 0 ]]; then
-    echo "[INFO] Succeed! $tag_count tag-pages created."
-  fi
-}
-
-main

_scripts/sh/dump_lastmod.sh

@@ -1,89 +0,0 @@
-#!/bin/bash
-#
-# Find out the posts that have been modified and record
-# its lastmod information to file '_data/updates.yml'
-#
-# Usage:
-#     Call from the '_posts' sibling directory.
-#
-# v2.2
-# https://github.com/cotes2020/jekyll-theme-chirpy
-# © 2020 Cotes Chung
-# Published under MIT License
-
-set -eu
-
-POST_DIR=_posts
-OUTPUT_DIR=_data
-OUTPUT_FILE=updates.yml
-
-
-_init() {
-  if [[ ! -d "$OUTPUT_DIR" ]]; then
-    mkdir "$OUTPUT_DIR"
-  fi
-
-  if [[ -f "$OUTPUT_DIR/$OUTPUT_FILE" ]]; then
-    rm -f "$OUTPUT_DIR/$OUTPUT_FILE"
-  fi
-
-  touch "$OUTPUT_DIR/$OUTPUT_FILE"
-}
-
-
-_has_changed() {
-  local _log_count=`git log --pretty=%ad $1 | wc -l | sed 's/ *//'`
-  _log_count=$(($_log_count + 0))
-
-  if [[ $_log_count > 1 ]]; then
-    return 0 # true
-  fi
-
-  return 1 # false
-}
-
-
-###################################
-# Storage the posts' lastmod.
-#
-# Args:
-#     - $1 the post's filename
-#     - $2 the post's filepath
-# Output:
-#     the file '_data/updates.yml'
-###################################
-_dump() {
-  local _lasmod="`git log -1 --pretty=%ad --date=iso $2`"
-
-  echo "-" >> "$OUTPUT_DIR/$OUTPUT_FILE"
-  echo "  filename: '$1'" >> "$OUTPUT_DIR/$OUTPUT_FILE"
-  echo "  lastmod: '$_lasmod'" >> "$OUTPUT_DIR/$OUTPUT_FILE"
-}
-
-
-main() {
-
-  _init
-
-  local _count=0
-
-  for _file in $(ls -r "$POST_DIR")
-  do
-    _filepath="$POST_DIR/$_file"
-    _filename="${_file%.*}"     # jekyll cannot read the extension of a file, so omit it.
-    _filename=${_filename:11}   # remove the date
-
-    if _has_changed "$_filepath"; then
-      _dump "$_filename" "$_filepath"
-      ((_count=_count+1))
-    fi
-
-  done
-
-  if [[ $_count > 0 ]]; then
-    echo "[INFO] Success to update lastmod for $_count post(s)."
-  fi
-}
-
-
-main

_scripts/sh/sync_monitor.sh

@@ -1,38 +0,0 @@
-#!/bin/bash
-
-# Files sync monitoer
-# v2.0
-# https://github.com/cotes2020/jekyll-theme-chirpy
-# © 2019 Cotes Chung
-# MIT Licensed
-
-# $1 -> the origin file with absolute path.
-# $2 -> the origin sync directory
-# $3 -> the destination sync direcotry
-
-# Omit the system temp file
-if [[ ! -f $1 ]]; then
-  exit 0
-fi
-
-src_dir=`dirname $(realpath $1)`
-
-dir_prefix="$(realpath $2)/"
-
-related_dir="${src_dir:${#dir_prefix}}"
-
-
-dest="$(realpath $3)/${related_dir}"
-
-if [[ ! -d "$dest" ]]; then
-  mkdir -p "$dest"
-fi
-
-if [[ -f "$1" ]]; then
-  cp $1 $dest
-fi
-
-if [[ $related_dir == "_posts" ]]; then
-  bash $3/_scripts/sh/create_pages.sh
-  bash $3/_scripts/sh/dump_lastmod.sh
-fi

_tabs/about.md

@@ -1,5 +1,7 @@
 ---
 title: About
+icon: fas fa-info
+order: 4
 
 # The About page
 # v2.0
@@ -8,4 +10,5 @@ title: About
 # MIT License
 ---
 
-> **Note**: Add Markdown syntax content to file `tabs/about.md` and it will show up on this page.
+
+> **Note**: Add Markdown syntax content to file `_tabs/about.md` and it will show up on this page.

_tabs/archives.md

@@ -1,5 +1,7 @@
 ---
 title: Archives
+icon: fas fa-archive
+order: 3
 
 # The Archives of posts.
 # v2.0
@@ -24,7 +26,7 @@ title: Archives
         {% capture this_month %}{{ post.date | date: "%b" }}{% endcapture %}
         <span class="date day">{{ this_day }}</span>
         <span class="date month small text-muted">{{ this_month }}</span>
-        <a href="{{ site.baseurl }}{{ post.url }}">{{ post.title }}</a>
+        <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       </div>
     </li>
   {% if forloop.last %}
@@ -37,4 +39,4 @@ title: Archives
     {% assign last_month = "" %}
   {% endif %}
 {% endfor %}
-</div>
+</div>

_tabs/categories.md

@@ -1,5 +1,7 @@
 ---
 title: Categories
+icon: fas fa-stream
+order: 1
 
 # All the Categories of posts
 # v2.0
@@ -8,6 +10,11 @@ title: Categories
 # MIT License
 ---
 
+{% assign HEAD_PREFIX = "h_" %}
+{% assign LIST_PREFIX = "l_" %}
+
+{% assign group_index = 0 %}
+
 {% assign sort_categories = site.categories | sort %}
 
 {% for category in sort_categories %}
@@ -20,9 +27,11 @@ title: Categories
 
     {% for post in posts_of_category %}
       {% assign second_category = post.categories[1] %}
-      {% unless sub_categories contains second_category %}
-        {% assign sub_categories = sub_categories | push: second_category %}
-      {% endunless %}
+      {% if second_category %}
+        {% unless sub_categories contains second_category %}
+          {% assign sub_categories = sub_categories | push: second_category %}
+        {% endunless %}
+      {% endif %}
     {% endfor %}
 
     {% assign sub_categories = sub_categories | sort %}
@@ -30,7 +39,8 @@ title: Categories
 
   <div class="card categories">
     <!-- top-category -->
-    <div class="card-header d-flex justify-content-between hide-border-bottom" id="h_{{ category_name }}">
+    <div class="card-header d-flex justify-content-between hide-border-bottom"
+        id="{{ HEAD_PREFIX }}{{ group_index }}">
       <span>
       {% if sub_categories_size > 0 %}
         <i class="far fa-folder-open fa-fw"></i>
@@ -38,33 +48,40 @@ title: Categories
         <i class="far fa-folder fa-fw"></i>
       {% endif %}
         <a href="{{ site.baseurl }}/categories/{{ category_name | replace: ' ', '-' | downcase | url_encode }}/"
-          class="ml-1 mr-2">{{ category_name }}</a>
+          class="ml-1 mr-2">
+          {{ category_name }}
+        </a>
+
         <!-- content count -->
         {% assign top_posts_size = site.categories[category_name] | size %}
         <span class="text-muted small font-weight-light">
-        {% if sub_categories_size > 0 %}
-          {{ sub_categories_size }}
-          {% if sub_categories_size > 1 %}categories{% else %}category{% endif %},
-        {% endif %}
-          {{ top_posts_size }}
-          post{% if top_posts_size > 1 %}s{% endif %}
+          {% if sub_categories_size > 0 %}
+            {{ sub_categories_size }}
+            {% if sub_categories_size > 1 %}categories{% else %}category{% endif %},
+          {% endif %}
+            {{ top_posts_size }}
+            post{% if top_posts_size > 1 %}s{% endif %}
         </span>
       </span>
 
       <!-- arrow -->
-      <a href="#l_{{ category_name }}" data-toggle="collapse" aria-expanded="true" class="category-trigger hide-border-bottom">
-        {% if sub_categories_size > 0%}
+      {% if sub_categories_size > 0%}
+      <a href="#{{ LIST_PREFIX }}{{ group_index }}" data-toggle="collapse" 
+        aria-expanded="true" aria-label="{{ HEAD_PREFIX }}{{ group_index }}-trigger" 
+        class="category-trigger hide-border-bottom">
         <i class="fas fa-fw fa-angle-down"></i>
-        {% else %}
-        <i class="fas fa-fw fa-angle-right disabled"></i>
-        {% endif %}
       </a>
+      {% else %}
+      <span data-toggle="collapse" class="category-trigger hide-border-bottom disabled">
+        <i class="fas fa-fw fa-angle-right"></i>
+      </span>
+      {% endif %}
 
     </div> <!-- .card-header -->
 
     <!-- Sub-categories -->
     {% if sub_categories_size > 0 %}
-    <div id="l_{{ category_name }}" class="collapse show" aria-expanded="true">
+    <div id="{{ LIST_PREFIX }}{{ group_index }}" class="collapse show" aria-expanded="true">
       <ul class="list-group">
         {% for sub_category in sub_categories %}
         <li class="list-group-item">
@@ -83,7 +100,7 @@ title: Categories
 
   </div> <!-- .card -->
 
+    {% assign group_index = group_index | plus: 1 %}
+
   {% endif %}
 {% endfor %}
-
-<script src="{{ site.baseurl }}/assets/js/dist/category-collapse.min.js" async></script>

_tabs/tags.md

@@ -1,5 +1,7 @@
 ---
 title: Tags
+icon: fas fa-tags
+order: 2
 
 # All the Tags of posts.
 # v2.0

assets/css/_addon/fonts.scss

@@ -2,7 +2,6 @@
  * The field 'font-display' is added for Google-fonts.
  *
  * See: <https://fonts.google.com/>
- *
  */
 
-@import url('https://fonts.googleapis.com/css?family=Lato|Roboto+Condensed:400,700|Source+Sans+Pro:400,600,700,900&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Lato&family=Roboto+Condensed:wght@400;700&family=Source+Sans+Pro:wght@400;600;700;900&display=swap');

assets/css/_addon/main.scss

@@ -64,7 +64,7 @@ body {
 
 /*--- sidebar layout ---*/
 
-$tab-count: {{ site.data.tabs | size }};
+$tab-count: {{ site.tabs | size | plus: 1 }}; // plus 1 for home tab
 
 $sidebar-display: "sidebar-display";
 
@@ -77,19 +77,41 @@ $sidebar-display: "sidebar-display";
   overflow-y: auto;
   width: $sidebar-width-medium;
   z-index: 99;
-  background: rgb(42, 30, 107);
   background: var(--sidebar-bg);
   a {
     @include sidebar-links;
   }
+
+  .site-title {
+    text-align: center;
+    a {
+      font-weight: 900;
+      font-size: 1.5rem;
+      letter-spacing: 0.5px;
+      &:hover {
+        color: #fff;
+        text-decoration: none;
+      }
+    }
+  }
+
+  .site-subtitle {
+    font-size: 95%;
+    text-align: center;
+    color: #828282;
+    line-height: 1.2rem;
+    word-spacing: 1px;
+    margin: 0.5rem 1.5rem 2rem 1.5rem;
+  }
+
   .sidebar-bottom {
-    .icon-border+a { // the icon behide mode-toggle
-      margin-left: .1rem;
+    .icon-border + a { // the icon behide mode-toggle
+      margin-left: 0.1rem;
     }
   }
   .nav-link {
     border-radius: 0;
-    font-size: .95rem;
+    font-size: 0.95rem;
     font-weight: 600;
     letter-spacing: 1px;
   }
@@ -111,8 +133,8 @@ $sidebar-display: "sidebar-display";
     display: -webkit-box;
     display: -ms-flexbox;
 
-    >li:last-child {
-      >a {
+    > li:last-child {
+      > a {
         margin-right: -3px;
         max-width: calc(100% - 3px);
       }
@@ -138,15 +160,15 @@ $sidebar-display: "sidebar-display";
       $top: -$offset * $tab-height + $tab-cursor-height / 2;
 
       @if $i < $tab-count {
-        >li.active:nth-child(#{$i}),
-        >li.nav-item:nth-child(#{$i}):hover {
+        > li.active:nth-child(#{$i}),
+        > li.nav-item:nth-child(#{$i}):hover {
           ~li:last-child::after {
             @include fix-cursor($top);
           }
         }
       } @else {
-        >li.active:nth-child(#{$i}):last-child::after,
-        >li.nav-item:nth-child(#{$i}):last-child:hover::after {
+        > li.active:nth-child(#{$i}):last-child::after,
+        > li.nav-item:nth-child(#{$i}):last-child:hover::after {
           @include fix-cursor($top);
         }
       }
@@ -159,10 +181,10 @@ $sidebar-display: "sidebar-display";
     font-size: 1.2rem;
     margin: 2rem 2.5rem 1.6rem;
     a {
-      margin-bottom: .5rem; // icons may have multi lines
+      margin-bottom: 0.5rem; // icons may have multi lines
     }
 
-    a:hover, #mode-toggle-wrapper>i:hover {
+    a:hover, #mode-toggle-wrapper > i:hover {
       color: #fff;
     }
 
@@ -182,13 +204,13 @@ $sidebar-display: "sidebar-display";
       width: 3px;
       height: 3px;
       border-radius: 50%;
-      margin-top: .75rem;
+      margin-top: 0.75rem;
     }
   }
 } // #sidebar
 
 @media (hover: hover) {
-  #sidebar ul>li:last-child::after {
+  #sidebar ul > li:last-child::after {
     -webkit-transition: top .5s ease;
     -moz-transition: top .5s ease;
     -o-transition: top .5s ease;
@@ -206,7 +228,7 @@ $sidebar-display: "sidebar-display";
 }
 
 #avatar {
-  >a {
+  > a {
     display: block;
     width: 6rem;
     height: 6rem;
@@ -219,7 +241,7 @@ $sidebar-display: "sidebar-display";
     transition: border-color 0.35s ease-in-out;
   }
 
