Bump version to 5.1.0

Bootstrap 4.6.x has its own class `.shadow`

.github/CONTRIBUTING.md

@@ -1,15 +1,42 @@
 # How to Contribute
 
-I want to thank you for sparing time to improve this project! Here are some guidelines for contributing：
+We want to thank you for sparing time to improve this project! Here are some guidelines for contributing：
 
-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. 
+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.
+
+## Basic Process
 
 Generally, contribute to the project by:
 
 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`).
+2. Create a new branch from the default branch and give it a descriptive name (e.g., `my-new-feature`, `fix-a-bug`).
-3. After completing the development, commit and push to remote.
+3. After completing the development, submit a new _Pull Request_.
-4. Submit a new pull request.
+
+## Modifying JavaScript
+
+If your contribution involves JS modification, please read the following sections.
+
+### Inline Scripts
+
+If you need to add comments to the inline JS (the JS code between the tags `<script>` and `</script>`), please use `/**/` instead of two slashes `//`. Because the HTML will be compressed by [jekyll-compress-html](https://github.com/penibelst/jekyll-compress-html) during deployment, but it cannot handle the `//` properly. And this will disrupt the structure of the compressed HTML.
+
+### External Scripts
+
+If you need to add or modify JavaScripts in the directory `_javascript`, you need to install [Gulp.js](https://gulpjs.com/docs/en/getting-started/quick-start).
+
+During development, real-time debugging can be performed through the following commands:
+
+```console
+$ bash tools/run.sh
+```
+
+Open another terminal tab and run:
+
+```console
+$ gulp dev # Type 'Ctrl + C' to stop
+```
+
+After debugging, run the command `gulp` (without any argument) will automatically output the compressed files to the directory `assests/js/dist/`.
 
 ---
 

.github/workflows/ci.yml

@@ -2,15 +2,15 @@ name: 'Continuous Integration'
 on:
   push:
     branches-ignore:
-      - 'production'
+      - 'release/**'
+      - 'docs'
     tags-ignore:
-      - '*'
+      - '**'
     paths-ignore:
       - '.github/**'
       - '!.github/workflows/ci.yml'
       - '.travis.yml'
       - '.gitignore'
-      - 'docs/**'
       - 'README.md'
       - 'LICENSE'
   pull_request:

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

@@ -2,7 +2,7 @@ name: 'Automatic build'
 on:
   push:
     branches:
-      - master
+      - main
     paths-ignore:
       - .gitignore
       - README.md

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "assets/lib"]
+	path = assets/lib
+	url = https://github.com/cotes2020/chirpy-static-assets.git

.travis.yml

@@ -1,42 +1,41 @@
 os: linux
 dist: bionic
+language: ruby
+rvm: 2.7.0
 
-language: minimal
+addons:
+  apt:
+    packages:
+      - libcurl4-openssl-dev  # to avoid SSL error (for htmlproofer)
 
-branches:
+# Overriding to drop the `--development` flag which requires the Gemfile.lock at build
-  only:
+install: bundle install --jobs=3 --retry=3 --path=vendor/bundle
-    - /^release\/(\d)+(\.(\d)+){1}$/
+
+before_script: git -C "$HOME" clone "$BUILDER_REPO" --depth=1 -q
 
 jobs:
   include:
-    - name: Deploy
+    - stage: Upgrade
-      language: ruby
-      rvm: 2.7.0
-      addons:
-        apt:
-          packages:
-            # required to avoid SSL error (for htmlproofer)
-            - libcurl4-openssl-dev
-      cache:
-        directories:
-          - $TRAVIS_BUILD_DIR/vendor/bundle
-      before_install:
-        # match the Gemfile.lock, travis' bundler is 2.1.2
-        - gem install bundler:2.2.4
-        - bundle config path 'vendor/bundle'
-      install:
-        # overriding to drop the travis `--development` flag
-        - bundle install --jobs=3 --retry=3
-      script:
-        - eval "$BUILD_CMD"
       git:
         depth: false  # for posts' lastmod
-
+      script: eval "$BUILD_CMD"
-    - name: Flush Starter
+    - stage: Starter
+      language: minimal
+      install: true   # skip install step
       script: eval "$FLUSH_STARTER"
+    - stage: Docs
+      cache: bundler
+      git:
+        depth: false  # for posts' lastmod
+      script: eval "$DOCS_CMD"
 
-before_script:
+stages:
-  - git -C "$HOME" clone "$BUILDER_REPO" --depth=1 -q
+  - name: Upgrade
+    if: branch =~ /^v(\d)+(\.(\d)+){2}$/ OR tag IS present
+  - name: Starter
+    if: branch =~ /^v(\d)+(\.(\d)+){2}$/ OR tag IS present
+  - name: Docs
+    if: branch = docs
 
 notifications:
   email:

README.md

@@ -1,9 +1,3 @@
-<div align="right">
-
-  EN / [中文](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/docs/README.zh-CN.md)
-
-</div>
-
 <div align="center">
 
   # Chirpy Jekyll Theme
@@ -18,73 +12,39 @@
 
   [**Live Demo →**](https://cotes2020.github.io/chirpy-demo)
 
-  [![Devices Mockup](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/commons/devices-mockup.png)](https://cotes2020.github.io/chirpy-demo)
+  [![Devices Mockup](https://raw.githubusercontent.com/cotes2020/chirpy-images/main/commons/devices-mockup.png)](https://cotes2020.github.io/chirpy-demo)
 
 </div>
 
 ## Features
 
 - Localized Layout
-- Configurable Theme Mode
+- Dark/Light Theme Mode
 - Pinned Posts
 - Hierarchical Categories
 - Last Modified Date for Posts
 - Table of Contents
-- Automatically Recommend Related Posts
+- Auto-generated Related Posts
 - Syntax Highlighting
 - Mathematical Expressions
 - Mermaid Diagram & Flowchart
+- Disqus/Utterances/Giscus Comments
 - Search
 - Atom Feeds
-- Disqus Comments
 - Google Analytics
-- GA Pageviews Reporting (Advanced)
+- GA Pageviews Reporting
 - SEO & Performance Optimization
 
-## Prerequisites
 
-Follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`.
+## Quick Start
 
-## Installation
+Before starting, please follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`. In addition, [Git](https://git-scm.com/) is also required to be installed.
 
-### Creating a New Site
+### Step 1. Creating a New Site
 
-There are two ways to create a new repository for this theme:
+Create a new repository from the [**Chirpy Starter**](https://github.com/cotes2020/chirpy-starter/generate) and name it `<GH_USERNAME>.github.io`, where `GH_USERNAME` represents your GitHub username.
 
-- [**Using the Chirpy Starter**](#option-1-using-the-chirpy-starter) - Easy to upgrade, isolates irrelevant project files so you can focus on writing.
+### Step 2. Installing Dependencies
-- [**Forking on GitHub**](#option-2-forking-on-github) - Convenient for custom development, but difficult to upgrade. Unless you are familiar with Jekyll and are determined to tweak or contribute to this project, this approach is not recommended.
-
-#### Option 1. Using the Chirpy Starter
-
-Create a new repository from the [**Chirpy Starter**][use-starter] and name it `<GH_USERNAME>.github.io`, where `GH_USERNAME` represents your GitHub username.
-
-#### Option 2. Forking on GitHub
-
-[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) on GitHub and rename it to `<GH_USERNAME>.github.io`. Please note that the default branch code is in development.  If you want the site to be stable, please switch to the [latest tag][latest-tag] and start writing.
-
-And then execute:
-
-```console
-$ bash tools/init.sh
-```
-
-> **Note**: If you don't want to deploy your site on GitHub Pages, append option `--no-gh` at the end of the above command.
-
-The above command will:
-
-1. Removes some files or directories from your repository:
-
-    - `.travis.yml`
-    - files under `_posts`
-    - folder `docs`
-
-2. If the option `--no-gh` is provided, the directory `.github` will be deleted. Otherwise, set up the GitHub Action workflow by removing the extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in the folder `.github`.
-
-3. Removes item `Gemfile.lock` from `.gitignore`.
-
-4. Creates a new commit to save the changes automatically.
-
-### Installing Dependencies
 
 Before running for the first time, go to the root directory of your site, and install dependencies as follows:
 
@@ -92,32 +52,15 @@ Before running for the first time, go to the root directory of your site, and in
 $ bundle
 ```
 
-## Usage
+### Step 3. Running Local Server
 
-### Configuration
+Run the following command in the root directory of the site:
-
-Update the variables of `_config.yml` as needed. Some of them are typical options:
-
-- `url`
-- `avatar`
-- `timezone`
-- `lang`
-
-### Customing Stylesheet
-
-If you need to customize the stylesheet, copy the theme's `assets/css/style.scss` to the same path on your Jekyll site, and then add the custom style at the end of the style file.
-
-Starting from [`v4.1.0`][chirpy-4.1.0], if you want to overwrite the SASS variables defined in `_sass/addon/variables.scss`, create a new file `_sass/variables-hook.scss` and assign new values to the target variable in it.
-
-### Running Local Server
-
-You may want to preview the site contents before publishing, so just run it by:
 
 ```console
 $ bundle exec jekyll s
 ```
 
-Or run the site on Docker with the following command:
+Or run with Docker:
 