-  &:hover>a {
+  &:hover > a {
     border-color: #fff;
   }
 
@@ -239,29 +261,6 @@ $sidebar-display: "sidebar-display";
   }
 } // #avatar
 
-#site-title {
-  text-align: center;
-  a {
-    // color: var(--site-title-color);
-    font-weight: 900;
-    font-size: 1.5rem;
-    letter-spacing: .5px;
-    &:hover {
-      color: #fff;
-      text-decoration: none;
-    }
-  }
-}
-
-#site-subtitle {
-  font-size: 95%;
-  text-align: center;
-  color: #828282;
-  line-height: 1.2rem;
-  word-spacing: 1px;
-  margin: .5rem 1.5rem 2rem 1.5rem;
-}
-
 #search-result-wrapper {
   display: none;
   position: fixed;
@@ -296,7 +295,7 @@ $sidebar-display: "sidebar-display";
 #breadcrumb {
   font-size: 1rem;
   color: gray;
-  padding-left: .5rem;
+  padding-left: 0.5rem;
   a:hover {
     @extend %link-hover;
   }
@@ -324,7 +323,7 @@ $sidebar-display: "sidebar-display";
   padding: 0 .5rem;
   i {
     z-index: 2;
-    font-size: .9rem;
+    font-size: 0.9rem;
     color: var(--search-icon-color);
   }
   .fa-times-circle { /* button 'clean up' */
@@ -342,7 +341,7 @@ $sidebar-display: "sidebar-display";
   background: center;
   border: 0;
   border-radius: 0;
-  padding: .18rem .3rem;
+  padding: 0.18rem .3rem;
   color: var(--text-color);
 }
 
@@ -367,12 +366,12 @@ $sidebar-display: "sidebar-display";
     font-size: 1rem;
     background: var(--search-tag-bg);
     border: none;
-    padding: .5rem;
+    padding: 0.5rem;
     margin: 0 1rem 1rem 0;
     &::before {
       content: "#";
       color: var(--text-muted-color);
-      padding-right: .2rem;
+      padding-right: 0.2rem;
     }
   }
 }
@@ -389,17 +388,17 @@ $sidebar-display: "sidebar-display";
       @extend %link-hover;
     }
   }
-  >div {
+  > div {
     max-width: 100%;
     &:not(:last-child) {
       margin-bottom: 1rem;
     }
     i { // icons
       color: #818182;
-      margin-right: .15rem;
+      margin-right: 0.15rem;
       font-size: 80%;
     }
-    >p {
+    > p {
       overflow: hidden;
       text-overflow: ellipsis;
       display: -webkit-box;
@@ -448,7 +447,7 @@ $sidebar-display: "sidebar-display";
   @include pl-pr(0);
 }
 
-#main>div.row:first-child>div {
+#main > div.row:first-child > div {
   &:nth-child(1), &:nth-child(2) {
     margin-top: $topbar-height; /* same as the height of topbar */
   }
@@ -461,11 +460,6 @@ $sidebar-display: "sidebar-display";
 #post-wrapper {
   min-height: calc(100vh - #{$topbar-height}
     - #{$footer-height} - #{$post-extend-min-height})!important;
-  .post-content {
-    a:hover {
-      @extend %link-hover;
-    }
-  }
 }
 
 #topbar-wrapper.row,
@@ -482,19 +476,18 @@ footer {
   font-size: 0.8rem;
   color: #7a7b7d;
   background-color: var(--footer-bg-color);
-  >div.d-flex {
+  > div.d-flex {
     line-height: 1.2rem;
     width: 95%;
     max-width: 1045px;
     border-top: 1px solid var(--main-border-color);
     margin-bottom: 1rem;
-    >div {
+    > div {
       width: 350px;
     }
   }
   a {
-    @include semi-bold;
-    color: var(---footer-link);
+    color: var(--footer-link);
     &:link {
       @include no-text-decoration;
     }
@@ -523,29 +516,24 @@ footer {
   &.topbar-down {
     top: 6rem;
   }
-  >div {
+  > div {
     padding-left: 1rem;
     border-left: 1px solid var(--main-border-color);
     &:not(:last-child) {
       margin-bottom: 4rem;
     }
   }
-  h3 {
-    padding-top: .5rem;
-    padding-bottom: .5rem;
-    margin-top: 0;
-    margin-bottom: 0;
-    letter-spacing: -0.02em;
-    @include label(inherit, 600);
+  span {
+    @include panel-label;
   }
   .post-content {
-    font-size: .9rem;
+    font-size: 0.9rem;
   }
 }
 
 
 #access-tags {
-  >div.post-content>div {
+  > div.post-content > div {
     max-width: 80%;
   }
   .post-tag {
@@ -554,8 +542,8 @@ footer {
     font-size: 0.85rem;
     background: none;
     border: 1px solid var(--btn-border-color);
-    border-radius: .8rem;
-    padding: .3rem .5rem;
+    border-radius: 0.8rem;
+    padding: 0.3rem .5rem;
     margin: 0 .35rem .5rem 0;
     &:hover {
       background-color: #2a408e;
@@ -568,7 +556,7 @@ footer {
 
 #access-lastmod {
   ul {
-    >li {
+    > li {
       height: 1.8rem;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -663,21 +651,25 @@ kbd {
 }
 
 sup {
-  @extend %anchor;
+  z-index: 1;
+  &:target {
+    @extend %anchor;
+    z-index: 0;
+  }
 }
 
 .footnotes ol {
-  margin-top: .5rem;
-  >li {
-    padding-top: .2rem;
+  margin-top: 0.5rem;
+  > li {
+    padding-top: 0.2rem;
     margin-top: -0.2rem;
-    >p {
-      padding-left: .2em;
+    > p {
+      padding-left: 0.2em;
     }
     &:not(:last-child) {
       margin-bottom: -.8rem;
     }
-    &:target>p {
+    &:target > p {
       background-color: var(--footnote-target-bg);
       width: fit-content;
       -webkit-transition: background-color 1.5s ease-in-out;
@@ -694,7 +686,7 @@ sup {
     -webkit-transition: background-color 1.5s ease-in-out; /* Safari prior 6.1 */
     transition: background-color 1.5s ease-in-out;
   }
-  @at-root sup:target>a#{&} {
+  @at-root sup:target > a#{&} {
     background-color: var(--footnote-target-bg);
     padding: 0 2px;
   }
@@ -702,11 +694,11 @@ sup {
 
 .reversefootnote {
   @at-root a#{&} {
-    font-size: .6rem;
+    font-size: 0.6rem;
     position: absolute;
     line-height: 1;
-    padding-top: .5em;
-    margin-left: .5em;
+    padding-top: 0.5em;
+    margin-left: 0.5em;
     border-bottom-style: none !important;
   }
 }
@@ -735,12 +727,17 @@ a {
 
 } // a
 
+img {
+  max-width: 100%;
+}
+
 .post {
   h1 {
     margin-top: 3rem;
+    margin-bottom: 1rem;
   }
   em { /* MarkDown italic */
-    padding-right: .2rem;
+    padding-right: 0.2rem;
   }
   a:hover {
     code {
@@ -751,41 +748,41 @@ a {
 
 
 /*--- Begin of Markdown table style ---*/
+div.post-content .table-wrapper {
+  overflow-x: auto;
 
-div.post-content {
-  >table, li>table {
+  > table {
     min-width: 60%;
-    border-collapse: collapse;
+    overflow-x: auto;
     border-spacing: 0;
     margin-bottom: 1.5rem;
+
+    thead {
+      border-bottom: solid 2px rgba(210, 215, 217, 0.75);
+      th {
+        @extend %table-cell;
+      }
+    }
+
+    tbody {
+      tr {
+        &:nth-child(2n) {
+          background-color: var(--tb-even-bg);
+        }
+        &:nth-child(2n + 1) {
+          background-color: var(--tb-odd-bg);
+        }
+        & {
+          border-bottom: 1px solid var(--tb-border-color);
+        }
+        td {
+          @extend %table-cell;
+        }
+      }
+    }
   }
 }
 
-table {
-  thead {
-    border-bottom: solid 2px rgba(210, 215, 217, 0.75);
-    +tbody tr {
-      &:nth-child(2n) {
-        background-color: var(--tb-even-bg);
-      }
-      &:nth-child(2n + 1) {
-        background-color: var(--tb-odd-bg);
-      }
-      & {
-        border-bottom: 1px solid var(--tb-border-color);
-      }
-    }
-    th {
-      @extend %table-cell;
-    }
-  }
-
-  tbody td {
-    @extend %table-cell;
-  }
-
-} // table
-
 
 /*--- post ---*/
 
@@ -813,16 +810,61 @@ table {
   margin-top: 2rem;
   overflow-wrap: break-word;
   word-wrap: break-word;
-  a {
-    @extend %link-color;
-    @extend %link-underline;
-    &:hover {
-      @extend %link-hover;
+
+  @mixin img($caption: false) {
+    > img:not([style]) {
+      margin: 0.5rem 0;
+
+      &:not(.normal):not(.left):not(.right) {
+        @include align-center;
+
+        @if $caption {
+          @include img-caption;
+        }
+      }
+
+      &.left {
+        float: left;
+        margin: 0.75rem 1rem 1rem 0;
+      }
+
+      &.right {
+        float: right;
+        margin: 0.75rem 0 1rem 1rem;
+      }
+
     }
   }
+
+  @mixin img-caption {
+    + em {
+      display: block;
+      text-align: center;
+      font-style: normal;
+      font-size: 80%;
+      padding: 0;
+      color: #6d6c6c;
+    }
+  }
+
+  a {
+    &:not(.img-hyperlink) {
+      @extend %link-color;
+      @extend %link-underline;
+      &:hover {
+        @extend %link-hover;
+      }
+    }
+    &.img-hyperlink {
+      @include img;
+      @include img-caption;
+    }
+  }
+
   p {
     font-size: 1.08rem;
-  }
+    @include img(true);
+  }// p
 }
 
 .tag:hover {
@@ -834,12 +876,12 @@ table {
   min-width: 2rem;
   text-align: center;
   background: var(--tag-bg);
-  border-radius: .3rem;
+  border-radius: 0.3rem;
   padding: 0 .4rem;
   color: inherit;
   line-height: 1.3rem;
   &:not(:last-child) {
-    margin-right: .2rem;
+    margin-right: 0.2rem;
   }
 
   &:hover {
@@ -900,7 +942,7 @@ table {
 }
 
 .tooltip-inner { /* Overrided BS4 Tooltip */
-  font-size: .7rem;
+  font-size: 0.7rem;
   max-width: 220px;
   text-align: left;
 }
@@ -928,7 +970,7 @@ table {
 
   $footer-height: 6rem; // overwrite
 
-  #main>div.row:first-child>div:first-child {
+  #main > div.row:first-child > div:first-child {
     min-height: calc(100vh - #{$topbar-height} - #{$footer-height});
   }
 
@@ -941,17 +983,17 @@ table {
     }
   }
 
-  #avatar>a {
+  #avatar > a {
     width: 5rem;
     height: 5rem;
   }
 
-  #site-subtitle {
+  .site-subtitle {
     @include ml-mr(1.8rem);
   }
 
   /* table text in small screens */
-  div>table, p~table {
+  div > table, p ~ table {
     width: 100%;
     table-layout: fixed;
     word-wrap: break-word;
@@ -963,10 +1005,10 @@ table {
 
   footer {
     height: $footer-height;
-    >div.d-flex {
+    > div.d-flex {
       width: 100%;
       padding: 1.5rem 0;
-      margin-bottom: .3rem;
+      margin-bottom: 0.3rem;
       flex-wrap: wrap;
       justify-content: left!important;
       -ms-flex-pack: distribute!important;
@@ -1051,8 +1093,8 @@ table {
     top: 0 !important;
   }
 
-  #main>div.row:first-child>div:nth-child(1),
-  #main>div.row:first-child>div:nth-child(2) {
+  #main > div.row:first-child > div:nth-child(1),
+  #main > div.row:first-child > div:nth-child(2) {
     margin-top: 0;
   }
 
@@ -1063,7 +1105,7 @@ table {
   }
 
   #search-wrapper {
-    &.loaded~a {
+    &.loaded ~ a {
       margin-right: 1rem;
     }
     .fa-times-circle {
@@ -1091,11 +1133,11 @@ table {
     justify-content: center!important;
   }
 
-  sup {
+  sup:target {
     padding-top: 3.4rem;
   }
 
-  .footnotes ol>li {
+  .footnotes ol > li {
     padding-top: 3.5rem;
     margin-top: -4.3rem;
     &:first-child {
@@ -1106,7 +1148,7 @@ table {
 
 
 @media all and (min-width: 577px) and (max-width: 1199px) {
-  footer>.d-flex>div {
+  footer>.d-flex > div {
     width: 312px;
   }
 }
@@ -1147,7 +1189,7 @@ table {
     text-align: left;
   }
 
-  footer>div.d-flex {
+  footer > div.d-flex {
     width: 92%;
   }
 
@@ -1184,16 +1226,16 @@ table {
     width: calc(100% - 210px);
   }
 
-  #search-results>div {
+  #search-results > div {
     max-width: 700px;
   }
 
-  #site-title {
+  .site-title {
     font-size: 1.3rem;
     margin-left: 0!important;
   }
 
-  #site-subtitle {
+  .site-subtitle {
     font-size: 90%;
     @include ml-mr(1rem);
   }
@@ -1222,7 +1264,7 @@ table {
     padding: 0;
   }
 
-  #main>div.row {
+  #main > div.row {
     -webkit-box-pack: center!important;
     -ms-flex-pack: center!important;
     justify-content: center!important;
@@ -1234,7 +1276,7 @@ table {
 
 @media all and (min-width: 1200px) {
 
-  #main>div.row>div.col-xl-8 {
+  #main > div.row > div.col-xl-8 {
     -webkit-box-flex: 0;
     -ms-flex: 0 0 75%;
     flex: 0 0 75%;
@@ -1265,7 +1307,7 @@ table {
     width: calc(100% - 260px);
   }
 
-  #search-results>div {
+  #search-results > div {
     max-width: 46%;
     &:nth-child(odd) {
       margin-right: 1.5rem;
@@ -1283,7 +1325,7 @@ table {
     font-size: 1.03rem;
   }
 
-  footer>div.d-felx {
+  footer > div.d-felx {
     width: 85%;
   }
 
@@ -1291,16 +1333,16 @@ table {
 
 @media all and (min-width: 1400px) {
 
-  #main>div.row {
+  #main > div.row {
     padding-left: calc((100% - #{$main-content-max-width}) / 2);
-    >div.col-xl-8 {
+    > div.col-xl-8 {
       max-width: 850px;
     }
   }
 
   #search-result-wrapper {
     padding-right: 2rem;
-    >div {
+    > div {
       max-width: 1110px;
     }
   }
@@ -1323,10 +1365,10 @@ table {
     padding-left: 0;
   }
 
-  #main>div.row>div.col-xl-8 {
+  #main > div.row > div.col-xl-8 {
     padding-left: 0;
-    >div:first-child {
-      padding-left: .55rem !important;
+    > div:first-child {
+      padding-left: 0.55rem !important;
       padding-right: 1.9rem !important;
     }
   }
@@ -1352,57 +1394,55 @@ table {
   }
 
   #profile-wrapper {
-    margin-top: 4rem;
-    margin-bottom: 3rem;
-    padding-left: 18%;
+    margin: 4rem 2rem 3rem 4rem;
     -ms-flex-direction: column!important;
-  }
 
-  #avatar {
-    -webkit-box-pack: normal !important;
-    -ms-flex-pack: normal !important;
-    justify-content: normal !important;
-    >a {
-      width: 6.2rem;
-      height: 6.2rem;
+    #avatar {
+      -webkit-box-pack: normal !important;
+      -ms-flex-pack: normal !important;
+      justify-content: normal !important;
+      > a {
+        width: 6.2rem;
+        height: 6.2rem;
+      }
     }
-  }
 
-  .profile-text {
-    padding-left: .5rem;
-    /* .d-flex */
-    display: -webkit-box!important;
-    display: -ms-flexbox!important;
-    display: flex!important;
-    /* .flex-wrap */
-    -ms-flex-wrap: wrap!important;
-    flex-wrap: wrap!important;
-    /* .align-content-center */
-    -ms-flex-line-pack: center!important;
-    align-content: center!important;
-  }
-
-  #site-title a {
-    font-size: 1.7rem;
-    letter-spacing: 1px;
-  }
-
-  .profile-text>div {
-    text-align: left !important;
-    width: 100%;
-  }
-
-  #site-subtitle {
-    word-spacing: 0;
-    padding-right: 3rem;
-    margin: .3rem 0 0 0;
+    .profile-text {
+      margin-left: 0.5rem;
+      /* .d-flex */
+      display: -webkit-box!important;
+      display: -ms-flexbox!important;
+      display: flex!important;
+      /* .flex-wrap */
+      -ms-flex-wrap: wrap!important;
+      flex-wrap: wrap!important;
+      /* .align-content-center */
+      -ms-flex-line-pack: center!important;
+      align-content: center!important;
+      > div {
+        text-align: left !important;
+        width: 100%;
+      }
+    }
   }
 
   #sidebar {
     width: $sidebar-width-large;
+
+    .site-title a {
+      font-size: 1.7rem;
+      letter-spacing: 1px;
+      margin: 0;
+    }
+
+    .site-subtitle {
+      word-spacing: 0;
+      margin: 0.3rem 0 0 0;
+    }
+
     ul {
-      margin-left: 5%;
-      >li>a {
+      margin-left: 3%;
+      > li > a {
         padding-left: 2.5rem;
         -webkit-box-pack: start!important;
         -ms-flex-pack: start!important;
@@ -1411,14 +1451,14 @@ table {
     }
 
     .nav-link {
-      >span {
+      > span {
         letter-spacing: 3px;
       }
-      >i {
+      > i {
         @include icon-round(1.65rem);
         line-height: 1rem;
-        font-size: .6rem;
-        padding: .5em 0 0 .1em;
+        font-size: 0.6rem;
+        padding: 0.5em 0 0 .1em;
         display: inline-block!important;
       }
     }
@@ -1437,44 +1477,43 @@ table {
         i {
           text-align: center;
           width: 1.25em;
-          padding-top: .44rem;
+          padding-top: 0.44rem;
         }
       }
 
       #mode-toggle-wrapper {
-        font-size: .9rem;
+        font-size: 0.9rem;
         i {
           @include icon-round(2rem);
-          padding-top: .44rem;
+          padding-top: 0.44rem;
           bottom: 0;
         }
       }
 
       .icon-border {
         @include ml-mr(.2rem);
-        margin-top: .85rem;
+        margin-top: 0.85rem;
         +a {
           margin-left: 0;
         }
       }
-
     } // .sidebar-bottom
   } // #sidebar
-
-  footer>div.d-flex {
+  footer > div.d-flex {
     width: 87%;
     max-width: 1140px;
   }
 
   #search-result-wrapper {
     width: calc(100% - #{$sidebar-width-large});
-    >div {
+    > div {
       max-width: #{$main-content-max-width};
     }
   }
 
 } // min-width: 1650px
 
+
 @media all and (min-width: 1700px) {
   #topbar-wrapper {
     padding-right: calc(100% - #{$sidebar-width-large}
@@ -1485,7 +1524,7 @@ table {
     max-width: calc(#{$main-content-max-width} + 20px)
   }
 
-  #main>div.row {
+  #main > div.row {
     padding-left: calc((100% - #{$main-content-max-width} - 2%) / 2);
   }
 
@@ -1505,7 +1544,7 @@ table {
 }
 
 @media (min-width: 1920px) {
-  #main>div.row {
+  #main > div.row {
     padding-left: 190px;
   }
 

assets/css/_addon/module.scss

@@ -7,7 +7,7 @@
 * MIT Licensed
 */
 
-/*---------- scss placeholder ---------*/
+/* ---------- scss placeholder --------- */
 
 %tag-hover {
   background: var(--tag-hover);
@@ -15,12 +15,12 @@
 }
 
 %table-cell {
-  padding: .35rem .8rem;
+  padding: 0.4rem 1rem;
   font-size: 95%;
 }
 
 %link-hover {
-  color: #d2603a!important;
+  color: #d2603a !important;
   border-bottom: 1px solid #d2603a;
   text-decoration: none;
 }
@@ -38,6 +38,7 @@
 }
 
 %heading {
+  font-weight: 400;
   font-family: 'Lato', 'Microsoft Yahei', sans-serif;
 }
 
@@ -49,14 +50,11 @@
 }
 
 %anchor {
-  .post-content &,
-  #page & {
-    padding-top: 3.5rem;
-    margin-top: -2.5rem;
-  }
+  padding-top: 3.5rem;
+  margin-top: -2.5rem;
 }
 
-/*---------- scss mixin ---------*/
+/* ---------- scss mixin --------- */
 
 @mixin no-text-decoration {
   text-decoration: none;
@@ -66,7 +64,7 @@
   color: $color;
   transition: color 0.35s ease-in-out;
   user-select: none;
-  margin: 0 .25rem;
+  margin: 0 0.25rem;
 }
 
 @mixin icon-round($diameter) {
@@ -100,3 +98,22 @@
   font-weight: $font-weight;
   font-family: 'Roboto Condensed', 'Microsoft Yahei', sans-serif;
 }
+
+@mixin panel-label {
+  @include label(inherit);
+  display: block;
+  line-height: 1.2;
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
+  margin-top: 0;
+  margin-bottom: 0;
+  letter-spacing: -0.02em;
+}
+
+@mixin align-center {
+  position: relative;
+  left: 50%;
+  -webkit-transform: translateX(-50%);
+  -ms-transform: translateX(-50%);
+  transform: translateX(-50%);
+}

assets/css/_addon/syntax.scss

@@ -9,8 +9,8 @@
 @import "_colors/light-syntax";
 @import "_colors/dark-syntax";
 
-
-html:not([mode]), html[mode=light] {
+html:not([mode]),
+html[mode=light] {
   @include light-syntax;
 }
 
@@ -19,7 +19,8 @@ html[mode=dark] {
 }
 
 @media (prefers-color-scheme: dark) {
-  html:not([mode]), html[mode=dark] {
+  html:not([mode]),
+  html[mode=dark] {
     @include dark-syntax;
   }
 
@@ -28,9 +29,9 @@ html[mode=dark] {
   }
 }
 
-/*-- Codes Snippet --*/
+/* -- Codes Snippet -- */
 
-%highlight-pre-bg {
+%code-snippet-bg {
   background: var(--highlight-bg-color);
 }
 
@@ -38,23 +39,38 @@ html[mode=dark] {
   border-radius: 5px;
 }
 
-.highlighter-rouge {
-  background: var(--highlight-bg-color);
+%code-snippet-padding {
+  padding: 0.8rem 1rem;
+}
+
+$code-font-size: 0.85rem;
+
+div > pre {
+  @extend %code-snippet-bg;
   @extend %code-snippet-radius;
+  @extend %code-snippet-padding;
+}
+
+.highlighter-rouge {
+  @extend %code-snippet-bg;
+  @extend %code-snippet-radius;
+
   color: var(--highlighter-rouge-color);
   margin-bottom: 1.2em; /* Override BS Inline-code style */
 }
 
 .highlight {
   @extend %code-snippet-radius;
-  background: var(--highlight-bg-color);
+  @extend %code-snippet-bg;
+
   @at-root figure#{&} {
-    background: var(--highlight-bg-color);
+    @extend %code-snippet-bg;
   }
+
   overflow: auto;
   .lineno {
-    margin: .8rem 0rem;
-    padding: 0 .5rem;
+    margin: 0.8rem 0;
+    padding: 0 0.5rem;
     min-width: 2.2rem;
     text-align: right;
     color: var(--highlight-lineno-color);
@@ -66,6 +82,12 @@ html[mode=dark] {
     -o-user-select: none;
     user-select: none;
   }
+  pre {
+    margin-bottom: 0;
+    font-size: $code-font-size;
+    line-height: 1.4rem;
+    word-wrap: normal; /* Fixed Safari overflow-x */
+  }
   table {
     padding: 0;
     border: 0;
@@ -78,14 +100,6 @@ html[mode=dark] {
     padding: 0;
     border: 0;
   }
-  pre {
-    margin-bottom: 0;
-    font-size: .85rem;
-    line-height: 1.4rem;
-    word-wrap: normal;
-    /* Fixed Safari overflow-x */
-  }
-
 } //.highlight
 
 code {
@@ -93,17 +107,27 @@ code {
   -ms-hyphens: none;
   -moz-hyphens: none;
   hyphens: none;
+
   &.highlighter-rouge {
-    padding: 2px 4px;
-    margin: 0 .15rem;
+    font-size: $code-font-size;
+    padding: 3px 5px;
+    margin: 0 0.15rem;
     border-radius: 4px;
+    background-color: var(--inline-code-bg);
   }
-  @at-root a>&.highlighter-rouge {
+
+  @at-root a > &.highlighter-rouge {
     padding-bottom: 0; // show link's underlinke
+    color: inherit;
   }
-  @at-root a:hover>&.highlighter-rouge {
+
+  @at-root a:hover > &.highlighter-rouge {
     border-bottom: none;
   }
+
+  blockquote &.highlighter-rouge {
+    color: inherit;
+  }
 }
 
 td.rouge-code {
@@ -111,16 +135,17 @@ td.rouge-code {
   padding-right: 1rem;
 }
 
-/* Hide line numbers for defualt, console, and terminal code snippets */
+/* Hide line numbers for default, console, and terminal code snippets */
 div {
   &[class^='highlighter-rouge'],
+  &.language-plaintext.highlighter-rouge,
   &.language-console.highlighter-rouge,
   &.language-terminal.highlighter-rouge {
     pre.lineno {
       display: none;
     }
     td.rouge-code {
-      padding: .8rem 1rem;
+      @extend %code-snippet-padding;
     }
   }
 }

assets/css/_addon/variables.scss

@@ -7,7 +7,7 @@
 * MIT Licensed
 */
 
-/*--- ↓ width and height ----*/
+/* --- ↓ width and height ---- */
 
 $tab-height: 3.3rem;
 $tab-cursor-height: 1.6rem;

assets/css/_colors/dark-syntax.scss

@@ -7,85 +7,82 @@
 */
 
 @mixin dark-syntax {
-  /* syntax highlight colors from https://raw.githubusercontent.com/jwarby/pygments-css/master/monokai.css */
-  .highlight pre { background-color: #272822; }
-  .highlight .hll { background-color: #272822; }
-  .highlight .c { color: #75715e } /* Comment */
-  .highlight .err { color: #960050; background-color: #1e0010 } /* Error */
-  .highlight .k { color: #66d9ef } /* Keyword */
-  .highlight .l { color: #ae81ff } /* Literal */
-  .highlight .n { color: #f8f8f2 } /* Name */
-  .highlight .o { color: #f92672 } /* Operator */
-  .highlight .p { color: #f8f8f2 } /* Punctuation */
-  .highlight .cm { color: #75715e } /* Comment.Multiline */
-  .highlight .cp { color: #75715e } /* Comment.Preproc */
-  .highlight .c1 { color: #75715e } /* Comment.Single */
-  .highlight .cs { color: #75715e } /* Comment.Special */
-  .highlight .ge { font-style: italic } /* Generic.Emph */
-  .highlight .gs { font-weight: bold } /* Generic.Strong */
-  .highlight .kc { color: #66d9ef } /* Keyword.Constant */
-  .highlight .kd { color: #66d9ef } /* Keyword.Declaration */
-  .highlight .kn { color: #f92672 } /* Keyword.Namespace */
-  .highlight .kp { color: #66d9ef } /* Keyword.Pseudo */
-  .highlight .kr { color: #66d9ef } /* Keyword.Reserved */
-  .highlight .kt { color: #66d9ef } /* Keyword.Type */
-  .highlight .ld { color: #e6db74 } /* Literal.Date */
-  .highlight .m { color: #ae81ff } /* Literal.Number */
-  .highlight .s { color: #e6db74 } /* Literal.String */
-  .highlight .na { color: #a6e22e } /* Name.Attribute */
-  .highlight .nb { color: #f8f8f2 } /* Name.Builtin */
-  .highlight .nc { color: #a6e22e } /* Name.Class */
-  .highlight .no { color: #66d9ef } /* Name.Constant */
-  .highlight .nd { color: #a6e22e } /* Name.Decorator */
-  .highlight .ni { color: #f8f8f2 } /* Name.Entity */
-  .highlight .ne { color: #a6e22e } /* Name.Exception */
-  .highlight .nf { color: #a6e22e } /* Name.Function */
-  .highlight .nl { color: #f8f8f2 } /* Name.Label */
-  .highlight .nn { color: #f8f8f2 } /* Name.Namespace */
-  .highlight .nx { color: #a6e22e } /* Name.Other */
-  .highlight .py { color: #f8f8f2 } /* Name.Property */
-  .highlight .nt { color: #f92672 } /* Name.Tag */
-  .highlight .nv { color: #f8f8f2 } /* Name.Variable */
-  .highlight .ow { color: #f92672 } /* Operator.Word */
-  .highlight .w { color: #f8f8f2 } /* Text.Whitespace */
-  .highlight .mf { color: #ae81ff } /* Literal.Number.Float */
-  .highlight .mh { color: #ae81ff } /* Literal.Number.Hex */
-  .highlight .mi { color: #ae81ff } /* Literal.Number.Integer */
-  .highlight .mo { color: #ae81ff } /* Literal.Number.Oct */
-  .highlight .sb { color: #e6db74 } /* Literal.String.Backtick */
-  .highlight .sc { color: #e6db74 } /* Literal.String.Char */
-  .highlight .sd { color: #e6db74 } /* Literal.String.Doc */
-  .highlight .s2 { color: #e6db74 } /* Literal.String.Double */
-  .highlight .se { color: #ae81ff } /* Literal.String.Escape */
-  .highlight .sh { color: #e6db74 } /* Literal.String.Heredoc */
-  .highlight .si { color: #e6db74 } /* Literal.String.Interpol */
-  .highlight .sx { color: #e6db74 } /* Literal.String.Other */
-  .highlight .sr { color: #e6db74 } /* Literal.String.Regex */
-  .highlight .s1 { color: #e6db74 } /* Literal.String.Single */
-  .highlight .ss { color: #e6db74 } /* Literal.String.Symbol */
-  .highlight .bp { color: #f8f8f2 } /* Name.Builtin.Pseudo */
-  .highlight .vc { color: #f8f8f2 } /* Name.Variable.Class */
-  .highlight .vg { color: #f8f8f2 } /* Name.Variable.Global */
-  .highlight .vi { color: #f8f8f2 } /* Name.Variable.Instance */
-  .highlight .il { color: #ae81ff } /* Literal.Number.Integer.Long */
-
-  .highlight .gh { } /* Generic Heading & Diff Header */
-  .highlight .gu { color: #75715e; } /* Generic.Subheading & Diff Unified/Comment? */
-  .highlight .gd { color: #f92672; } /* Generic.Deleted & Diff Deleted */
-  .highlight .gi { color: #a6e22e; } /* Generic.Inserted & Diff Inserted */
-
-
-  /*-----  My styles ------*/
-
+  /* -----  My styles ------ */
   --highlight-bg-color: #272822;
   --highlighter-rouge-color: #de6b18;
-
   --highlight-lineno-color: #6c6c6d;
   --highlight-lineno-border-color: #3c4042;
+  --inline-code-bg: var(--highlight-bg-color);
 