 ```console
 $ docker run -it --rm \
@@ -126,101 +69,23 @@ $ docker run -it --rm \
     jekyll serve
 ```
 
-After a while, the local service will be published at _<http://127.0.0.1:4000>_.
+After a while, navigate to the site at <http://localhost:4000>.
-
-### Deployment
-
-Before the deployment begins, check out 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 starts with a slash, e.g, `/project-name`.
-
-Now you can choose ONE of the following methods to deploy your Jekyll site.
-
-#### Deploy by Using Github Actions
-
-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 GitHub Pages service.
-
-Quickly check the files needed for GitHub Actions build:
-
-- Ensure your Jekyll site has the file `.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [sample file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
-
-- Ensure your Jekyll site has file `tools/deploy.sh`. Otherwise, copy it from here to your Jekyll site.
-
-- Furthermore, if you have committed `Gemfile.lock` to the repo, and your runtime system is not Linux, don't forget to update the platform list in the lock file:
-
-  ```console
-  $ bundle lock --add-platform x86_64-linux
-  ```
-
-After the above steps, rename your repository to `<GH_USERNAME>.github.io` on GitHub.
-
-Now publish your Jekyll site by:
-
-1. Push any commit to remote 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 repository on GitHub. Select the tab _Settings_, then click _Pages_ in the left navigation bar, and then in the section **Source** of _GitHub Pages_, select the `/(root)` directory of branch `gh-pages` as the [publishing source][pages-src]. Remember to click <kbd>Save</kbd> before leaving.
-
-    ![gh-pages-sources](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/posts/20190809/gh-pages-sources.png)
-
-3. Visit your website at the address indicated by GitHub.
-
-#### Manually Build and Deploy
-
-On self-hosted servers, you cannot enjoy the convenience of **GitHub Actions**. Therefore, you should build the site on your local machine and then upload the site files to the server.
-
-Go to the root of the source project, and build your site as follows:
-
-```console
-$ JEKYLL_ENV=production bundle exec jekyll b
-```
-
-Or build the site on Docker:
-
-```console
-$ 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 the target server.
-
-### Upgrading
-
-It depends on how you use the theme:
-
-- If you are using the theme gem (there will be `gem "jekyll-theme-chirpy"` in the `Gemfile`), editing the `Gemfile` and update the version number of the theme gem, for example:
-
-  ```diff
-  - gem "jekyll-theme-chirpy", "~> 3.2", ">= 3.2.1"
-  + gem "jekyll-theme-chirpy", "~> 3.3", ">= 3.3.0"
-  ```
-
-  And then execute the following command:
-
-  ```console
-  $ bundle update jekyll-theme-chirpy
-  ```
-
-  As the version upgrades, the critical files (for details, see the [Startup Template][starter]) and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your repo's files in sync with the latest version of the theme.
-
-- If you forked from the source project (there will be `gemspec` in the `Gemfile` of your site), then merge the [latest upstream tags][latest-tag] into your Jekyll site to complete the upgrade.
-The merge is likely to conflict with your local modifications. Please be patient and careful to resolve these conflicts.
 
 ## Documentation
 
-For more details and a better reading experience, please check out the [tutorials on the demo site](https://cotes2020.github.io/chirpy-demo/categories/tutorial/). In the meanwhile, a copy of the tutorial is also available on the [Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki). Please note that the tutorials on the demo website or Wiki are based on the latest release, and the features of `master` branch are usually ahead of the documentation.
+For more details on usage, please refer to the tutorial on the [demo website](https://cotes2020.github.io/chirpy-demo/) / [wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki). Note that the tutorial is based on the [latest tag](https://github.com/cotes2020/jekyll-theme-chirpy/tags), and the features of the default branch are usually ahead of the documentation.
 
 ## 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).
+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). The avatar and favicon design come from [Clipart Max](https://www.clipartmax.com/middle/m2i8b1m2K9Z5m2K9_ant-clipart-childrens-ant-cute/).
 
-: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.
 
-Last but not least, thank [JetBrains][jb] for providing the open source license.
+Last but not least, thank [JetBrains][jb] for providing the OSS development license.
 
 ## Sponsoring
 
@@ -234,13 +99,6 @@ If you like this theme or find it helpful, please consider sponsoring me, becaus
 
 This work is published under [MIT](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE) License.
 
-[starter]: https://github.com/cotes2020/chirpy-starter
-[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
-[workflow]: https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
-[chirpy-4.1.0]: https://github.com/cotes2020/jekyll-theme-chirpy/releases/tag/v4.1.0
-[pages-src]: https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site
-[latest-tag]: https://github.com/cotes2020/jekyll-theme-chirpy/tags
-
 <!-- ReadMe links -->
 
 [jb]: https://www.jetbrains.com/?from=jekyll-theme-chirpy

_config.yml

@@ -12,6 +12,9 @@ baseurl: ''
 # otherwise, the layout language will use the default value of 'en'.
 lang: en
 
+# Additional parameters for datetime localization, optional. › https://github.com/iamkun/dayjs/tree/dev/src/locale
+prefer_datetime_locale:
+
 # Change to your timezone › http://www.timezoneconverter.com/cgi-bin/findzone/findzone
 timezone: Asia/Shanghai
 
@@ -23,9 +26,7 @@ title: Chirpy                          # the main title
 tagline: A text-focused Jekyll theme   # it will display as the sub-title
 
 description: >-                        # used by seo meta and the atom feed
-  A minimal, portfolio, sidebar,
+  A minimal, responsive, and powerful Jekyll theme for presenting professional writing.
-  bootstrap Jekyll theme with responsive web design
-  and focuses on text presentation.
 
 # fill in the protocol & hostname for your site, e.g., 'https://username.github.io'
 url: ''
@@ -49,13 +50,13 @@ social:
     # - https://www.facebook.com/username
     # - https://www.linkedin.com/in/username
 
-google_site_verification: google_meta_tag_verification # change to your verification string
+google_site_verification:               # fill in to your verification string
 
 # ↑ --------------------------
-
+# The end of `jekyll-seo-tag` settings
 
 google_analytics:
-  id: ''              # fill in your Google Analytics ID
+  id:                 # fill in your Google Analytics ID
   # Google Analytics pageviews report settings
   pv:
     proxy_endpoint:   # fill in the Google Analytics superProxy endpoint of Google App Engine
@@ -79,7 +80,7 @@ theme_mode:   # [light|dark]
 # will be added to all image (site avatar & posts' images) paths starting with '/'
 #
 # e.g. 'https://cdn.com'
-img_cdn: 'https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1'
+img_cdn: 'https://raw.githubusercontent.com/cotes2020/chirpy-images/main'
 
 # the avatar on sidebar, support local or CORS resources
 avatar: '/commons/avatar.jpg'
@@ -96,6 +97,23 @@ comments:
   utterances:
     repo:         # <gh-username>/<repo>
     issue_term:   # < url | pathname | title | ...>
+  # Giscus options › https://giscus.app
+  giscus:
+    repo:             # <gh-username>/<repo>
+    repo_id:
+    category:
+    category_id:
+    mapping:          # optional, default to 'pathname'
+    input_position:   # optional, default to 'bottom'
+    lang:             # optional, default to the value of `site.lang`
+
+# Self-hosted static assets, optional › https://github.com/cotes2020/chirpy-static-assets
+assets:
+  self_host:
+    enabled:      # boolean, keep empty means false
+    # specify the Jekyll environment, empty means both