   .highlight {
     .gp { color: #818c96; }
   }
-  pre { color: #818c96 } /* override Bootstrap */
+
+  pre { color: #818c96; } /* override Bootstrap */
   kbd { background-color: black; }
-}
+
+  /* syntax highlight colors from https://raw.githubusercontent.com/jwarby/pygments-css/master/monokai.css */
+  .highlight pre { background-color: #272822; }
+  .highlight .hll { background-color: #272822; }
+  .highlight .c { color: #75715e; } /* Comment */
+  .highlight .err { color: #960050; background-color: #1e0010; } /* Error */
+  .highlight .k { color: #66d9ef; } /* Keyword */
+  .highlight .l { color: #ae81ff; } /* Literal */
+  .highlight .n { color: #f8f8f2; } /* Name */
+  .highlight .o { color: #f92672; } /* Operator */
+  .highlight .p { color: #f8f8f2; } /* Punctuation */
+  .highlight .cm { color: #75715e; } /* Comment.Multiline */
+  .highlight .cp { color: #75715e; } /* Comment.Preproc */
+  .highlight .c1 { color: #75715e; } /* Comment.Single */
+  .highlight .cs { color: #75715e; } /* Comment.Special */
+  .highlight .ge { font-style: italic; } /* Generic.Emph */
+  .highlight .gs { font-weight: bold; } /* Generic.Strong */
+  .highlight .kc { color: #66d9ef; } /* Keyword.Constant */
+  .highlight .kd { color: #66d9ef; } /* Keyword.Declaration */
+  .highlight .kn { color: #f92672; } /* Keyword.Namespace */
+  .highlight .kp { color: #66d9ef; } /* Keyword.Pseudo */
+  .highlight .kr { color: #66d9ef; } /* Keyword.Reserved */
+  .highlight .kt { color: #66d9ef; } /* Keyword.Type */
+  .highlight .ld { color: #e6db74; } /* Literal.Date */
+  .highlight .m { color: #ae81ff; } /* Literal.Number */
+  .highlight .s { color: #e6db74; } /* Literal.String */
+  .highlight .na { color: #a6e22e; } /* Name.Attribute */
+  .highlight .nb { color: #f8f8f2; } /* Name.Builtin */
+  .highlight .nc { color: #a6e22e; } /* Name.Class */
+  .highlight .no { color: #66d9ef; } /* Name.Constant */
+  .highlight .nd { color: #a6e22e; } /* Name.Decorator */
+  .highlight .ni { color: #f8f8f2; } /* Name.Entity */
+  .highlight .ne { color: #a6e22e; } /* Name.Exception */
+  .highlight .nf { color: #a6e22e; } /* Name.Function */
+  .highlight .nl { color: #f8f8f2; } /* Name.Label */
+  .highlight .nn { color: #f8f8f2; } /* Name.Namespace */
+  .highlight .nx { color: #a6e22e; } /* Name.Other */
+  .highlight .py { color: #f8f8f2; } /* Name.Property */
+  .highlight .nt { color: #f92672; } /* Name.Tag */
+  .highlight .nv { color: #f8f8f2; } /* Name.Variable */
+  .highlight .ow { color: #f92672; } /* Operator.Word */
+  .highlight .w { color: #f8f8f2; } /* Text.Whitespace */
+  .highlight .mf { color: #ae81ff; } /* Literal.Number.Float */
+  .highlight .mh { color: #ae81ff; } /* Literal.Number.Hex */
+  .highlight .mi { color: #ae81ff; } /* Literal.Number.Integer */
+  .highlight .mo { color: #ae81ff; } /* Literal.Number.Oct */
+  .highlight .sb { color: #e6db74; } /* Literal.String.Backtick */
+  .highlight .sc { color: #e6db74; } /* Literal.String.Char */
+  .highlight .sd { color: #e6db74; } /* Literal.String.Doc */
+  .highlight .s2 { color: #e6db74; } /* Literal.String.Double */
+  .highlight .se { color: #ae81ff; } /* Literal.String.Escape */
+  .highlight .sh { color: #e6db74; } /* Literal.String.Heredoc */
+  .highlight .si { color: #e6db74; } /* Literal.String.Interpol */
+  .highlight .sx { color: #e6db74; } /* Literal.String.Other */
+  .highlight .sr { color: #e6db74; } /* Literal.String.Regex */
+  .highlight .s1 { color: #e6db74; } /* Literal.String.Single */
+  .highlight .ss { color: #e6db74; } /* Literal.String.Symbol */
+  .highlight .bp { color: #f8f8f2; } /* Name.Builtin.Pseudo */
+  .highlight .vc { color: #f8f8f2; } /* Name.Variable.Class */
+  .highlight .vg { color: #f8f8f2; } /* Name.Variable.Global */
+  .highlight .vi { color: #f8f8f2; } /* Name.Variable.Instance */
+  .highlight .il { color: #ae81ff; } /* Literal.Number.Integer.Long */
+  .highlight .gu { color: #75715e; } /* Generic.Subheading & Diff Unified/Comment? */
+  .highlight .gd { color: #f92672; background-color: #561c08; } /* Generic.Deleted & Diff Deleted */
+  .highlight .gi { color: #a6e22e; background-color: #0b5858; } /* Generic.Inserted & Diff Inserted */
+}

assets/css/_colors/dark-typography.scss

@@ -23,16 +23,13 @@
   --link-color: rgb(138, 180, 248);
   --link-underline-color: rgb(82, 108, 150);
   --main-border-color: rgb(44, 45, 45);
-  --button-bg: rgb(39, 40, 33);
+  --button-bg: rgb(39, 40, 43);
   --blockquote-border-color: rgb(66, 66, 66);
   --blockquote-text-color: rgb(117, 117, 117);
-
   --btn-border-color: rgb(63, 65, 68);
   --btn-backtotop-color: var(--text-color);
   --btn-backtotop-border-color: var(--btn-border-color);
   --btn-box-shadow: var(--main-wrapper-bg);
-
-  --card-bg: rgb(39, 40, 33);
   --card-header-bg: rgb(51, 50, 50);
   --label-color: rgb(108, 117, 125);
 
@@ -46,6 +43,7 @@
   /* Home page */
   --post-list-text-color: rgb(175, 176, 177);
   --btn-patinator-text-color: var(--text-color);
+  --btn-paginator-hover-color: rgb(64, 65, 66);
   --btn-active-bg: rgba(28, 52, 94, 1);
   --btn-active-border-color: rgb(66, 94, 138);
   --btn-text-color: var(--text-color);
@@ -56,21 +54,21 @@
   --toc-highlight: rgb(116, 178, 243);
   --tag-bg: rgb(41, 40, 40);
   --tag-hover: rgb(43, 56, 62);
-  --tb-odd-bg: rgba(52, 53, 42, 0.52); /* odd rows of the posts' table */
+  --tb-odd-bg: rgba(42, 47, 53, 0.52); /* odd rows of the posts' table */
   --tb-even-bg: rgb(31, 31, 34); /* even rows of the posts' table */
   --tb-border-color: var(--tb-odd-bg);
   --footnote-target-bg: rgb(63, 81, 181);
   --btn-share-color: #6c757d;
   --btn-share-hover-color: #bfc1ca;
   --relate-post-date: var(--text-muted-color);
-  --card-border-color: var(--main-wrapper-bg);
+  --card-bg: rgb(39, 40, 43);
+  --card-border-color: rgb(53, 53, 60);
   --card-box-shadow: var(--main-wrapper-bg);
 
   /* tags */
   --tag-border: rgb(59, 79, 88);
   --tag-shadow: rgb(32, 33, 33);
   --search-tag-bg: var(--tag-bg);
-
   --dash-color: rgb(63, 65, 68);
 
   /* categories */
@@ -83,7 +81,7 @@
   --timeline-year-dot-color: var(--timeline-color);
 
   /* Footer */
-  ---footer-link: rgb(146, 146, 146);
+  --footer-link: rgb(171, 171, 171);
 
   .post-content img {
     filter: brightness(90%);
@@ -97,10 +95,10 @@
   nav[data-toggle=toc] .nav-link.active,
   nav[data-toggle=toc] .nav-link.active:focus,
   nav[data-toggle=toc] .nav-link.active:hover,
-  nav[data-toggle=toc] .nav>li>a:focus,
-  nav[data-toggle=toc] .nav>li>a:hover {
-    color: var(--toc-highlight)!important;
-    border-left-color: var(--toc-highlight)!important;
+  nav[data-toggle=toc] .nav > li > a:focus,
+  nav[data-toggle=toc] .nav > li > a:hover {
+    color: var(--toc-highlight) !important;
+    border-left-color: var(--toc-highlight) !important;
   }
 
   /* categories */
@@ -125,8 +123,13 @@
   }
 
   #archives li:nth-child(odd) {
-    background-image: linear-gradient(to left,
-      rgb(26, 26, 30), rgb(39, 39, 45), rgb(39, 39, 45), rgb(39, 39, 45), rgb(26, 26, 30));
+    background-image: linear-gradient(
+      to left,
+      rgb(26, 26, 30),
+      rgb(39, 39, 45),
+      rgb(39, 39, 45),
+      rgb(39, 39, 45),
+      rgb(26, 26, 30));
   }
 