+    # only works if `assets.self_host.enabled` is 'true'
+    env:          # [development|production]
 
 paginate: 10
 
@@ -118,8 +136,7 @@ collections:
     sort_by: order
 
 defaults:
-  -
+  - scope:
-    scope:
       path: ''          # An empty string here means all files in the project
       type: posts
     values:
@@ -129,18 +146,24 @@ defaults:
       # DO NOT modify the following parameter unless you are confident enough
       # to update the code of all other post links in this project.
       permalink: /posts/:title/
-  -
+  - scope:
-    scope:
       path: _drafts
     values:
       comments: false
-  -
+  - scope:
-    scope:
       path: ''
       type: tabs             # see `site.collections`
     values:
       layout: page
       permalink: /:title/
+  - scope:
+      path: assets/img/favicons
+    values:
+      swcache: true
+  - scope:
+      path: assets/js/dist
+    values:
+      swcache: true
 
 sass:
   style: compressed
@@ -158,7 +181,6 @@ exclude:
   - '*.gem'
   - '*.gemspec'
   - tools
-  - docs
   - README.md
   - LICENSE
   - gulpfile.js

_data/assets/cross_origin.yml

@@ -0,0 +1,62 @@
+# CDNs
+
+cdns:
+  # Google Fonts
+  - url: https://fonts.googleapis.com
+  - url: https://fonts.gstatic.com
+    args: crossorigin
+  - url: https://fonts.googleapis.com
+  # jsDelivr CDN
+  - url: https://cdn.jsdelivr.net
+
+# fonts
+
+webfonts: https://fonts.googleapis.com/css2?family=Lato&family=Source+Sans+Pro:wght@400;600;700;900&display=swap
+
+# Libraries
+
+jquery:
+  js: https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js
+
+bootstrap:
+  css: https://cdn.jsdelivr.net/npm/bootstrap@4/dist/css/bootstrap.min.css
+  js: https://cdn.jsdelivr.net/npm/bootstrap@4/dist/js/bootstrap.bundle.min.js
+
+bootstrap-toc:
+  css: https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.css
+  js: https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.js
+
+fontawesome:
+  css: https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css
+
+search:
+  js: https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.10.0/dest/simple-jekyll-search.min.js
+
+mermaid:
+  js: https://cdn.jsdelivr.net/npm/mermaid@8/dist/mermaid.min.js
+
+dayjs:
+  js:
+    common: https://cdn.jsdelivr.net/npm/dayjs@1/dayjs.min.js
+    locale: https://cdn.jsdelivr.net/npm/dayjs@1/locale/:LOCALE.min.js
+    relativeTime: https://cdn.jsdelivr.net/npm/dayjs@1/plugin/relativeTime.min.js
+    localizedFormat: https://cdn.jsdelivr.net/npm/dayjs@1/plugin/localizedFormat.min.js
+
+countup:
+  js: https://cdn.jsdelivr.net/npm/countup.js@1.9.3/dist/countUp.min.js
+
+magnific-popup:
+  css: https://cdn.jsdelivr.net/npm/magnific-popup@1/dist/magnific-popup.min.css
+  js: https://cdn.jsdelivr.net/npm/magnific-popup@1/dist/jquery.magnific-popup.min.js
+
+lozad:
+  js: https://cdn.jsdelivr.net/npm/lozad/dist/lozad.min.js
+
+clipboard:
+  js:  https://cdn.jsdelivr.net/npm/clipboard@2/dist/clipboard.min.js
+
+polyfill:
+  js: https://polyfill.io/v3/polyfill.min.js?features=es6
+
+mathjax:
+  js: https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js

_data/assets/self_host.yml

@@ -0,0 +1,51 @@
+# fonts
+
+webfonts: /assets/lib/fonts/main.css
+
+# Libraries
+
+jquery:
+  js: /assets/lib/jquery-3.6.0/jquery.min.js
+
+bootstrap:
+  css: /assets/lib/bootstrap-4.6.1/bootstrap.min.css
+  js: /assets/lib/bootstrap-4.6.1/bootstrap.bundle.min.js
+
+bootstrap-toc:
+  css: /assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.css
+  js: /assets/lib/bootstrap-toc-1.0.1/bootstrap-toc.min.js
+
+fontawesome:
+  css: /assets/lib/fontawesome-free-5.15.4/css/all.min.css
+
+search:
+  js: /assets/lib/simple-jekyll-search-1.10.0/simple-jekyll-search.min.js
+
+mermaid:
+  js: /assets/lib/mermaid-8.13.10/mermaid.min.js
+
+dayjs:
+  js:
+    common: /assets/lib/dayjs-1.10.7/dayjs.min.js
+    locale: /assets/lib/dayjs-1.10.7/locale/en.min.js
+    relativeTime: /assets/lib/dayjs-1.10.7/plugin/relativeTime.min.js
+    localizedFormat: /assets/lib/dayjs-1.10.7/plugin/localizedFormat.min.js
+
+countup:
+  js: /assets/lib/countup.js-1.9.3/countUp.min.js
+
+magnific-popup:
+  css: /assets/lib/magnific-popup-1.1.0/magnific-popup.css
+  js: /assets/lib/magnific-popup-1.1.0/jquery.magnific-popup.min.js
+
+lozad:
+  js: /assets/lib/lozad-1.16.0/lozad.min.js
+
+clipboard:
+  js: /assets/lib/clipboard-2.0.9/clipboard.min.js
+
+polyfill:
+  js: /assets/lib/polyfill-v3-es6/polyfill.min.js
+
+mathjax:
+  js: /assets/lib/mathjax-3.2.0/tex-chtml.js

_data/locales/en.yml

@@ -23,18 +23,10 @@ search:
   no_results: Oops! No result founds.
 
 panel:
-  lastmod: Recent Update
+  lastmod: Recently Updated
   trending_tags: Trending Tags
   toc: Contents
 
-#  The liquid date format › http://strftime.net/
-date_format:
-  tooltip: '%a, %b %e, %Y, %l:%M %p %z'
-  post:
-    long: '%b %e, %Y'
-    short: '%b %e'
-    archive_month: '%b'
-
 copyright:
   # Shown at the bottom of the post
   license:
@@ -62,11 +54,6 @@ post:
   written_by: By
   posted: Posted
   updated: Updated
-  timeago:
-    day: days ago
-    hour: hours ago
-    minute: minutes ago
-    just_now: just now
   words: words
   pageview_measure: views
   read_time:

_data/locales/id-ID.yml

@@ -27,14 +27,6 @@ panel:
   trending_tags: Tagar Terpopuler
   toc: Konten
 
-#  The liquid date format › http://strftime.net/
-date_format:
-  tooltip: "%a, %e %b, %Y, %l:%M %p"
-  post:
-    long: "%e %b, %Y"
-    short: "%e %b"
-    archive_month: "%b"
-
 copyright:
   # Shown at the bottom of the post
   license:
@@ -62,11 +54,6 @@ post:
   written_by: Oleh
   posted: Diterbitkan
   updated: Diperbarui
-  timeago:
-    day: hari yang lalu
-    hour: jam yang lalu
-    minute: menit yang lalu
-    just_now: baru saja
   words: kata
   pageview_measure: dilihat
   read_time:

_data/locales/ko-KR.yml

@@ -27,14 +27,6 @@ panel:
   trending_tags: 인기 태그
   toc: 바로가기
 
-#  The liquid date format › http://strftime.net/
-date_format:
-  tooltip: '%F, %R %z'
-  post:
-    long: '%Y년 %m월 %d일'
-    short: '%m월 %d일'
-    archive_month: '%b월'
-
 copyright:
   # Shown at the bottom of the post
   license:
@@ -62,11 +54,6 @@ post:
   written_by: By
   posted: 게시
   updated: 업데이트
-  timeago:
-    day: 일 전
-    hour: 시간 전
-    minute: 분 전
-    just_now: 방금
   words: 단어
   pageview_measure: 조회
   read_time:

_data/locales/my-MM.yml

@@ -0,0 +1,78 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: ပို့စ်
+  category: ကဏ္ဍ
+  tag: နာမ(တက်ဂ်)
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: အဓိကစာမျက်နှာ
+  categories: ကဏ္ဍများ
+  tags: နာမ(တက်ဂ်)များ
+  archives: မှတ်တမ်း​တိုက်
+  about: အကြောင်းအရာ
+
+# the text displayed in the search bar & search results
+search:
+  hint: ရှာဖွေမည်
+  cancel: ဖျက်သိမ်းမည်
+  no_results: အိုး! ဘာမှမရှိပါ
+
+panel:
+  lastmod: မကြာသေးမီကမွမ်းမံထားသည်
+  trending_tags: ခေတ်စားနေသည့်တက်ဂ်များ
+  toc: အကြောင်းအရာများ
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: ဤပို့စ်သည်စာရေးသူ၏ :LICENSE_NAME လိုင်စင်ရထားသည်။
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: မူပိုင်ခွင့်အချို့ကို လက်ဝယ်ထားသည်။
+  verbose: >-
+    အခြားမှတ်သားထားချက်များမှလွဲ၍ ဤဆိုက်ရှိ ဘလော့ဂ်ပို့စ်များသည် စာရေးသူ၏
+    Creative Commons Attribution 4.0 International (CC BY 4.0) အောက်တွင် လိုင်စင်ရထားပါသည်။
+
+meta: Powered by :PLATFORM with :THEME theme.
+
+not_found:
+  statment: ဝမ်းနည်းပါသည်၊ ကျွန်ုပ်တို့သည် အဆိုပါ URL ကို မှားယွင်းစွာ နေရာချထားခြင်း သို့မဟုတ် ၎င်းသည် မရှိသောအရာကို ညွှန်ပြနေပါသည်။
+  hint_template: ၎င်းကို ထပ်မံရှာဖွေရန် :HEAD_BAK , သို့မဟုတ် :ARCHIVES_PAGE တွင်ရှာပါ။
+  head_back: အဓိကစာမျက်နှာသို့ပြန်သွားပါ။
+  archives_page: မှတ်တမ်း​တိုက် စာမျက်နှာ။
+
+# ----- Posts related labels -----
+
+post:
+  written_by: ကရေးသားခဲ့သည်။
+  posted: တင်ထားခဲ့သည်။
+  updated: မွမ်းမံထားခဲ့သည်။
+  words: စကားလုံးများ
+  pageview_measure: အမြင်များ
+  read_time:
+    unit: မိနစ်
+    prompt: ဖတ်ပါမည်
+  relate_posts: နောက်ထပ်ဖတ်ရန်
+  share: မျှဝေရန်
+  button:
+    next: အသစ်များ
+    previous: အဟောင်းများ
+    copy_code:
+      succeed: ကူးယူလိုက်ပြီ။