 } // dark-scheme

assets/css/_colors/light-syntax.scss

@@ -8,72 +8,72 @@
 
 @mixin light-syntax {
   /* see: <https://raw.githubusercontent.com/jwarby/pygments-css/master/github.css> */
-  .highlight .hll { background-color: #ffffcc }
-  .highlight .c { color: #999988; font-style: italic } /* Comment */
-  .highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
-  .highlight .k { color: #000000; font-weight: bold } /* Keyword */
-  .highlight .o { color: #000000; font-weight: bold } /* Operator */
-  .highlight .cm { color: #999988; font-style: italic } /* Comment.Multiline */
-  .highlight .cp { color: #999999; font-weight: bold; font-style: italic } /* Comment.Preproc */
-  .highlight .c1 { color: #999988; font-style: italic } /* Comment.Single */
-  .highlight .cs { color: #999999; font-weight: bold; font-style: italic } /* Comment.Special */
-  .highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
-  .highlight .ge { color: #000000; font-style: italic } /* Generic.Emph */
-  .highlight .gr { color: #aa0000 } /* Generic.Error */
-  .highlight .gh { color: #999999 } /* Generic.Heading */
-  .highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
-  .highlight .go { color: #888888 } /* Generic.Output */
-  .highlight .gp { color: #555555 } /* Generic.Prompt */
-  .highlight .gs { font-weight: bold } /* Generic.Strong */
-  .highlight .gu { color: #aaaaaa } /* Generic.Subheading */
-  .highlight .gt { color: #aa0000 } /* Generic.Traceback */
-  .highlight .kc { color: #000000; font-weight: bold } /* Keyword.Constant */
-  .highlight .kd { color: #000000; font-weight: bold } /* Keyword.Declaration */
-  .highlight .kn { color: #000000; font-weight: bold } /* Keyword.Namespace */
-  .highlight .kp { color: #000000; font-weight: bold } /* Keyword.Pseudo */
-  .highlight .kr { color: #000000; font-weight: bold } /* Keyword.Reserved */
-  .highlight .kt { color: #445588; font-weight: bold } /* Keyword.Type */
-  .highlight .m { color: #009999 } /* Literal.Number */
-  .highlight .s { color: #d01040 } /* Literal.String */
-  .highlight .na { color: #008080 } /* Name.Attribute */
-  .highlight .nb { color: #0086B3 } /* Name.Builtin */
-  .highlight .nc { color: #445588; font-weight: bold } /* Name.Class */
-  .highlight .no { color: #008080 } /* Name.Constant */
-  .highlight .nd { color: #3c5d5d; font-weight: bold } /* Name.Decorator */
-  .highlight .ni { color: #800080 } /* Name.Entity */
-  .highlight .ne { color: #990000; font-weight: bold } /* Name.Exception */
-  .highlight .nf { color: #990000; font-weight: bold } /* Name.Function */
-  .highlight .nl { color: #990000; font-weight: bold } /* Name.Label */
-  .highlight .nn { color: #555555 } /* Name.Namespace */
-  .highlight .nt { color: #000080 } /* Name.Tag */
-  .highlight .nv { color: #008080 } /* Name.Variable */
-  .highlight .ow { color: #000000; font-weight: bold } /* Operator.Word */
-  .highlight .w { color: #bbbbbb } /* Text.Whitespace */
-  .highlight .mf { color: #009999 } /* Literal.Number.Float */
-  .highlight .mh { color: #009999 } /* Literal.Number.Hex */
-  .highlight .mi { color: #009999 } /* Literal.Number.Integer */
-  .highlight .mo { color: #009999 } /* Literal.Number.Oct */
-  .highlight .sb { color: #d01040 } /* Literal.String.Backtick */
-  .highlight .sc { color: #d01040 } /* Literal.String.Char */
-  .highlight .sd { color: #d01040 } /* Literal.String.Doc */
-  .highlight .s2 { color: #d01040 } /* Literal.String.Double */
-  .highlight .se { color: #d01040 } /* Literal.String.Escape */
-  .highlight .sh { color: #d01040 } /* Literal.String.Heredoc */
-  .highlight .si { color: #d01040 } /* Literal.String.Interpol */
-  .highlight .sx { color: #d01040 } /* Literal.String.Other */
-  .highlight .sr { color: #009926 } /* Literal.String.Regex */
-  .highlight .s1 { color: #d01040 } /* Literal.String.Single */
-  .highlight .ss { color: #990073 } /* Literal.String.Symbol */
-  .highlight .bp { color: #999999 } /* Name.Builtin.Pseudo */
-  .highlight .vc { color: #008080 } /* Name.Variable.Class */
-  .highlight .vg { color: #008080 } /* Name.Variable.Global */
-  .highlight .vi { color: #008080 } /* Name.Variable.Instance */
-  .highlight .il { color: #009999 } /* Literal.Number.Integer.Long */
+  .highlight .hll { background-color: #ffffcc; }
+  .highlight .c { color: #999988; font-style: italic; } /* Comment */
+  .highlight .err { color: #a61717; background-color: #e3d2d2; } /* Error */
+  .highlight .k { color: #000000; font-weight: bold; } /* Keyword */
+  .highlight .o { color: #000000; font-weight: bold; } /* Operator */
+  .highlight .cm { color: #999988; font-style: italic; } /* Comment.Multiline */
+  .highlight .cp { color: #999999; font-weight: bold; font-style: italic; } /* Comment.Preproc */
+  .highlight .c1 { color: #999988; font-style: italic; } /* Comment.Single */
+  .highlight .cs { color: #999999; font-weight: bold; font-style: italic; } /* Comment.Special */
+  .highlight .gd { color: #d01040; background-color: #ffdddd; } /* Generic.Deleted */
+  .highlight .ge { color: #000000; font-style: italic; } /* Generic.Emph */
+  .highlight .gr { color: #aa0000; } /* Generic.Error */
+  .highlight .gh { color: #999999; } /* Generic.Heading */
+  .highlight .gi { color: #008080; background-color: #ddffdd; } /* Generic.Inserted */
+  .highlight .go { color: #888888; } /* Generic.Output */
+  .highlight .gp { color: #555555; } /* Generic.Prompt */
+  .highlight .gs { font-weight: bold; } /* Generic.Strong */
+  .highlight .gu { color: #aaaaaa; } /* Generic.Subheading */
+  .highlight .gt { color: #aa0000; } /* Generic.Traceback */
+  .highlight .kc { color: #000000; font-weight: bold; } /* Keyword.Constant */
+  .highlight .kd { color: #000000; font-weight: bold; } /* Keyword.Declaration */
+  .highlight .kn { color: #000000; font-weight: bold; } /* Keyword.Namespace */
+  .highlight .kp { color: #000000; font-weight: bold; } /* Keyword.Pseudo */
+  .highlight .kr { color: #000000; font-weight: bold; } /* Keyword.Reserved */
+  .highlight .kt { color: #445588; font-weight: bold; } /* Keyword.Type */
+  .highlight .m { color: #009999; } /* Literal.Number */
+  .highlight .s { color: #d01040; } /* Literal.String */
+  .highlight .na { color: #008080; } /* Name.Attribute */
+  .highlight .nb { color: #0086b3; } /* Name.Builtin */
+  .highlight .nc { color: #445588; font-weight: bold; } /* Name.Class */
+  .highlight .no { color: #008080; } /* Name.Constant */
+  .highlight .nd { color: #3c5d5d; font-weight: bold; } /* Name.Decorator */
+  .highlight .ni { color: #800080; } /* Name.Entity */
+  .highlight .ne { color: #990000; font-weight: bold; } /* Name.Exception */
+  .highlight .nf { color: #990000; font-weight: bold; } /* Name.Function */
+  .highlight .nl { color: #990000; font-weight: bold; } /* Name.Label */
+  .highlight .nn { color: #555555; } /* Name.Namespace */
+  .highlight .nt { color: #000080; } /* Name.Tag */
+  .highlight .nv { color: #008080; } /* Name.Variable */
+  .highlight .ow { color: #000000; font-weight: bold; } /* Operator.Word */
+  .highlight .w { color: #bbbbbb; } /* Text.Whitespace */
+  .highlight .mf { color: #009999; } /* Literal.Number.Float */
+  .highlight .mh { color: #009999; } /* Literal.Number.Hex */
+  .highlight .mi { color: #009999; } /* Literal.Number.Integer */
+  .highlight .mo { color: #009999; } /* Literal.Number.Oct */
+  .highlight .sb { color: #d01040; } /* Literal.String.Backtick */
+  .highlight .sc { color: #d01040; } /* Literal.String.Char */
+  .highlight .sd { color: #d01040; } /* Literal.String.Doc */
+  .highlight .s2 { color: #d01040; } /* Literal.String.Double */
+  .highlight .se { color: #d01040; } /* Literal.String.Escape */
+  .highlight .sh { color: #d01040; } /* Literal.String.Heredoc */
+  .highlight .si { color: #d01040; } /* Literal.String.Interpol */
+  .highlight .sx { color: #d01040; } /* Literal.String.Other */
+  .highlight .sr { color: #009926; } /* Literal.String.Regex */
+  .highlight .s1 { color: #d01040; } /* Literal.String.Single */
+  .highlight .ss { color: #990073; } /* Literal.String.Symbol */
+  .highlight .bp { color: #999999; } /* Name.Builtin.Pseudo */
+  .highlight .vc { color: #008080; } /* Name.Variable.Class */
+  .highlight .vg { color: #008080; } /* Name.Variable.Global */
+  .highlight .vi { color: #008080; } /* Name.Variable.Instance */
+  .highlight .il { color: #009999; } /* Literal.Number.Integer.Long */
 
-  /*--- custom light colors ---*/
+  /* --- custom light colors --- */
   --highlight-bg-color: #f7f7f7;
   --highlighter-rouge-color: #353a3d;
   --highlight-lineno-color: #c2c6cc;
   --highlight-lineno-border-color: #e9ecef;
-
+  --inline-code-bg: #f3f3f3;
 } // light-syntax

assets/css/_colors/light-typography.scss

@@ -7,116 +7,70 @@
 */
 
 @mixin light-scheme {
-
+  /* Common */
   --body-bg: #fafafa;
-
   --mask-bg: #c1c3c5;
-
   --main-wrapper-bg: white;
-
   --main-border-color: #f3f3f3;
-
   --btn-border-color: #e9ecef;
-
   --text-color: #333333;
-
   --blockquote-border-color: #eee;
-
   --blockquote-text-color: #9a9a9a;
-
   --link-color: #2a408e;
-
   --link-underline-color: #dee2e6;
-
   --text-muted-color: gray;
-
   --tb-odd-bg: #fbfcfd;
-
   --tb-border-color: #eaeaea;
-
   --button-bg: #fff;
-
   --btn-backtotop-color: #686868;
-
   --btn-backtotop-border-color: #f1f1f1; //--main-border-color,
-
   --btn-box-shadow: #eaeaea;
 
   /* Sidebar */
-
   --sidebar-bg: radial-gradient(
-    circle, rgba(42, 30, 107, 1) 0%, rgba(35, 37, 46, 1) 100%);
-
+    circle,
+    rgba(42, 30, 107, 1) 0%,
+    rgba(35, 37, 46, 1) 100%);
   --nav-cursor-color: #fcfcfc;
 
   /* Topbar */
-
   --topbar-wrapper-bg: white;
-
   --topbar-text-color: rgb(78, 78, 78);
-
   --search-wrapper-bg: #f5f5f5;
-
   --search-tag-bg: #f8f9fa;
-
   --search-icon-color: #c2c6cc;
-
   --input-focus-border-color: var(--btn-border-color);
 
-  /* Home */
-
+  /* Home page */
   --post-list-text-color: dimgray;
-
   --btn-patinator-text-color: #555555;
-
+  --btn-paginator-hover-color: #e9ecef;
   --btn-active-bg: #2a408e;
-
   --btn-active-border-color: #007bff;
-
   --btn-text-color: #f8f8f8;
-
   --btn-paginator-border-color: #f1f1f1;
-
   --btn-paginator-shadow: #4b92d2;
 
   /* Posts */
-
   --btn-share-hover-color: var(--link-color);
-
   --card-border-color: #f1f1f1;
-
   --card-box-shadow: rgba(234, 234, 234, 0.7686274509803922);
-
   --label-color: #808080;
-
-  --relate-post-date: rgba(30, 55, 70, .4);
-
+  --relate-post-date: rgba(30, 55, 70, 0.4);
   --tag-bg: rgba(0, 0, 0, 0.075);
-
   --tag-border: #dee2e6;
-
   --tag-shadow: var(--btn-border-color);
-
   --tag-hover: rgb(222, 226, 230);
-
   --categories-hover-bg: var(--btn-border-color);
-
   --dash-color: silver;
 
-
   /* Archive */
-
   --timeline-color: rgba(0, 0, 0, 0.075);
-
   --timeline-node-bg: #c2c6cc;
-
   --timeline-year-dot-color: #ffffff;
 
   /* Footer */
-
   --footer-bg-color: #ffffff;
-
   --footnote-target-bg: lightcyan;
-
-  ---footer-link: inherit;
-}
+  --footer-link: #424242;
+} // light-scheme

assets/css/archives.scss

@@ -33,7 +33,7 @@
       background-image: linear-gradient(
         to left, #fff, #fbfbfb, #fbfbfb, #fbfbfb, #fff);
     }
-    >div {
+    > div {
       white-space: nowrap;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -111,12 +111,12 @@
   } // #archives .date
 
   ul {
-    >li {
-      >div>a {
+    > li {
+      > div > a {
         /* post title in Archvies */
         margin-left: 2.5rem;
         position: relative;
-        top: .1rem;
+        top: 0.1rem;
       }
       &::after {
         @extend %date-timeline;
@@ -129,10 +129,10 @@
         top: -1.61rem;
       }
     }
-    &:not(:last-child)>li:last-child::after {
+    &:not(:last-child) > li:last-child::after {
       height: 3.4rem;
     }
-    &:last-child>li:last-child::after {
+    &:last-child > li:last-child::after {
       display: none;
     }
   } // #archives ul

assets/css/categories.scss

@@ -22,7 +22,7 @@
     border-left: none;
     border-right: none;
     padding-left: 2rem;
-    >i {
+    > i {
       @extend %category-icon-color;
     }
     &:first-child {
@@ -32,7 +32,7 @@
 
   }
 
-  .card-header>span>i:first-child {
+  .card-header > span > i:first-child {
     @extend %category-icon-color;
   }
 
@@ -50,9 +50,9 @@
   border-radius: 50%;
   text-align: center;
   color: #6c757d!important;
-  >i.fas {
+  > i.fas {
     position: relative;
-    height: .7rem;
+    height: 0.7rem;
     width: 1rem;
     transition: 300ms ease all;
   }
@@ -68,4 +68,4 @@
   -ms-transform: rotate(-90deg); /* IE 9 */
   -webkit-transform: rotate(-90deg); /* Safari 3-8 */
   transform: rotate(-90deg);
-}
+}

assets/css/category-tag.scss

@@ -10,9 +10,9 @@
 {% include_relative _addon/main.scss %}
 
 #page-category, #page-tag {
-  ul>li {
+  ul > li {
     line-height: 1.5rem;
-    padding: .6rem 0;
+    padding: 0.6rem 0;
     &::before { // dot
       background: #999;
       width: 5px;
@@ -21,25 +21,25 @@
       display: block;
       content: "";
       position: relative;
-      top: .6rem;
-      margin-right: .5rem;
+      top: 0.6rem;
+      margin-right: 0.5rem;
     }
-    >a { /* post's title */
+    > a { /* post's title */
       font-size: 1.1rem;
       @extend %no-bottom-border;
     }
-    >span:last-child {
+    > span:last-child {
       white-space: nowrap;
     }
     /* post's date */
   }
 }
 
-#page-tag h1>i { // tag icon
+#page-tag h1 > i { // tag icon
   font-size: 1.2rem;
 }
 
-#page-category h1>i {
+#page-category h1 > i {
   font-size: 1.25rem;
 }
 
@@ -59,15 +59,15 @@ a:hover {
 
 @media all and (max-width: 576px) {
   #page-category, #page-tag {
-    ul>li {
+    ul > li {
       &::before {
         margin: 0 .5rem;
       }
-      >a {
+      > a {
         white-space: nowrap;
         overflow: hidden;
         text-overflow: ellipsis;
       }
     }
   }
-}
+}

assets/css/home.scss

@@ -10,91 +10,102 @@
 
 #post-list {
   margin-top: 1rem;
-  padding-right: .5rem;
-  .post-meta {
-    i:not(:first-child) { // post-meta icons on HOME
-      margin-left: 1.5rem;
+  padding-right: 0.5rem;
+
+  .post-preview {
+    padding-top: 1.5rem;
+    padding-bottom: 1rem;
+    border-bottom: 1px solid var(--main-border-color);
+
+    h1 {
+      font-size: 1.4rem;
+      margin: 0;
+      ~i { // pinned icon
+        font-size: 0.86rem;
+      }
     }
-  }
-}
+
+    .post-meta {
+      i {
+        font-size: 0.73rem;
+        &:not(:first-child) { // post-meta icons on the homepage
+          margin-left: 1.5rem;
+        }
+      }
+    }
+
+    .post-content {
+      margin-top: 0.6rem;
+      margin-bottom: 0.6rem;
+      color: var(--post-list-text-color);
+      >p {
+        /* Make preview shorter on the homepage */
+        margin: 0;
+        overflow: hidden;
+        text-overflow: ellipsis;
+        display: -webkit-box;
+        -webkit-line-clamp: 2;
+        -webkit-box-orient: vertical;
+      }
+    }
+
+  } // .post-preview
+
+} // #post-list
 