+    share_link:
+      title: လင့်ခ်ကို ကူးယူရန်
+      succeed: လင့်ခ်ကို ကူးယူလိုက်ပြီ။
+  # pinned prompt of posts list on homepage
+  pin_prompt: ချိတ်ထားသည်။
+
+# categories page
+categories:
+  category_measure: ကဏ္ဍများ
+  post_measure: ပို့စ်များ

_data/locales/ru-RU.yml

@@ -0,0 +1,78 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: Публикация
+  category: Категория
+  tag: Тег
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: Домашняя страница
+  categories: Категории
+  tags: Теги
+  archives: Архив
+  about: О сайте
+
+# the text displayed in the search bar & search results
+search:
+  hint: поиск
+  cancel: Отменить
+  no_results: Ох! Ничего не найдено.
+
+panel:
+  lastmod: Недавно обновлено
+  trending_tags: Популярные теги
+  toc: Содержание
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: Публикация защищена лицензией :LICENSE_NAME.
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: Некоторые права защищены.
+  verbose: >-
+    Публикации на сайте защищены лицензией Creative Commons Attribution 4.0 International (CC BY 4.0),
+    если в тексте публикации не указано иное.
+
+meta: Powered by :PLATFORM with :THEME theme.
+
+not_found:
+  statment: Извините, эта ссылка указывает на ресурс который не существует.
+  hint_template: :HEAD_BAK чтобы снова осуществить поиск, или поищите :ARCHIVES_PAGE.
+  head_back: Вернитесь на домашнюю страницу
+  archives_page: архиве
+
+# ----- Posts related labels -----
+
+post:
+  written_by: Автор
+  posted: Время публикации
+  updated: Обновлено
+  words: слов
+  pageview_measure: просмотров
+  read_time:
+    unit: минут
+    prompt: чтения
+  relate_posts: Вам также может быть интересно
+  share: Поделиться
+  button:
+    next: Предыдущая публикация
+    previous: Следующая публикация
+    copy_code:
+      succeed: Скопировано успешно!
+    share_link:
+      title: Скопировать ссылку
+      succeed: Ссылка успешно скопирована!
+  # pinned prompt of posts list on homepage
+  pin_prompt: Закреплено
+
+# categories page
+categories:
+  category_measure: категории
+  post_measure: публикации

_data/locales/uk-UA.yml

@@ -0,0 +1,78 @@
+# The layout text of site
+
+# ----- Commons label -----
+
+layout:
+  post: Публікація
+  category: Категорія
+  tag: Тег
+
+# The tabs of sidebar
+tabs:
+  # format: <filename_without_extension>: <value>
+  home: Домашня сторінка
+  categories: Категорії
+  tags: Теги
+  archives: Архів
+  about: Про сайт
+
+# the text displayed in the search bar & search results
+search:
+  hint: пошук
+  cancel: Скасувати
+  no_results: Ох! Нічого не знайдено.
+
+panel:
+  lastmod: Нещодавно оновлено
+  trending_tags: Популярні теги
+  toc: Зміст
+
+copyright:
+  # Shown at the bottom of the post
+  license:
+    template: Публікація захищена ліцензією :LICENSE_NAME.
+    name: CC BY 4.0
+    link: https://creativecommons.org/licenses/by/4.0/
+
+  # Displayed in the footer
+  brief: Деякі права захищено.
+  verbose: >-
+    Публікації на сайті захищено ліцензією Creative Commons Attribution 4.0 International (CC BY 4.0),
+    якщо інше не вказано в тексті.
+
+meta: Powered by :PLATFORM with :THEME theme.
+
+not_found:
+  statment: Вибачте, це посилання вказує на ресурс, що не існує.
+  hint_template: :HEAD_BAK аби здійснити пошук, або пошукайте в :ARCHIVES_PAGE.
+  head_back: Поверніться на домашню сторінку
+  archives_page: архіві
+
+# ----- Posts related labels -----
+
+post:
+  written_by: Автор
+  posted: Час публікації
+  updated: Оновлено
+  words: слів
+  pageview_measure: переглядів
+  read_time:
+    unit: хвилин
+    prompt: читання
+  relate_posts: Вас також може зацікавити
+  share: Поділитися
+  button:
+    next: Попередня публікація
+    previous: Наступна публікація
+    copy_code:
+      succeed: Успішно скопійовано!
+    share_link:
+      title: Скопіювати посилання
+      succeed: Посилання успішно скопійовано!
+  # pinned prompt of posts list on homepage
+  pin_prompt: Закріплено
+
+# categories page
+categories:
+  category_measure: категорії
+  post_measure: публікації

_data/locales/zh-CN.yml

@@ -27,14 +27,6 @@ panel:
   trending_tags: 热门标签
   toc: 文章内容
 
-#  The liquid date format › http://strftime.net/
-date_format:
-  tooltip: '%F, %R %z'
-  post:
-    long: '%F'
-    short: '%m-%d'
-    archive_month: '%m月'
-
 copyright:
   # Shown at the bottom of the post
   license:
@@ -61,11 +53,6 @@ post:
   written_by: 作者
   posted: 发表于
   updated: 更新于
-  timeago:
-    day: 天前
-    hour: 小时前
-    minute: 分钟前
-    just_now: 刚刚
   words: 字
   pageview_measure: 次浏览
   read_time:

_data/share.yml

@@ -13,7 +13,7 @@ platforms:
   -
     type: Telegram
     icon: "fab fa-telegram"
-    link: "https://telegram.me/share?text=TITLE&url=URL"
+    link: "https://t.me/share/url?url=URL&text=TITLE"
 
   # Uncomment below if you need to.
   # -

_includes/assets-origin.html

@@ -0,0 +1,12 @@
+{% comment %} Site static assets origin {% endcomment %}
+{% assign origin = 'cross_origin' %}
+
+{% if site.assets.self_host.enabled %}
+  {% if site.assets.self_host.env %}
+    {% if site.assets.self_host.env == jekyll.environment %}
+      {% assign origin = 'self_host' %}
+    {% endif %}
+  {% else %}
+    {% assign origin = 'self_host' %}
+  {% endif %}
+{% endif %}

_includes/comments/giscus.html

@@ -0,0 +1,56 @@
+<!-- https://giscus.app/ -->
+<script type="text/javascript">
+  $(function () {
+    const origin = "https://giscus.app";
+    const iframe = "iframe.giscus-frame";
+    const lightTheme = "light";
+    const darkTheme = "dark_dimmed";
+    let initTheme = lightTheme;
+
+    if ($("html[data-mode=dark]").length > 0
+        || ($("html[data-mode]").length == 0
+            && window.matchMedia("(prefers-color-scheme: dark)").matches)) {
+      initTheme = darkTheme;
+    }
+
+    let giscusAttributes = {
+      "src": "https://giscus.app/client.js",
+      "data-repo": "{{ site.comments.giscus.repo}}",
+      "data-repo-id": "{{ site.comments.giscus.repo_id }}",
+      "data-category": "{{ site.comments.giscus.category }}",
+      "data-category-id": "{{ site.comments.giscus.category_id }}",
+      "data-mapping": "{{ site.comments.giscus.mapping | default: 'pathname' }}",
+      "data-reactions-enabled": "1",
+      "data-emit-metadata": "0",
+      "data-theme": initTheme,
+      "data-input-position": "{{ site.comments.giscus.input_position | default: 'bottom' }}",
+      "data-lang": "{{ site.comments.giscus.lang | default: lang }}",
+      "crossorigin": "anonymous",
+      "async": ""
+    };
+
+    let giscusScript = document.createElement("script");
+    Object.entries(giscusAttributes).forEach(([key, value]) => giscusScript.setAttribute(key, value));
+    document.getElementById("tail-wrapper").appendChild(giscusScript);
+
+    addEventListener("message", (event) => {
+      if (event.source === window && event.data &&
+            event.data.direction === ModeToggle.ID) {
+        /* global theme mode changed */
+        const mode = event.data.message;
+        const theme = (mode === ModeToggle.DARK_MODE ? darkTheme : lightTheme);
+
+        const message = {
+          setConfig: {
+            theme: theme
+          }
+        };
+
+        const giscus = document.querySelector(iframe).contentWindow;
+        giscus.postMessage({ giscus: message }, origin);
+      }
+
+    });
+
+  });
+</script>

_includes/comments/utterances.html

@@ -14,8 +14,8 @@
     const darkTheme = "github-dark";
     let initTheme = lightTheme;
 
-    if ($("html[mode=dark]").length > 0
+    if ($("html[data-mode=dark]").length > 0
-        || ($("html[mode]").length == 0
+        || ($("html[data-mode]").length == 0
             && window.matchMedia("(prefers-color-scheme: dark)").matches)) {
       initTheme = darkTheme;
     }

_includes/css-selector.html

@@ -1,15 +0,0 @@
-<!--
-  CSS selector for site.
--->
-
-<link rel="stylesheet" href="{{ '/assets/css/style.css' | relative_url }}">
-
-{% if site.toc and page.toc %}
-  <link rel="stylesheet"
-    href="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.css">