 .pagination {
   font-size: 1rem;
   a:hover {
     text-decoration: none;
   }
-}
 
-.post-preview {
-  padding-top: 1.5rem;
-  padding-bottom: 1rem;
-  border-bottom: 1px solid var(--main-border-color);
-  >h1 {
-    font-size: 1.4rem;
-    margin: 0;
-  }
-  i.far { /* fontawesome icons */
-    font-size: 86%;
-  }
-  .post-content {
-    margin-top: .6rem;
-    margin-bottom: .6rem;
-    color: var(--post-list-text-color);
-    >p { /* Make preview shorter in Home page*/
-      margin: 0;
-      overflow: hidden;
-      text-overflow: ellipsis;
+  .page-item {
+    .page-link {
+      color: var(--btn-patinator-text-color);
+      width: 2.5rem;
+      height: 2.5rem;
+      padding: 0;
+      text-align: center;
       display: -webkit-box;
-      -webkit-line-clamp: 2;
-      -webkit-box-orient: vertical;
-    }
-  }
-}
-
-.page-item {
-  .page-link {
-    color: var(--btn-patinator-text-color);
-    width: 2.5rem;
-    height: 2.5rem;
-    padding: 0;
-    text-align: center;
-    display: -webkit-box;
-    display: flex;
-    -webkit-box-pack: center;
-    justify-content: center;
-    -webkit-box-align: center;
-    align-items: center;
-    border-radius: 50%;
-    border: 1px solid var(--btn-paginator-border-color);
-    font-family: 'Lato', sans-serif;
-    background-color: var(--button-bg);
-  }
-  &.active {
-    .page-link {
-      background-color: var(--btn-active-bg);
-      border-color: var(--btn-active-border-color);
-      box-shadow: 0 0 8px 0 var(--btn-paginator-shadow) !important;
-      color: var(--btn-text-color);
-    }
-  }
-  &.disabled {
-    cursor: not-allowed;
-    .page-link {
-      color: rgba(108, 117, 125, 0.57);
-      border-color: var(--btn-paginator-border-color);
+      display: flex;
+      -webkit-box-pack: center;
+      justify-content: center;
+      -webkit-box-align: center;
+      align-items: center;
+      border-radius: 50%;
+      border: 1px solid var(--btn-paginator-border-color);
+      font-family: 'Lato', sans-serif;
       background-color: var(--button-bg);
+      &:hover {
+        background-color: var(--btn-paginator-hover-color)
+      }
     }
-  }
-  &:first-child .page-link,
-  &:last-child .page-link {
-    border-radius: 50%;
-  }
-  &:not(:last-child) {
-    margin-right: 0.6rem;
-  }
-
-} // .page-item
+    &.active {
+      .page-link {
+        background-color: var(--btn-active-bg);
+        border-color: var(--btn-active-border-color);
+        box-shadow: 0 0 8px 0 var(--btn-paginator-shadow) !important;
+        color: var(--btn-text-color);
+      }
+    }
+    &.disabled {
+      cursor: not-allowed;
+      .page-link {
+        color: rgba(108, 117, 125, 0.57);
+        border-color: var(--btn-paginator-border-color);
+        background-color: var(--button-bg);
+      }
+    }
+    &:first-child .page-link,
+    &:last-child .page-link {
+      border-radius: 50%;
+    }
+    &:not(:last-child) {
+      margin-right: 0.7rem;
+    }
+  } // .page-item
 
+} // .pagination
 
 @media all and (max-width: 576px) {
   #post-list .post-meta>span i:not(:first-child) {
@@ -117,13 +128,13 @@
   }
 
   .pagination {
-    font-size: .85rem;
+    font-size: 0.85rem;
+    .page-item .page-link {
+      width: 2.2rem;
+      height: 2.2rem;
+    }
   }
 
-  .page-item .page-link {
-    width: 2.2rem;
-    height: 2.2rem;
-  }
 }
 
 /* Pannel hidden */
@@ -131,4 +142,4 @@
   #post-list {
     padding-right: 0;
   }
-}
+}

assets/css/post.scss

@@ -27,25 +27,30 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   border-color: var(--btn-border-color);
 }
 
-.author {
-  @include semi-bold;
-}
-
-.post {
-  img {
-    max-width: 100%;
-    margin-top: .5rem;
-    margin-bottom: 1.5rem;
-    position: relative;
-    left: 50%;
-    -webkit-transform: translateX(-50%);
-    -ms-transform: translateX(-50%);
-    transform: translateX(-50%);
+.post-content {
+  > ol, > ul, > dl {
+    padding-left: 2rem;
+    li+li {
+      margin-top: 0.3rem;
+    }
+  }
+  li {
+    > ol, > ul, > dl { // sub list
+      padding-left: 2rem;
+    }
+    > p {
+      margin: 1rem 0 0.8rem;
+    }
+  }
+  .post-preview-img {
+    margin-top: 0;
+    margin-bottom: 2.5rem;
+    @include align-center;
   }
 }
 
 .post-tail-wrapper {
-  margin-top: 4rem;
+  margin-top: 6rem;
   border-bottom: 1px double var(--main-border-color);
   font-size: 0.85rem;
 }
@@ -56,7 +61,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
 
 .post-navigation {
   padding-top: 3rem;
-  padding-bottom: 2rem;
+  padding-bottom: 4rem;
 
   .btn {
     @include btn-post-nav;
@@ -84,20 +89,20 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   p {
     font-size: 1.1rem;
     line-height: 1.5rem;
-    margin-top: .3rem;
+    margin-top: 0.3rem;
     white-space: normal;
   }
 
   a, span {
     &::before {
       color: var(--text-muted-color);
-      font-size: .65rem;
+      font-size: 0.65rem;
       text-transform: uppercase;
     }
     &:first-child {
       border-top-right-radius: 0;
       border-bottom-right-radius: 0;
-      left: .5px;
+      left: 0.5px;
       &::before {
         content: $prompt-older
       }
@@ -105,7 +110,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     &:last-child {
       border-top-left-radius: 0;
       border-bottom-left-radius: 0;
-      right: .5px;
+      right: 0.5px;
       &::before {
         content: $prompt-newer
       }
@@ -136,15 +141,15 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   &.topbar-down {
     top: 6rem;
   }
-  >h3 {
-    @include label(inherit, 600);
+  > span {
+    @include panel-label;
   }
 }
 
 #toc li>a {
   line-height: 1rem;
-  padding-top: .5rem;
-  padding-bottom: .5rem;
+  padding-top: 0.5rem;
+  padding-bottom: 0.5rem;
 }
 
 
@@ -167,7 +172,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     &:hover {
       -webkit-transform: translate3d(0, -3px, 0);
       transform: translate3d(0, -3px, 0);
-      filter: drop-shadow(2px 4px 6px rgba(0, 0, 0, 0.08));
+      box-shadow: 0 20px 35px -4px rgba(0, 0, 0, 0.15);
     }
   }
 
@@ -176,8 +181,8 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
   }
 
   p {
-    font-size: .9rem;
-    margin-bottom: .5rem;
+    font-size: 0.9rem;
+    margin-bottom: 0.5rem;
     overflow: hidden;
     text-overflow: ellipsis;
     display: -webkit-box;
@@ -208,6 +213,9 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
 
 #post-extend-wrapper {
   min-height: 2rem;
+  #disqus_thread {
+    margin-bottom: 2rem;
+  }
 }
 
 .post-tail-bottom a {
@@ -225,7 +233,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     font-size: 1.2rem;
     a {
       &:not(:last-child) {
-        margin-right: .25rem;
+        margin-right: 0.25rem;
       }
       &:hover {
         text-decoration: none;
@@ -235,7 +243,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
       }
     }
     >i {
-      padding-top: .35rem;
+      padding-top: 0.35rem;
       &:hover {
         @extend %btn-share-hovor;
       }
@@ -283,7 +291,7 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
     font-weight: 400;
   }
   span:last-child {
-    font-size: .85rem;
+    font-size: 0.85rem;
   }
 } // .license-wrapper
 
@@ -312,8 +320,8 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
         content: "\2022";
         color: rgba(158, 158, 158, 0.8);
         font-weight: bold;
-        padding-left: .5rem;
-        padding-right: .3rem;
+        padding-left: 0.5rem;
+        padding-right: 0.3rem;
       }
       &.flex-column {
         -webkit-box-orient: horizontal!important;
@@ -333,47 +341,10 @@ $prompt-newer: "{{ site.data.label.post.button.next }}";
 
 /* Hide SideBar and TOC */
 @media all and (max-width: 830px) {
-  .post img {
-    position: relative;
-    left: 50%;
-    -webkit-transform: translateX(-50%);
-    -ms-transform: translateX(-50%);
-    transform: translateX(-50%);
-  }
-
   .post-navigation {
     padding-left: 0;
     padding-right: 0;
     margin-left: -.5rem;
     margin-right: -.5rem;
   }
-
-}
-
-/*
-  The following resposive design aim to
-  make #post-extend-wrapper margin-right same as pannel's width
-*/
-@media all and (min-width: 1200px) {
-  #post-extend-wrapper {
-    margin-right: 25%;
-  }
-}
-
-@media all and (min-width: 1460px) {
-  #post-extend-wrapper {
-    margin-right: 300px;
-  }
-}
-
-@media all and (min-width: 1650px) {
-  #post-extend-wrapper {
-    margin-right: calc((100% - 1150px) / 10 + 300px);
-  }
-}
-
-@media all and (min-width: 1700px) {
-  #post-extend-wrapper {
-    margin-right: calc((100% - 1150px) / 8 + 300px);
-  }
 }

assets/css/tags.scss

@@ -12,7 +12,7 @@
 .tag {
   border-radius: 0.7em;
   padding: 6px 8px 7px;
-  margin-right: .8rem;
+  margin-right: 0.8rem;
   line-height: 3rem;
   letter-spacing: 0;
   border: 1px solid var(--tag-border) !important;
@@ -22,4 +22,4 @@
     font-size: 0.7em;
     font-family: 'Oswald', sans-serif;
   }
-}
+}

assets/data/pv-data.json

@@ -1,12 +0,0 @@
----
----
-
-const proxyData = '{"url": "{{ site.google_analytics.pv.proxy_endpoint }}"}';
-
-{%- capture pv_data -%}
-  {%- if site.google_analytics.pv.cache and site.google_analytics.pv.enabled -%}
-    {% include_relative _pageviews.json %}
-  {%- endif -%}
-{%- endcapture -%}
-
-const pageviews = '{{ pv_data }}';

assets/img/favicons/manifest.json

@@ -8,7 +8,7 @@ layout: compress
 # MIT License
 ---
 
-{% assign icon_url = "/assets/img/favicons/" | relative_url %}
+{% assign icon_url = "/assets/img/favicons" | relative_url %}
 
 {
   "name": "{{ site.title }}",

assets/js/_commons.js

@@ -0,0 +1,21 @@
+/*!
+  Aggregation of common JS.
+  Chirpy@2.3
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT License
+*/
+
+{% include_relative _commons/back-to-top.js %}
+
+{% include_relative _commons/search-display.js %}
+
+{% include_relative _commons/sidebar.js %}
+
+{% include_relative _commons/topbar-switch.js %}
+
+{% include_relative _commons/topbar-title.js %}
+
+{% include_relative _commons/copy-link.js %}
+
+{% include_relative _utils/tooltip-loader.js %}

assets/js/_commons/back-to-top.js

@@ -0,0 +1,18 @@
+/*
+Reference: https://bootsnipp.com/snippets/featured/link-to-top-page
+*/
+$(window).scroll(function() {
+  if ($(this).scrollTop() > 50
+      && $("#sidebar-trigger").css("display") === "none") {
+    $("#back-to-top").fadeIn();
+  } else {
+    $("#back-to-top").fadeOut();
+  }
+});
+
+$(function() {
+  $("#back-to-top").click(function() {
+    $("body,html").animate({scrollTop: 0}, 800);
+    return false;
+  });
+});

assets/js/_commons/copy-link.js

@@ -0,0 +1,22 @@
+/*
+ * Copy current page url to clipboard.
+ * v2.1
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2020 Cotes Chung
+ * MIT License
+ */
+
+function copyLink(url) {
+  if (!url || 0 === url.length) {
+    url = window.location.href;
+  }
+  
+  var $temp = $("<input>");
+  $("body").append($temp);
+  $temp.val(url).select();
+  document.execCommand("copy");
+  $temp.remove();
+
+  alert("Link copied successfully!");
+
+}