-{% endif %}
-
-{% if page.layout == 'page' or page.layout == 'post' %}
-  <!-- Manific Popup -->
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/magnific-popup@1.1.0/dist/magnific-popup.min.css">
-{% endif %}

_includes/head.html

@@ -6,13 +6,12 @@
   <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">
 
-  {% if page.layout == 'home' or page.layout == 'post' %}
+  <!-- Allow having a localized datetime different from the appearance language -->
+  {% if site.prefer_datetime_locale %}
+    <meta name="prefer-datetime-locale" content="{{ site.prefer_datetime_locale }}">
+  {% endif %}
 
-    <!-- i18n for `_javascript/utils/timeago.js` -->
+  {% if page.layout == 'home' or page.layout == 'post' %}
-    <meta name="day-prompt" content="{{ site.data.locales[lang].post.timeago.day }}">
-    <meta name="hour-prompt" content="{{ site.data.locales[lang].post.timeago.hour }}">
-    <meta name="minute-prompt" content="{{ site.data.locales[lang].post.timeago.minute }}">
-    <meta name="justnow-prompt" content="{{ site.data.locales[lang].post.timeago.just_now }}">
 
     {% if site.google_analytics.pv.proxy_endpoint %}
       <meta name="pv-proxy-endpoint" content="{{ site.google_analytics.pv.proxy_endpoint }}">
@@ -35,12 +34,24 @@
 
   {% include favicons.html %}
 
-  <!-- Google Fonts -->
+  {% if site.resources.ignore_env != jekyll.environment and site.resources.self_hosted %}
-  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin="anonymous">
+
-  <link rel="dns-prefetch" href="https://fonts.gstatic.com">
+    <link href="{{ site.data.assets[origin].webfonts | relative_url }}" rel="stylesheet">
+
+  {% else %}
+
+    {% for cdn in site.data.assets[origin].cdns %}
+      <link rel="preconnect" href="{{ cdn.url }}" {{ cdn.args }}>
+      <link rel="dns-prefetch" href="{{ cdn.url }}" {{ cdn.args }}>
+    {% endfor %}
+
+    <link rel="stylesheet" href="{{ site.data.assets[origin].webfonts }}">
+
+  {% endif %}
 
   <!-- GA -->
-  {% if jekyll.environment == 'production' %}
+  {% if jekyll.environment == 'production'
+      and site.google_analytics.id != empty and site.google_analytics.id %}
     <link rel="preconnect" href="https://www.google-analytics.com" crossorigin="use-credentials">
     <link rel="dns-prefetch" href="https://www.google-analytics.com">
 
@@ -50,26 +61,30 @@
     {% if site.google_analytics.pv.proxy_endpoint %}
       {% assign proxy_url = site.google_analytics.pv.proxy_endpoint
           | replace: "https://", "" | split: "/" | first | prepend: "https://" %}
-
       <link rel="preconnect" href="{{ proxy_url }}" crossorigin="use-credentials">
       <link rel="dns-prefetch" href="{{ proxy_url }}">
     {% endif %}
   {% endif %}
 
-  <!-- jsDelivr CDN -->
-  <link rel="preconnect" href="https://cdn.jsdelivr.net">
-  <link rel="dns-prefetch" href="https://cdn.jsdelivr.net">
-
   <!-- Bootstrap -->
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.0.0/dist/css/bootstrap.min.css">
+  <link rel="stylesheet" href="{{ site.data.assets[origin].bootstrap.css }}">
 
   <!-- Font Awesome -->
-  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.11.2/css/all.min.css">
+  <link rel="stylesheet" href="{{ site.data.assets[origin].fontawesome.css }}">
 
-  {% include css-selector.html %}
+  <link rel="stylesheet" href="{{ '/assets/css/style.css' | relative_url }}">
+
+  {% if site.toc and page.toc %}
+    <link rel="stylesheet" href="{{ site.data.assets[origin].bootstrap-toc.css }}">
+  {% endif %}
+
+  {% if page.layout == 'page' or page.layout == 'post' %}
+    <!-- Manific Popup -->
+    <link rel="stylesheet" href="{{ site.data.assets[origin].magnific-popup.css }}">
+  {% endif %}
 
   <!-- JavaScript -->
 
-  <script src="https://cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
+  <script src="{{ site.data.assets[origin].jquery.js }}"></script>
 
 </head>

_includes/js-selector.html

@@ -7,14 +7,43 @@
 {% if page.layout == 'post' %}
   {% if site.google_analytics.pv.proxy_endpoint or site.google_analytics.pv.cache_path %}
     <!-- pv-report needs countup.js -->
-    <script async src="https://cdn.jsdelivr.net/npm/countup.js@1.9.3/dist/countUp.min.js"></script>
+    <script async src="{{ site.data.assets[origin].countup.js }}"></script>
     <script defer src="{{ '/assets/js/dist/pvreport.min.js' | relative_url }}"></script>
   {% endif %}
 {% endif %}
 
 {% if page.layout == 'post' or page.layout == 'page' %}
-  <!-- image lazy-loading & popup -->
+  <!-- image lazy-loading & popup & clipboard -->
-  <script src="https://cdn.jsdelivr.net/combine/npm/lozad/dist/lozad.min.js,npm/magnific-popup@1/dist/jquery.magnific-popup.min.js,npm/clipboard@2/dist/clipboard.min.js"></script>
+  {% assign _urls = site.data.assets[origin].magnific-popup.js
+      | append: ',' | append: site.data.assets[origin].lozad.js
+      | append: ',' | append: site.data.assets[origin].clipboard.js
+  %}
+
+  {% include jsdelivr-combine.html urls=_urls %}
+
+{% endif %}
+
+{% if page.layout == 'home'
+    or page.layout == 'post'
+    or page.layout == 'archives'
+    or page.layout == 'category'
+    or page.layout == 'tag' %}
+
+  {% if site.prefer_datetime_locale %}
+    {% assign locale = site.prefer_datetime_locale | downcase %}
+  {% else %}
+    {% assign locale = site.lang | split: '-' | first %}
+  {% endif %}
+
+  {% assign _urls = site.data.assets[origin].dayjs.js.common
+      | append: ',' | append: site.data.assets[origin].dayjs.js.locale
+      | replace: ':LOCALE', locale
+      | append: ',' | append: site.data.assets[origin].dayjs.js.relativeTime
+      | append: ',' | append: site.data.assets[origin].dayjs.js.localizedFormat
+  %}
+
+  {% include jsdelivr-combine.html urls=_urls %}
+
 {% endif %}
 
 {% if page.layout == 'home'
@@ -22,12 +51,16 @@
     or page.layout == 'post'
     or page.layout == 'page' %}
   {% assign type = page.layout %}
+{% elsif page.layout == 'archives'
+    or page.layout == 'category'
+    or page.layout == 'tag' %}
+  {% assign type = "misc" %}
 {% else %}
   {% assign type = "commons" %}
 {% endif %}
 
-{% assign js = type | prepend: '/assets/js/dist/' | append: '.min.js' %}
+{% capture script %}/assets/js/dist/{{ type }}.min.js{% endcapture %}
-<script defer src="{{ js | relative_url }}"></script>
+<script defer src="{{ script | relative_url }}"></script>
 
 {% if page.math %}
   <!-- MathJax -->
@@ -46,22 +79,21 @@
     }
   };
   </script>
-  <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+  <script src="{{ site.data.assets[origin].polyfill.js }}"></script>
-  <script type="text/javascript" id="MathJax-script" async
+  <script id="MathJax-script" async src="{{ site.data.assets[origin].mathjax.js }}">
-    src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js">
   </script>
 {% endif %}
 
 <!-- commons -->
 
-<script src="https://cdn.jsdelivr.net/combine/npm/popper.js@1.16.1,npm/bootstrap@4/dist/js/bootstrap.min.js"></script>
+<script src="{{ site.data.assets[origin].bootstrap.js }}"></script>
 
 {% if jekyll.environment == 'production' %}
   <!-- PWA -->
   <script defer src="{{ '/app.js' | relative_url }}"></script>
 
   <!-- GA -->
-  {% if site.google_analytics.id %}
+  {% if site.google_analytics.id != empty and site.google_analytics.id %}
     {% include google-analytics.html %}
   {% endif %}
 

_includes/jsdelivr-combine.html

@@ -0,0 +1,32 @@
+{% assign urls = include.urls | split: ',' %}
+
+{% assign combined_urls = nil %}
+
+{% assign domain = 'https://cdn.jsdelivr.net/' %}
+
+{% for url in urls %}
+
+  {% if url contains domain %}
+    {% assign url_snippet = url | slice: domain.size, url.size %}
+
+    {% if combined_urls %}
+      {% assign combined_urls = combined_urls | append: ',' | append: url_snippet %}
+    {% else %}
+      {% assign combined_urls = domain | append: 'combine/' | append: url_snippet %}
+    {% endif %}
+
+  {% elsif url contains '//' %}
+
+    <script src="{{ url }}"></script>
+
+  {% else %}
+
+    <script src="{{ url | relative_url }}"></script>
+
+  {% endif %}
+
+{% endfor %}
+
+{% if combined_urls %}