assets/js/_commons/search-display.js

@@ -0,0 +1,155 @@
+/*
+* This script make #search-result-wrapper switch to unloaded or shown automatically.
+* v2.0
+* https://github.com/cotes2020/jekyll-theme-chirpy
+* © 2018-2019 Cotes Chung
+* MIT License
+*/
+
+$(function() {
+
+  var btnSbTrigger = $("#sidebar-trigger");
+  var btnSearchTrigger = $("#search-trigger");
+  var btnCancel = $("#search-cancel");
+  var btnClear = $("#search-cleaner");
+
+  var main = $("#main");
+  var topbarTitle = $("#topbar-title");
+  var searchWrapper = $("#search-wrapper");
+  var resultWrapper = $("#search-result-wrapper");
+  var results = $("#search-results");
+  var input = $("#search-input");
+  var hints = $("#search-hints");
+
+
+  /*--- Actions in small screens (Sidebar unloaded) ---*/
+
+  var scrollBlocker = (function() {
+    var offset = 0;
+    return {
+      block() {
+        offset = $(window).scrollTop();
+      },
+      release() {
+        $("html,body").scrollTop(offset);
+      },
+      getOffset() {
+        return offset;
+      }
+    };
+  }());
+
+  var mobileSearchBar = (function() {
+    return {
+      on() {
+        btnSbTrigger.addClass("unloaded");
+        topbarTitle.addClass("unloaded");
+        btnSearchTrigger.addClass("unloaded");
+        searchWrapper.addClass("d-flex");
+        btnCancel.addClass("loaded");
+      },
+      off() {
+        btnCancel.removeClass("loaded");
+        searchWrapper.removeClass("d-flex");
+        btnSbTrigger.removeClass("unloaded");
+        topbarTitle.removeClass("unloaded");
+        btnSearchTrigger.removeClass("unloaded");
+      }
+    };
+  }());
+
+  var resultSwitch = (function() {
+    var visable = false;
+
+    return {
+      on() {
+        if (!visable) {
+          resultWrapper.removeClass("unloaded");
+          main.addClass("hidden");
+
+          visable = true;
+          scrollBlocker.block();
+        }
+      },
+      off() {
+        if (visable) {
+          results.empty();
+          if (hints.hasClass("unloaded")) {
+            hints.removeClass("unloaded");
+          }
+          resultWrapper.addClass("unloaded");
+          btnClear.removeClass("visable");
+          main.removeClass("hidden");
+
+          input.val("");
+          visable = false;
+
+          scrollBlocker.release();
+        }
+      },
+      isVisable() {
+        return visable;
+      }
+    };
+
+  }());
+
+
+  function isMobileView() {
+    return btnCancel.hasClass("loaded");
+  }
+
+  btnSearchTrigger.click(function() {
+    mobileSearchBar.on();
+    resultSwitch.on();
+    input.focus();
+  });
+
+  btnCancel.click(function() {
+    mobileSearchBar.off();
+    resultSwitch.off();
+  });
+
+  input.focus(function() {
+    searchWrapper.addClass("input-focus");
+  });
+
+  input.focusout(function() {
+    searchWrapper.removeClass("input-focus");
+  });
+
+  input.on("keyup", function(e) {
+    if (e.keyCode === 8 && input.val() === "") {
+      if (!isMobileView()) {
+        resultSwitch.off();
+      } else {
+        hints.removeClass("unloaded");
+      }
+    } else {
+      if (input.val() !== "") {
+        resultSwitch.on();
+
+        if (!btnClear.hasClass("visible")) {
+          btnClear.addClass("visable");
+        }
+
+        if (isMobileView()) {
+          hints.addClass("unloaded");
+        }
+      }
+    }
+  });
+
+  btnClear.on("click", function() {
+    input.val("");
+    if (isMobileView()) {
+      hints.removeClass("unloaded");
+      results.empty();
+    } else {
+      resultSwitch.off();
+    }
+    input.focus();
+    btnClear.removeClass("visable");
+  });
+
+});

assets/js/_commons/sidebar.js

@@ -11,24 +11,24 @@ $(function() {
   var sidebarUtil = (function() {
     const ATTR_DISPLAY = "sidebar-display";
     var isExpanded = false;
-    var body = $('body');
+    var body = $("body");
 
     return {
-      toggle: function() {
-        if (isExpanded == false) {
-          body.attr(ATTR_DISPLAY, '');
+      toggle() {
+        if (isExpanded === false) {
+          body.attr(ATTR_DISPLAY, "");
         } else {
           body.removeAttr(ATTR_DISPLAY);
         }
 
         isExpanded = !isExpanded;
       }
-    }
+    };
 
-  })();
+  }());
 
   $("#sidebar-trigger").click(sidebarUtil.toggle);
 
-  $('#mask').click(sidebarUtil.toggle);
+  $("#mask").click(sidebarUtil.toggle);
 
 });

assets/js/_commons/topbar-switch.js

@@ -0,0 +1,69 @@
+/*
+ * Hide Header on scroll down
+ * v2.0
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2018-2019 Cotes Chung
+ * MIT License
+ */
+
+$(function() {
+
+  var didScroll;
+  var lastScrollTop = 0;
+  var delta = 5;
+  var topbarHeight = $("#topbar-wrapper").outerHeight();
+
+  function hasScrolled() {
+    var st = $(this).scrollTop();
+
+    /* Make sure they scroll more than delta */
+    if (Math.abs(lastScrollTop - st) <= delta) {
+      return;
+    }
+
+    if (st > lastScrollTop && st > topbarHeight) {
+      /* Scroll Down */
+      $("#topbar-wrapper").removeClass("topbar-down").addClass("topbar-up");
+
+      if ($("#toc-wrapper").length > 0) {
+        $("#toc-wrapper").removeClass("topbar-down");
+      }
+
+      if ($(".access").length > 0) {
+        $(".access").removeClass("topbar-down");
+      }
+
+      if ($("#search-input").is(":focus")) {
+        $("#search-input").blur(); /* remove focus */
+      }
+
+    } else {
+      /* Scroll Up */
+      if (st + $(window).height() < $(document).height()) {
+        $("#topbar-wrapper").removeClass("topbar-up").addClass("topbar-down");
+        if ($("#toc-wrapper").length > 0) {
+          $("#toc-wrapper").addClass("topbar-down");
+        }
+        if ($(".access").length > 0) {
+          $(".access").addClass("topbar-down");
+        }
+      }
+    }
+
+    lastScrollTop = st;
+  }
+
+  $(window).scroll(function(event) {
+    if ($("#topbar-title").is(":hidden")) { /* Not in small screens */
+      didScroll = true;
+    }
+  });
+
+  setInterval(function() {
+    if (didScroll) {
+      hasScrolled();
+      didScroll = false;
+    }
+  }, 250);
+
+});

assets/js/_commons/topbar-title.js

@@ -0,0 +1,47 @@
+/*
+ * Topbar title auto change while scrolling in mobile screens.
+ * v2.0
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2018-2019 Cotes Chung
+ * MIT License
+*/
+
+$(function() {
+
+  var DEFAULT = $("#topbar-title").text().trim();
+  var title = ($("div.post>h1").length > 0) ?
+          $("div.post>h1").text().trim() : $("h1").text().trim();
+
+  if ($("#page-category").length || $("#page-tag").length) {
+    /* The title in Category or Tag page will be "<title> <count_of_posts>" */
+    if (/\s/.test(title)) {
+      title = title.replace(/[0-9]/g, "").trim();
+    }
+  }
+
+  /* Replace topbar title while scroll screens. */
+  $(window).scroll(function () {
+    if ($("#post-list").length /* in Home page */
+      || $("div.post>h1").is(":hidden") /* is tab pages */
+      || $("#topbar-title").is(":hidden") /* not mobile screens */
+      || $("#sidebar.sidebar-expand").length) { /* when the sidebar trigger is clicked */
+      return false;
+    }
+
+    if ($(this).scrollTop() >= 95) {
+      if ($("#topbar-title").text() !== title) {
+        $("#topbar-title").text(title);
+      }
+    } else {
+      if ($("#topbar-title").text() !== DEFAULT) {
+        $("#topbar-title").text(DEFAULT);
+      }
+    }
+  });
+
+  /* Click title remove hover effect. */
+  $("#topbar-title").click(function() {
+    $("body,html").animate({scrollTop: 0}, 800);
+  });
+
+});

assets/js/_home-post.js

@@ -0,0 +1,22 @@
+/*!
+  JS group for layout Home or Post
+  Chirpy v2.3
+  https://github.com/cotes2020/jekyll-theme-chirpy
+  © 2020 Cotes Chung
+  MIT License
+*/
+
+{% include_relative _commons.js %}
+
+{% include_relative _utils/timeago.js %}
+
+
+{% if site.google_analytics.pv.enabled %}
+
+  {% include_relative _pv-config.js %}
+
+  {% include_relative _utils/pageviews.js %}
+
+  {% include_relative lib/_countUp.min.js %}
+
+{% endif %}

assets/js/_pv-config.js

@@ -0,0 +1,14 @@
+/*!
+  PV configuration and Javascript conversion.
+*/
+
+const proxyEndpoint = "{{ site.google_analytics.pv.proxy_endpoint }}";
+
+
+{% if site.google_analytics.pv.cache and site.google_analytics.pv.enabled %}
+  {% assign enabled = true %}
+{% else %}
+  {% assign enabled = false %}
+{% endif %}
+
+const pvCacheEnabled = {{ enabled }};

assets/js/_src/_commons/back-to-top.js

@@ -1,18 +0,0 @@
-/*
-Reference: https://bootsnipp.com/snippets/featured/link-to-top-page
-*/
-$(window).scroll(function() {
-  if ($(this).scrollTop() > 50
-      && $('#sidebar-trigger').css('display') == 'none') {
-    $('#back-to-top').fadeIn();
-  } else {
-    $('#back-to-top').fadeOut();
-  }
-});
-
-$(function() {
-  $('#back-to-top').click(function() {
-    $('body,html').animate({scrollTop: 0}, 800);
-    return false;
-  });
-});

assets/js/_src/_commons/copy-link.js

@@ -1,20 +0,0 @@
-/*
-* Copy current page url to clipboard.
-* v2.1
-* https://github.com/cotes2020/jekyll-theme-chirpy
-* © 2020 Cotes Chung
-* MIT License
-*/
-
-function copyLink(url) {
-  if (!url || 0 === url.length)
-  url = window.location.href;
-  var $temp = $("<input>");
-
-  $("body").append($temp);
-  $temp.val(url).select();
-  document.execCommand("copy");
-  $temp.remove();
-
-  alert("Link copied successfully!");
-}

assets/js/_src/_commons/search-display.js

@@ -1,154 +0,0 @@
-/*
-* This script make #search-result-wrapper switch to unloaded or shown automatically.
-* v2.0
-* https://github.com/cotes2020/jekyll-theme-chirpy
-* © 2018-2019 Cotes Chung
-* MIT License
-*/
-
-$(function() {
-
-  var btnSbTrigger = $('#sidebar-trigger');
-  var btnSearchTrigger = $('#search-trigger');
-  var btnCancel = $('#search-cancel');
-  var btnClear = $('#search-cleaner');
-
-  var main = $('#main');
-  var topbarTitle = $('#topbar-title');
-  var searchWrapper = $('#search-wrapper');
-  var resultWrapper = $('#search-result-wrapper');
-  var results = $('#search-results');
-  var input = $('#search-input');
-  var hints = $('#search-hints');
-
-
-  /*--- Actions in small screens (Sidebar unloaded) ---*/
-
-  var scrollBlocker = (function() {
-    var offset = 0;
-    return {
-      block: function() {
-        offset = $(window).scrollTop();
-      },
-      release: function() {
-        $('html,body').scrollTop(offset);
-      },
-      getOffset: function() {
-        return offset;
-      }
-    }
-  })();
-
-  var mobileSearchBar = (function() {
-    return {
-      on: function() {
-        btnSbTrigger.addClass('unloaded');
-        topbarTitle.addClass('unloaded');
-        btnSearchTrigger.addClass('unloaded');
-        searchWrapper.addClass('d-flex');
-        btnCancel.addClass('loaded');
-      },
-      off: function() {
-        btnCancel.removeClass('loaded');
-        searchWrapper.removeClass('d-flex');
-        btnSbTrigger.removeClass('unloaded');
-        topbarTitle.removeClass('unloaded');
-        btnSearchTrigger.removeClass('unloaded');
-      }
-    }
-  })();
-
-  var resultSwitch = (function() {
-    var visable = false;
-
-    return {
-      on: function() {
-        if (!visable) {
-          resultWrapper.removeClass('unloaded');
-          main.addClass('hidden');
-
-          visable = true;
-          scrollBlocker.block();
-        }
-      },
-      off: function() {
-        if (visable) {
-          results.empty();
-          if (hints.hasClass('unloaded')) {
-            hints.removeClass('unloaded');
-          }
-          resultWrapper.addClass('unloaded');
-          btnClear.removeClass('visable');
-          main.removeClass('hidden');
-
-          input.val('');
-          visable = false;
-
-          scrollBlocker.release();
-        }
-      },
-      isVisable: function() {
-        return visable;
-      }
-    }
-  })();
-
-
-  function isMobileView() {
-    return btnCancel.hasClass('loaded');
-  }
-
-  btnSearchTrigger.click(function() {
-    mobileSearchBar.on();
-    resultSwitch.on();
-    input.focus();
-  });
-
-  btnCancel.click(function() {
-    mobileSearchBar.off();
-    resultSwitch.off();
-  });
-
-  input.focus(function() {
-    searchWrapper.addClass('input-focus');
-  });
-
-  input.focusout(function() {
-    searchWrapper.removeClass('input-focus');
-  });
-
-  input.on('keyup', function(e) {
-    if (e.keyCode == 8 && input.val() == '') {
-      if (!isMobileView()) {
-        resultSwitch.off();
-      } else {
-        hints.removeClass('unloaded');
-      }
-    } else {
-      if (input.val() != '') {
-        resultSwitch.on();
-
-        if (!btnClear.hasClass('visible')) {
-          btnClear.addClass('visable');
-        }
-
-        if (isMobileView()) {
-          hints.addClass('unloaded');
-        }
-      }
-    }
-  });
-
-  btnClear.on('click', function() {
-    input.val('');
-    if (isMobileView()) {
-      hints.removeClass('unloaded');
-      results.empty();
-    } else {
-      resultSwitch.off();
-    }
-    input.focus();
-    btnClear.removeClass('visable');
-  });
-
-});

assets/js/_src/_commons/topbar-switch.js

@@ -1,66 +0,0 @@
-/*
- * Hide Header on scroll down
- * v2.0
- * https://github.com/cotes2020/jekyll-theme-chirpy
- * © 2018-2019 Cotes Chung
- * MIT License
- */
-$(function() {
-
-  var didScroll;
-  var lastScrollTop = 0;
-  var delta = 5;
-  var topbarHeight = $('#topbar-wrapper').outerHeight();
-
-  $(window).scroll(function(event) {
-    if ($("#topbar-title").is(":hidden")) { // Not in small screens
-      didScroll = true;
-    }
-  });
-
-  setInterval(function() {
-    if (didScroll) {
-      hasScrolled();
-      didScroll = false;
-    }
-  }, 250);
-
-  function hasScrolled() {
-    var st = $(this).scrollTop();
-
-    // Make sure they scroll more than delta
-    if (Math.abs(lastScrollTop - st) <= delta)
-      return;
-
-    if (st > lastScrollTop && st > topbarHeight) {
-      // Scroll Down
-      $('#topbar-wrapper').removeClass('topbar-down').addClass('topbar-up');
-
-      if ( $('#toc-wrapper').length > 0) {
-        $('#toc-wrapper').removeClass('topbar-down');
-      }
-
-      if ( $('.access').length > 0) {
-        $('.access').removeClass('topbar-down');
-      }
-
-      if ($('#search-input').is(':focus')) {
-        $('#search-input').blur(); // remove focus
-      }
-
-    } else {
-      // Scroll Up
-      if (st + $(window).height() < $(document).height()) {
-        $('#topbar-wrapper').removeClass('topbar-up').addClass('topbar-down');
-        if ( $('#toc-wrapper').length > 0) {
-          $('#toc-wrapper').addClass('topbar-down');
-        }
-        if ( $('.access').length > 0) {
-          $('.access').addClass('topbar-down');
-        }
-      }
-    }
-
-    lastScrollTop = st;
-  }
-});

assets/js/_src/_commons/topbar-title.js

@@ -1,46 +0,0 @@
-/*
- * Topbar title auto change while scrolling in mobile screens.
- * v2.0
- * https://github.com/cotes2020/jekyll-theme-chirpy
- * © 2018-2019 Cotes Chung
- * MIT License
-*/
-$(function(){
-
-  var DEFAULT = $("#topbar-title").text().trim();
-  var title = ($("div.post>h1").length > 0) ?
-          $("div.post>h1").text().trim() : $("h1").text().trim();
-
-  if ($("#page-category").length || $("#page-tag").length) {
-    /* The title in Category or Tag page will be '<title> <count_of_posts>' */
-    if (/\s/.test(title)) {
-      title = title.replace(/[0-9]/g, '').trim();
-    }
-  }
-
-  // Replace topbar title while scroll screens.
-  $(window).scroll(function () {
-    if ($("#post-list").length // in Home page
-      || $("div.post>h1").is(":hidden") // is tab pages
-      || $("#topbar-title").is(":hidden") // not mobile screens
-      || $("#sidebar.sidebar-expand").length) { // when the sidebar trigger is clicked
-      return false;
-    }
-
-    if ($(this).scrollTop() >= 95) {
-      if ($("#topbar-title").text() != title) {
-        $("#topbar-title").text(title);
-      }
-    } else {
-      if ($("#topbar-title").text() != DEFAULT) {
-        $("#topbar-title").text(DEFAULT);
-      }
-    }
-  })
-
-  // Click title remove hover effect.
-  $('#topbar-title').click(function() {
-    $('body,html').animate({scrollTop: 0}, 800);
-  });
-
-});

assets/js/_src/category-collapse.js

@@ -1,33 +0,0 @@
-/*
- * Tab 'Categories' expand/close effect.
- * v2.0
- * https://github.com/cotes2020/jekyll-theme-chirpy
- * © 2018-2019 Cotes Chung
- * MIT License
- */
-
-$(function() {
-  var child_prefix = "l_";
-  var parent_prefix = "h_";
-
-  // close up top-category
-  $(".collapse").on("hide.bs.collapse", function() { // Bootstrap collapse events.
-    var parent_id = parent_prefix + $(this).attr('id').substring(child_prefix.length);
-    if (parent_id) {
-      $("#" + parent_id + " .far.fa-folder-open").attr("class", "far fa-folder fa-fw");
-      $("#" + parent_id + " i.fas").addClass("rotate");
-      $("#" + parent_id).removeClass("hide-border-bottom");
-    }
-  });
-
-  // expand the top category
-  $(".collapse").on("show.bs.collapse", function() {
-    var parent_id = parent_prefix + $(this).attr('id').substring(child_prefix.length);
-    if (parent_id) {
-      $("#" + parent_id + " .far.fa-folder").attr("class", "far fa-folder-open fa-fw");
-      $("#" + parent_id + " i.fas").removeClass("rotate");
-      $("#" + parent_id).addClass("hide-border-bottom");
-    }
-  });
-
-});

assets/js/_src/pageviews.js

@@ -1,225 +0,0 @@
-/**
- * Count pageviews form GA or local cache file.
- *
- * Dependences:
- *   - jQuery
- *   - countUp.js <https://github.com/inorganik/countUp.js>
- *
- * v2.0
- * https://github.com/cotes2020/jekyll-theme-chirpy
- * © 2018-2019 Cotes Chung
- * MIT License
- */
-
-function countUp(min, max, destId) {
-  if (min < max) {
-    var numAnim = new CountUp(destId, min, max);
-    if (!numAnim.error) {
-      numAnim.start();
-    } else {
-      console.error(numAnim.error);
-    }
-  }
-}
-
-
-function countPV(path, rows) {
-  /* path permalink looks like: '/posts/post-title/' */
-  var fileName = path.replace(/\/posts\//g, '').replace(/\//g, '.html'); /* e.g. post-title.html */
-  var count = 0;
-
-  var _v2_url = path.replace(/posts\//g, ''); /* the v2.0+ blog permalink: "/post-title/" */
-
-  for (var i = 0; i < rows.length; ++i) {
-    var gaPath = rows[i][0];
-    if (gaPath == path ||
-      gaPath == _v2_url ||
-      gaPath.concat('/') == _v2_url ||
-      gaPath.slice(gaPath.lastIndexOf('/') + 1) === fileName) { // old permalink record
-      count += parseInt(rows[i][1]);
-    }
-  }
-
-  return count;
-}
-
-
-function tacklePV(rows, path, elem, hasInit) {
-  var count = countPV(path, rows);
-  count = (count == 0 ? 1 : count);
-
-  if (!hasInit) {
-    elem.text(new Intl.NumberFormat().format(count));
-  } else {
-    var initCount = parseInt(elem.text().replace(/,/g, ''));
-    if (count > initCount) {
-      countUp(initCount, count, elem.attr('id'));
-    }
-  }
-}
-
-
-function displayPageviews(data) {
-  if (data === undefined) {
-    return;
-  }
-
-  var hasInit = getInitStatus();
-  var rows = data.rows;
-
-  if ($("#post-list").length > 0) { // the Home page
-    $(".post-preview").each(function() {
-      var path = $(this).children("h1").children("a").attr("href");
-      tacklePV(rows, path, $(this).find('.pageviews'), hasInit);
-    });
-
-  } else if ($(".post").length > 0) { // the post
-    var path = window.location.pathname;
-    tacklePV(rows, path, $('#pv'), hasInit);
-  }
-}
-
-
-var getInitStatus = (function() {
-  var hasInit = false;
-  return function() {
-    let ret = hasInit;
-    if (!hasInit) {
-      hasInit = true;
-    }
-    return ret;
-  }
-})();
-
-
-var PvCache = (function() {
-  const KEY_PV = "pv";
-  const KEY_CREATION = "pv-created-date";
-  const KEY_PV_TYPE = "pv-type";
-
-  var PvType = {
-    ORIGIN: "origin",
-    PROXY: "proxy"
-  };
-
-  function get(key) {
-    return localStorage.getItem(key);
-  }
-
-  function set(key, val) {
-    localStorage.setItem(key, val);
-  }
-
-  return {
-    getData: function() {
-      return JSON.parse(localStorage.getItem(KEY_PV) );
-    },
-    saveOriginCache: function(pv) {
-      set(KEY_PV, pv);
-      set(KEY_PV_TYPE, PvType.ORIGIN );
-      set(KEY_CREATION, new Date().toJSON() );
-    },
-    saveProxyCache: function(pv) {
-      set(KEY_PV, pv);
-      set(KEY_PV_TYPE, PvType.PROXY );
-      set(KEY_CREATION, new Date().toJSON() );
-    },
-    isOriginCache: function() {
-      return get(KEY_PV_TYPE) == PvType.ORIGIN;
-    },
-    isProxyCache: function() {
-      return get(KEY_PV_TYPE) == PvType.PROXY;
-    },
-    isExpired: function() {
-      if (PvCache.isOriginCache() ) {
-        let date = new Date(get(KEY_CREATION));
-        date.setDate(date.getDate() + 1); // fetch origin-data every day
-        return Date.now() >= date.getTime();
-
-      } else if (PvCache.isProxyCache() ) {
-        let date = new Date(get(KEY_CREATION) );
-        date.setHours(date.getHours() + 1); // proxy-data is updated every hour
-        return Date.now() >= date.getTime();
-      }
-      return false;
-    },
-    getAllPagevies: function() {
-      return PvCache.getData().totalsForAllResults["ga:pageviews"];
-    },
-    newerThan: function(pv) {
-      return PvCache.getAllPagevies() > pv.totalsForAllResults["ga:pageviews"];
-    }
-  };
-
-})(); // PvCache
-
-
-function fetchOriginPageviews(pvData) {
-  if (pvData === undefined) {
-    return;
-  }
-  displayPageviews(pvData);
-  PvCache.saveOriginCache(JSON.stringify(pvData));
-}
-
-
-function fetchProxyPageviews() {
-  let proxy = JSON.parse(proxyData); // see file '/assets/data/pv-data.json'
-  $.ajax({
-    type: 'GET',
-    url: proxy.url,
-    dataType: 'jsonp',
-    jsonpCallback: "displayPageviews",
-    success: function(data, textStatus, jqXHR) {
-      PvCache.saveProxyCache(JSON.stringify(data));
-    },
-    error: function(jqXHR, textStatus, errorThrown) {
-      console.log("Failed to load pageviews from proxy server: " + errorThrown);
-    }
-  });
-}
-
-
-$(function() {
-
-  if ($('.pageviews').length > 0) {
-
-    let cache = PvCache.getData();
-
-    if (cache) {
-      if (PvCache.isExpired()) {
-        if (PvCache.isProxyCache() ) {
-          let originPvData = pageviews ? JSON.parse(pageviews) : undefined;
-          if (originPvData) {
-            if (PvCache.newerThan(originPvData)) {
-              displayPageviews(cache);
-            } else {
-              fetchOriginPageviews(originPvData);
-            }
-          }
-
-          fetchProxyPageviews();
-
-        } else if (PvCache.isOriginCache() ) {
-          fetchOriginPageviews(originPvData);
-          fetchProxyPageviews();
-        }
-
-      } else { // still valid
-        displayPageviews(cache);
-
-        if (PvCache.isOriginCache() ) {
-          fetchProxyPageviews();
-        }
-
-      }
-
-    } else {
-      let originPvData = pageviews ? JSON.parse(pageviews) : undefined;
-      fetchOriginPageviews(originPvData);
-      fetchProxyPageviews();
-    }
-
-  }
-
-});

assets/js/_src/timeago.js

@@ -1,78 +0,0 @@
-/*
- * Caculate the Timeago
- * v2.0
- * https://github.com/cotes2020/jekyll-theme-chirpy
- * © 2019 Cotes Chung
- * MIT Licensed
- */
-
-$(function() {
-
-  function timeago(date, isLastmod) {
-    var now = new Date();
-    var past = new Date(date);
-    var seconds = Math.floor((now - past) / 1000);
-
-    var year = Math.floor(seconds / 31536000);
-    if (year >= 1) {
-      return year + " year" + (year > 1 ? "s" : "") + " ago";
-    }
-
-    var month = Math.floor(seconds / 2592000);
-    if (month >= 1) {
-      return month + " month" + (month > 1 ? "s" : "") + " ago";
-    }
-
-    var week = Math.floor(seconds / 604800);
-    if (week >= 1) {
-      return week + " week" + (week > 1 ? "s" : "") + " ago";
-    }
-
-    var day = Math.floor(seconds / 86400);
-    if (day >= 1) {
-      return day + " day" + (day > 1 ? "s" : "") + " ago";
-    }
-
-    var hour = Math.floor(seconds / 3600);
-    if (hour >= 1) {
-      return hour + " hour" + (hour > 1 ? "s" : "") + " ago";
-    }
-
-    var minute = Math.floor(seconds / 60);
-    if (minute >= 1) {
-      return minute + " minute" + (minute > 1 ? "s" : "") + " ago";
-    }
-
-    return (isLastmod? "just" : "Just") + " now";
-  }
-
-
-  function updateTimeago() {
-    $(".timeago").each(function() {
-      if ($(this).children("i").length > 0) {
-        var isLastmod = $(this).hasClass('lastmod');
-        var node = $(this).children("i");
-        var date = node.text();   /* ISO Dates: 'YYYY-MM-DDTHH:MM:SSZ' */
-        $(this).text(timeago(date, isLastmod));
-        $(this).append(node);
-      }
-    });
-
-    if (vote == 0 && intervalId != undefined) {
-      clearInterval(intervalId);  /* stop interval */
-    }
-    return vote;
-  }
-
-
-  var vote = $(".timeago").length;
-  if (vote == 0) {
-    return;
-  }
-
-  if (updateTimeago() > 0) {      /* run immediately */
-    vote = $(".timeago").length;  /* resume */
-    var intervalId = setInterval(updateTimeago, 60000); /* loop every minutes */
-  }
-
-});

assets/js/_utils/category-collapse.js

@@ -0,0 +1,33 @@
+/*
+ * Tab 'Categories' expand/close effect.
+ * v2.0
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2018-2019 Cotes Chung
+ * MIT License
+ */
+
+$(function() {
+  var childPrefix = "l_";
+  var parentPrefix = "h_";
+
+  /* close up top-category */
+  $(".collapse").on("hide.bs.collapse", function() { /* Bootstrap collapse events. */
+    var parentId = parentPrefix + $(this).attr("id").substring(childPrefix.length);
+    if (parentId) {
+      $("#" + parentId + " .far.fa-folder-open").attr("class", "far fa-folder fa-fw");
+      $("#" + parentId + " i.fas").addClass("rotate");
+      $("#" + parentId).removeClass("hide-border-bottom");
+    }
+  });
+
+  /* expand the top category */
+  $(".collapse").on("show.bs.collapse", function() {
+    var parentId = parentPrefix + $(this).attr("id").substring(childPrefix.length);
+    if (parentId) {
+      $("#" + parentId + " .far.fa-folder").attr("class", "far fa-folder-open fa-fw");
+      $("#" + parentId + " i.fas").removeClass("rotate");
+      $("#" + parentId).addClass("hide-border-bottom");
+    }
+  });
+
+});

assets/js/_utils/img-hyperlink.js

@@ -0,0 +1,16 @@
+/*
+ * Find out the <a> tag contains an image and mark it.
+ *
+ * v2.5.1
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2020 Cotes Chung
+ * MIT Licensed
+ */
+
+$(function() {
+
+  var MARK="img-hyperlink";
+
+  $("a:has(img)").addClass(MARK);
+  
+});