+  <script src="{{ combined_urls }}"></script>
+{% endif %}

_includes/mermaid.html

@@ -2,7 +2,7 @@
   mermaid-js loader
 -->
 
-<script src="https://cdn.jsdelivr.net/npm/mermaid@8/dist/mermaid.min.js"></script>
+<script src="{{ site.data.assets[origin].mermaid.js }}"></script>
 
 <script>
   $(function() {
@@ -33,8 +33,8 @@
 
     let initTheme = "default";
 
-    if ($("html[mode=dark]").length > 0
+    if ($("html[data-mode=dark]").length > 0
-      || ($("html[mode]").length == 0
+      || ($("html[data-mode]").length == 0
         && window.matchMedia("(prefers-color-scheme: dark)").matches ) ) {
       initTheme = "dark";
     }

_includes/mode-toggle.html

@@ -5,6 +5,7 @@
 <script type="text/javascript">
   class ModeToggle {
     static get MODE_KEY() { return "mode"; }
+    static get MODE_ATTR() { return "data-mode"; }
     static get DARK_MODE() { return "dark"; }
     static get LIGHT_MODE() { return "light"; }
     static get ID() { return "mode-toggle"; }
@@ -70,17 +71,17 @@
     }
 
     setDark() {
-      $('html').attr(ModeToggle.MODE_KEY, ModeToggle.DARK_MODE);
+      $('html').attr(ModeToggle.MODE_ATTR, ModeToggle.DARK_MODE);
       sessionStorage.setItem(ModeToggle.MODE_KEY, ModeToggle.DARK_MODE);
     }
 
     setLight() {
-      $('html').attr(ModeToggle.MODE_KEY, ModeToggle.LIGHT_MODE);
+      $('html').attr(ModeToggle.MODE_ATTR, ModeToggle.LIGHT_MODE);
       sessionStorage.setItem(ModeToggle.MODE_KEY, ModeToggle.LIGHT_MODE);
     }
 
     clearMode() {
-      $('html').removeAttr(ModeToggle.MODE_KEY);
+      $('html').removeAttr(ModeToggle.MODE_ATTR);
       sessionStorage.removeItem(ModeToggle.MODE_KEY);
     }
 

_includes/no-zero-date.html

@@ -1,13 +0,0 @@
-{% comment %}
-  Remove the zero padding from a month/day string
-{% endcomment %}
-
-{% assign ret = include.date_str %}
-{% assign _first_chat = ret | slice: 0 %}
-
-{% if _first_chat == '0' %}
-  {% assign _last_idx = ret.size | minus: 1 %}
-  {% assign ret = ret | slice: 1, _last_idx %}
-{% endif %}
-
-{{ ret | replace: ' 0', ' ' }}

_includes/post-sharing.html

@@ -9,7 +9,7 @@
     {% assign url = page.url | absolute_url %}
 
     {% for share in site.data.share.platforms %}
-      {% assign link = share.link | replace: 'TITLE', title | replace: 'URL', url %}
+      {% assign link = share.link | replace: 'TITLE', title | replace: 'URL', url | escape %}
         <a href="{{ link }}" data-toggle="tooltip" data-placement="top"
           title="{{ share.type }}" target="_blank" rel="noopener" aria-label="{{ share.type }}">
           <i class="fa-fw {{ share.icon }}"></i>
@@ -19,7 +19,7 @@
     <i id="copy-link" class="fa-fw fas fa-link small"
         data-toggle="tooltip" data-placement="top"
         title="{{ site.data.locales[lang].post.button.share_link.title }}"
-        title-succeed="{{ site.data.locales[lang].post.button.share_link.succeed }}">
+        data-title-succeed="{{ site.data.locales[lang].post.button.share_link.succeed }}">
     </i>
 
   </span>

_includes/refactor-content.html

@@ -56,9 +56,10 @@
     {% assign _height = nil %}
     {% assign _src = nil %}
 
-    {% assign _left = _img_snippet | split: '/>' | first %}
+    {% assign _left = _img_snippet | split: '>' | first %}
-    {% assign _right = _img_snippet | replace: _left, '' %}
+    {% assign _right = _img_snippet | remove: _left %}
 
+    {% assign _left = _left | remove: ' /' %}
     {% assign _left = _left | replace: ' w=', ' width=' | replace: ' h=', ' height=' %}
     {% assign _attrs = _left | split: ' ' %}
 
@@ -164,13 +165,13 @@
       {% endif %}
 
       {% capture _label %}
-        <span label-text="{{ _label_text | strip }}"><i class="{{ _label_icon }}"></i></span>
+        <span data-label-text="{{ _label_text | strip }}"><i class="{{ _label_icon }}"></i></span>
       {% endcapture %}
 
       {% assign _new_content = _new_content | append: _snippet
           | append: '<div class="code-header">'
           | append: _label
-          | append: '<button aria-label="copy" title-succeed="'
+          | append: '<button aria-label="copy" data-title-succeed="'
           | append: site.data.locales[lang].post.button.copy_code.succeed
           | append: '"><i class="far fa-clipboard"></i></button></div>'
           | append: '<div class="highlight"><code>'
@@ -204,10 +205,11 @@
       {% endif %}
 
       {% assign id = snippet | split: '"' | first %}
-      {% capture anchor %}<a href="#{{ id }}" class="anchor"><i class="fas fa-hashtag"></i></a>{% endcapture %}
+      {% capture anchor %}<a href="#{{ id }}" class="anchor text-muted"><i class="fas fa-hashtag"></i></a>{% endcapture %}
 
       {% assign left = snippet | split: mark_end | first %}
-      {% assign right = snippet | replace: left, '' %}
+      {% assign right = snippet | slice: left.size, snippet.size %}
+      {% assign left = left | replace: '">', '"><span class="mr-2">' | append: '</span>' %}
 
       {% assign _new_content = _new_content | append: mark_start
           | append: left | append: anchor | append: mark_end | append: right
@@ -222,6 +224,54 @@
 
 {% assign _content = _heading_content %}
 
+<!-- Wrap prompt element of blockquote with the <div> tag -->
+
+{% assign blockquote_start = '<blockquote class=' %}
+{% assign blockquote_end = '</blockquote>' %}
+{% assign cls_prefix = 'prompt-' %}
+
+{% if _content contains blockquote_start %}
+
+  {% assign _prompt_content = nil %}
+  {% assign _prompt_snippets = _content | split: blockquote_start %}
+
+  {% for _snippet in _prompt_snippets %}
+
+    {% if forloop.first %}
+      {% assign _prompt_content =  _snippet %}
+      {% continue %}
+    {% endif %}
+
+    {% assign left = _snippet | split: blockquote_end | first %}
+    {% assign right = _snippet | slice: left.size, _snippet.size %}
+
+    {% assign cls_str = left | split: '>' | first %}
+    {% assign cls_array = cls_str | remove: '"' | split: ' ' %}
+    {% assign is_prompt = false %}
+
+    {% for cls in cls_array %}
+      {% if cls contains cls_prefix %}
+        {% assign is_prompt = true %}
+        {% break %}
+      {% endif %}
+    {% endfor %}
+
+    {% unless is_prompt %}
+      {% assign _prompt_content = _prompt_content | append: blockquote_start | append: _snippet %}
+      {% continue %}
+    {% endunless %}
+
+    {% assign left = left | slice: cls_str.size, left.size %}
+    {% assign left = cls_str | append: '><div' | append: left | append: '</div>' %}
+
+    {% assign _prompt_content = _prompt_content | append: blockquote_start | append: left | append: right %}
+
+  {% endfor %}
+
+  {% assign _content = _prompt_content %}
+
+{% endif %}
+
 <!-- return -->
 
 {{ _content }}

_includes/search-loader.html

@@ -16,7 +16,7 @@
 
 {% capture not_found %}<p class="mt-5">{{ site.data.locales[lang].search.no_results }}</p>{% endcapture %}
 
-<script src="https://cdn.jsdelivr.net/npm/simple-jekyll-search@1.10.0/dest/simple-jekyll-search.min.js"></script>
+<script src="{{ site.data.assets[origin].search.js }}"></script>
 
 <script>
 SimpleJekyllSearch({

_includes/sidebar.html

@@ -2,19 +2,19 @@
   The Side Bar
 -->
 
-<div id="sidebar" class="d-flex flex-column align-items-end" lang="{{lang}}">
+<div id="sidebar" class="d-flex flex-column align-items-end">
   <div class="profile-wrapper text-center">
     <div id="avatar">
       <a href="{{ '/' | relative_url }}" alt="avatar" class="mx-auto">
-        {% if site.avatar != '' and site.avatar %}
+        {% if site.avatar != empty and site.avatar %}
           {% capture avatar_url %}
-            {%- if site.avatar contains '://' -%}
+            {% if site.avatar contains '://' %}
               {{ site.avatar }}
-            {%- elsif site.img_cdn != '' and site.img_cdn -%}
+            {% elsif site.img_cdn != empty and site.img_cdn %}
               {{ site.avatar | prepend: site.img_cdn }}
-            {%- else -%}
+            {% else %}
               {{ site.avatar | relative_url }}
-            {%- endif -%}
+            {% endif %}
           {% endcapture %}
           <img src="{{ avatar_url }}" alt="avatar" onerror="this.style.display='none'">
         {% endif %}

_includes/timeago.html

@@ -3,24 +3,13 @@
   See: ${JS_ROOT}/utils/timeago.js
 -->
 
-{% assign tooltip_df = site.data.locales[lang].date_format.tooltip %}
-{% assign post_long_df = site.data.locales[lang].date_format.post.long %}
-{% assign post_short_df = site.data.locales[lang].date_format.post.short %}
-
 <em class="timeago{% if include.class %} {{ include.class }}{% endif %}"
-    date="{{ include.date }}"
+    data-ts="{{ include.date | date: '%s' }}"
     {% if include.tooltip %}
-      data-toggle="tooltip"
+      data-toggle="tooltip" data-placement="bottom" data-tooltip-df="llll"
-      data-placement="bottom"
+    {% endif %}
-      title="{{ include.date | date: tooltip_df }}"
+    {% if include.capitalize %}
+      data-capitalize="true"
     {% endif %}>
-
+  {{ include.date | date: '%Y-%m-%d' }}
-  {%- assign this_year = site.time | date: "%Y" -%}
-  {%- assign post_year = include.date | date: "%Y" -%}
-
-  {%- if post_year == this_year -%}
-    {{ include.date | date: post_short_df }}
-  {%- else -%}
-    {{ include.date | date: post_long_df }}
-  {%- endif -%}
 </em>

_includes/toc.html

@@ -7,7 +7,7 @@
 
 {% if enable_toc %}
 <!-- BS-toc.js will be loaded at medium priority -->
-<script src="https://cdn.jsdelivr.net/gh/afeld/bootstrap-toc@1.0.1/dist/bootstrap-toc.min.js"></script>
+<script src="{{ site.data.assets[origin].bootstrap-toc.js }}"></script>
 
 <div id="toc-wrapper" class="pl-0 pr-4 mb-5">
   <div class="panel-heading pl-3 pt-2 mb-2">{{- site.data.locales[lang].panel.toc -}}</div>

_includes/topbar.html

@@ -2,7 +2,7 @@
   The Top Bar
 -->
 
-<div id="topbar-wrapper" class="row justify-content-center topbar-down">
+<div id="topbar-wrapper" class="row justify-content-center">
   <div id="topbar" class="col-11 d-flex h-100 align-items-center justify-content-between">
     <span id="breadcrumb">
 
@@ -50,7 +50,7 @@
     <div id="topbar-title">
       {% if page.layout == 'home' %}
         {{- site.data.locales[lang].title | default: site.title -}}
-      {% elsif page.collection == 'tabs' or page.dynamic_title %}
+      {% elsif page.collection == 'tabs' or page.layout == 'page' %}
         {%- capture tab_key -%}{{ page.url | split: '/' }}{%- endcapture -%}
         {{- site.data.locales[lang].tabs[tab_key] | default: page.title -}}
       {% else %}
@@ -63,7 +63,6 @@
       <i class="fas fa-search fa-fw"></i>
       <input class="form-control" id="search-input" type="search"
         aria-label="search" autocomplete="off" placeholder="{{ site.data.locales[lang].search.hint | capitalize }}...">
-      <i class="fa fa-times-circle fa-fw" id="search-cleaner"></i>
     </span>
     <span id="search-cancel" >{{ site.data.locales[lang].search.cancel }}</span>
   </div>

_javascript/commons/locale-helper.js

@@ -0,0 +1,19 @@
+/**
+ * A tool for locale datetime
+ */
+
+const LocaleHelper = (function () {
+  const $preferLocale = $('meta[name="prefer-datetime-locale"]');
+  const locale = $preferLocale.length > 0 ?
+      $preferLocale.attr('content').toLowerCase() : $('html').attr('lang').substr(0, 2);
+  const attrTimestamp = 'data-ts';
+  const attrDateFormat = 'data-df';
+
+  return {
+    locale: () => locale,
+    attrTimestamp: () => attrTimestamp,
+    attrDateFormat: () => attrDateFormat,
+    getTimestamp: ($elem) => Number($elem.attr(attrTimestamp)),  // unix timestamp
+    getDateFormat: ($elem) => $elem.attr(attrDateFormat)
+  };
+}());

_javascript/commons/scroll-helper.js

@@ -0,0 +1,36 @@
+/**
+ * A tool for smooth scrolling and topbar switcher
+ */
+const ScrollHelper = (function () {
+  const $body = $("body");
+  const ATTR_TOPBAR_VISIBLE = "data-topbar-visible";
+  const topbarHeight = $("#topbar-wrapper").outerHeight();
+
+  let scrollUpCount = 0; // the number of times the scroll up was triggered by ToC or anchor
+  let topbarLocked = false;
+  let orientationLocked = false;
+
+  return {
+    hideTopbar: () => $body.attr(ATTR_TOPBAR_VISIBLE, false),
+    showTopbar: () => $body.attr(ATTR_TOPBAR_VISIBLE, true),
+
+    // scroll up
+
+    addScrollUpTask: () => {
+      scrollUpCount += 1;
+      if (!topbarLocked) { topbarLocked = true; }
+    },
+    popScrollUpTask: () => scrollUpCount -= 1,
+    hasScrollUpTask: () => scrollUpCount > 0,
+    topbarLocked: () => topbarLocked === true,
+    unlockTopbar: () => topbarLocked = false,
+    getTopbarHeight: () => topbarHeight,
+
+    // orientation change
+
+    orientationLocked: () => orientationLocked === true,
+    lockOrientation: () => orientationLocked = true,
+    unLockOrientation: () => orientationLocked = false
+  };
+
+}());

_javascript/commons/search-display.js

@@ -3,12 +3,9 @@
 */
 
 $(function() {
-
   const btnSbTrigger = $("#sidebar-trigger");
   const btnSearchTrigger = $("#search-trigger");
   const btnCancel = $("#search-cancel");
-  const btnClear = $("#search-cleaner");
-
   const main = $("#main");
   const topbarTitle = $("#topbar-title");
   const searchWrapper = $("#search-wrapper");
@@ -33,8 +30,7 @@ $(function() {
     };
   }());
 
-
+  /*--- Actions in mobile screens (Sidebar hidden) ---*/
-  /*--- Actions in small screens (Sidebar unloaded) ---*/
 
   const mobileSearchBar = (function () {
     return {
@@ -75,7 +71,6 @@ $(function() {
             hints.removeClass("unloaded");
           }
           resultWrapper.addClass("unloaded");
-          btnClear.removeClass("visible");
           main.removeClass("unloaded");
 
           // now the release method must be called after $(#main) display
@@ -92,7 +87,6 @@ $(function() {
 
   }());
 
-
   function isMobileView() {
     return btnCancel.hasClass("loaded");
   }
@@ -116,38 +110,20 @@ $(function() {
     searchWrapper.removeClass("input-focus");
   });
 
-  input.on("keyup", function(e) {
+  input.on("input", () => {
-    if (e.keyCode === 8 && input.val() === "") {
+    if (input.val() === "") {
-      if (!isMobileView()) {
+      if (isMobileView()) {
-        resultSwitch.off();
-      } else {
         hints.removeClass("unloaded");
-      }
       } else {
-      if (input.val() !== "") {
+        resultSwitch.off();
-        resultSwitch.on();
-
-        if (!btnClear.hasClass("visible")) {
-          btnClear.addClass("visible");
       }
 
+    } else {
+      resultSwitch.on();
       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("visible");
   });
 
 });

_javascript/commons/topbar-switch.js

@@ -1,69 +0,0 @@
-/*
- * Hide Header on scroll down
- */
-
-$(function() {
-  const $topbarWrapper = $("#topbar-wrapper");
-  const $panel = $("#panel-wrapper");
-  const $searchInput = $("#search-input");
-
-  const CLASS_TOPBAR_UP = "topbar-up";
-  const CLASS_TOPBAR_DOWN = "topbar-down";
-  const ATTR_TOC_SCROLLING_UP = "toc-scrolling-up"; // topbar locked
-
-  let didScroll;
-  let lastScrollTop = 0;
-
-  const delta = $topbarWrapper.outerHeight();
-  const topbarHeight = $topbarWrapper.outerHeight();
-
-  function hasScrolled() {
-    let st = $(this).scrollTop();
-
-    /* Make sure they scroll more than delta */
-    if (Math.abs(lastScrollTop - st) <= delta) {
-      return;
-    }
-
-    if (st > lastScrollTop ) { // Scroll Down
-      if (st > topbarHeight) {
-        $topbarWrapper.removeClass(CLASS_TOPBAR_DOWN).addClass(CLASS_TOPBAR_UP);
-        $panel.removeClass(CLASS_TOPBAR_DOWN);
-
-        if ($searchInput.is(":focus")) {
-          $searchInput.blur(); /* remove focus */
-        }
-      }
-    } else  {// Scroll up
-      // did not reach the bottom of the document, i.e., still have space to scroll up
-      if (st + $(window).height() < $(document).height()) {
-        let tocScrollingUp = $topbarWrapper.attr(ATTR_TOC_SCROLLING_UP);
-        if (typeof tocScrollingUp !== "undefined") {
-          if (tocScrollingUp === "false") {
-            $topbarWrapper.removeAttr(ATTR_TOC_SCROLLING_UP);
-          }
-
-        } else {
-          $topbarWrapper.removeClass(CLASS_TOPBAR_UP).addClass(CLASS_TOPBAR_DOWN);
-          $panel.addClass(CLASS_TOPBAR_DOWN);
-        }
-      }
-    }
-
-    lastScrollTop = st;
-  }
-
-  $(window).scroll(function(event) {
-    if ($("#topbar-title").is(":hidden")) {
-      didScroll = true;
-    }
-  });
-
-  setInterval(function() {
-    if (didScroll) {
-      hasScrolled();
-      didScroll = false;
-    }
-  }, 250);
-
-});

_javascript/commons/topbar-switcher.js

@@ -0,0 +1,90 @@
+/*
+ * Hide Header on scroll down
+ */
+
+$(function() {
+  const $searchInput = $("#search-input");
+  const delta = ScrollHelper.getTopbarHeight();
+
+  let didScroll;
+  let lastScrollTop = 0;
+
+  function hasScrolled() {
+    let st = $(this).scrollTop();
+
+    /* Make sure they scroll more than delta */
+    if (Math.abs(lastScrollTop - st) <= delta) {
+      return;
+    }
+
+    if (st > lastScrollTop ) { // Scroll Down
+      ScrollHelper.hideTopbar();
+
+      if ($searchInput.is(":focus")) {
+        $searchInput.blur(); /* remove focus */
+      }
+
+    } else  { // Scroll up
+      // has not yet scrolled to the bottom of the screen, that is, there is still space for scrolling
+      if (st + $(window).height() < $(document).height()) {
+
+        if (ScrollHelper.hasScrollUpTask()) {
+          return;
+        }
+
+        if (ScrollHelper.topbarLocked()) { // avoid redundant scroll up event from smooth scrolling
+          ScrollHelper.unlockTopbar();
+        } else {
+          if (ScrollHelper.orientationLocked()) { // avoid device auto scroll up on orientation change
+            ScrollHelper.unLockOrientation();
+          } else {
+            ScrollHelper.showTopbar();
+          }
+        }
+      }
+    }
+
+    lastScrollTop = st;
+
+  } // hasScrolled()
+
+  function handleLandscape() {
+    if ($(window).scrollTop() === 0) {
+      return;
+    }
+    ScrollHelper.lockOrientation();
+    ScrollHelper.hideTopbar();
+  }
+
+  if (screen.orientation) {
+    screen.orientation.onchange = () => {
+      const type = screen.orientation.type;
+      if (type ===  "landscape-primary" || type === "landscape-secondary") {
+        handleLandscape();
+      }
+    };
+
+  } else {
+    // for the browsers that not support `window.screen.orientation` API
+    $(window).on("orientationchange",() => {
+      if ($(window).width() < $(window).height()) { // before rotating, it is still in portrait mode.
+        handleLandscape();
+      }
+    });
+  }
+
+  $(window).scroll(() => {
+    if (didScroll) {
+      return;
+    }
+    didScroll = true;
+  });
+
+  setInterval(() => {
+    if (didScroll) {
+      hasScrolled();
+      didScroll = false;
+    }
+  }, 250);
+
+});

_javascript/commons/topbar-title.js

@@ -1,46 +1,66 @@
 /*
- * Top bar title auto change while scrolling in mobile screens.
+ * Top bar title auto change while scrolling up/down in mobile screens.
 */
 
 $(function() {
+  const titleSelector = "div.post>h1:first-of-type";
+  const $pageTitle = $(titleSelector);
+  const $topbarTitle = $("#topbar-title");
 
-  const topbarTitle = $("#topbar-title");
+  if ($pageTitle.length === 0 /* on Home page */
-  const postTitle = $("div.post>h1");
+      || $pageTitle.hasClass("dynamic-title")
+      || $topbarTitle.is(":hidden")) {/* not in mobile views */
+    return;
+  }
 
-  const DEFAULT = topbarTitle.text().trim();
+  const defaultTitleText = $topbarTitle.text().trim();
-
+  let pageTitleText = $pageTitle.text().trim();
-  let title = (postTitle.length > 0) ?
+  let hasScrolled = false;
-    postTitle.text().trim() : $("h1").text().trim();
+  let lastScrollTop = 0;
 
   if ($("#page-category").length || $("#page-tag").length) {
     /* The title in Category or Tag page will be "<title> <count_of_posts>" */
-    if (/\s/.test(title)) {
+    if (/\s/.test(pageTitleText)) {
-      title = title.replace(/[0-9]/g, "").trim();
+      pageTitleText = pageTitleText.replace(/[0-9]/g, "").trim();
     }
   }
 
-  /* Replace topbar title while scroll screens. */
+  // When the page is scrolled down and then refreshed, the topbar title needs to be initialized
-  $(window).scroll(function () {
+  if ($pageTitle.offset().top < $(window).scrollTop()) {
-    if ($("#post-list").length /* in Home page */
+    $topbarTitle.text(pageTitleText);
-      || postTitle.is(":hidden") /* is tab pages */
-      || topbarTitle.is(":hidden") /* not mobile screens */
-      || $("#sidebar.sidebar-expand").length) { /* when the sidebar trigger is clicked */
-      return false;
   }
 
-    if ($(this).scrollTop() >= 95) {
+  let options = {
-      if (topbarTitle.text() !== title) {
+    rootMargin: '-48px 0px 0px 0px', // 48px equals to the topbar height (3rem)
-        topbarTitle.text(title);
+    threshold: [0, 1]
+  };
+
+  let observer = new IntersectionObserver((entries) => {
+    if (!hasScrolled) {
+      hasScrolled = true;
+      return;
+    }
+
+    let curScrollTop = $(window).scrollTop();
+    let isScrollDown = lastScrollTop < curScrollTop;
+    lastScrollTop = curScrollTop;
+    let heading = entries[0];
+
+    if (isScrollDown) {
+      if (heading.intersectionRatio === 0) {
+        $topbarTitle.text(pageTitleText);
       }
     } else {
-      if (topbarTitle.text() !== DEFAULT) {
+      if (heading.intersectionRatio === 1) {
-        topbarTitle.text(DEFAULT);
+        $topbarTitle.text(defaultTitleText);
       }
     }
-  });
+  }, options);
 
-  /* Click title remove hover effect. */
+  observer.observe(document.querySelector(titleSelector));
-  topbarTitle.click(function() {
+
+  /* Click title will scroll to top */
+  $topbarTitle.click(function() {
     $("body,html").animate({scrollTop: 0}, 800);
   });
 

_javascript/copyright

@@ -1,5 +1,5 @@
 /*!
- * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */

_javascript/utils/clipboard.js

@@ -10,6 +10,8 @@ $(function() {
   const btnSelector = '.code-header>button';
   const ICON_SUCCESS = 'fas fa-check';
   const ATTR_TIMEOUT = 'timeout';
+  const ATTR_TITLE_SUCCEED = 'data-title-succeed';
+  const ATTR_TITLE_ORIGIN = 'data-original-title';
   const TIMEOUT = 2000; // in milliseconds
 
   function isLocked(node) {
@@ -53,12 +55,12 @@ $(function() {
   const ICON_DEFAULT = getIcon(btnSelector);
 
   function showTooltip(btn) {
-    const succeedTitle = $(btn).attr('title-succeed');
+    const succeedTitle = $(btn).attr(ATTR_TITLE_SUCCEED);
-    $(btn).attr('data-original-title', succeedTitle).tooltip('show');
+    $(btn).attr(ATTR_TITLE_ORIGIN, succeedTitle).tooltip('show');
   }
 
   function hideTooltip(btn) {
-    $(btn).tooltip('hide').removeAttr('data-original-title');
+    $(btn).tooltip('hide').removeAttr(ATTR_TITLE_ORIGIN);
   }
 
   function setSuccessIcon(btn) {
@@ -115,14 +117,14 @@ $(function() {
 
     // Switch tooltip title
 
-    const defaultTitle = target.attr('data-original-title');
+    const defaultTitle = target.attr(ATTR_TITLE_ORIGIN);
-    const succeedTitle = target.attr('title-succeed');
+    const succeedTitle = target.attr(ATTR_TITLE_SUCCEED);
 
-    target.attr('data-original-title', succeedTitle).tooltip('show');
+    target.attr(ATTR_TITLE_ORIGIN, succeedTitle).tooltip('show');
     lock(target);
 
     setTimeout(() => {
-      target.attr('data-original-title', defaultTitle);
+      target.attr(ATTR_TITLE_ORIGIN, defaultTitle);
       unlock(target);
     }, TIMEOUT);
 

_javascript/utils/locale-datetime.js

@@ -0,0 +1,20 @@
+/**
+ * Update month/day to locale datetime
+ *
+ * Requirement: <https://github.com/iamkun/dayjs>
+ */
+
+$(function() {
+  dayjs.locale(LocaleHelper.locale());
+  dayjs.extend(window.dayjs_plugin_localizedFormat);
+
+  $(`[${LocaleHelper.attrTimestamp()}]`).each(function () {
+    const date = dayjs.unix(LocaleHelper.getTimestamp($(this)));
+    const df = LocaleHelper.getDateFormat($(this));
+    const text = date.format(df);
+
+    $(this).text(text);
+    $(this).removeAttr(LocaleHelper.attrTimestamp());
+    $(this).removeAttr(LocaleHelper.attrDateFormat());
+  });
+});

_javascript/utils/smooth-scroll.js

@@ -8,53 +8,56 @@
 */
 
 $(function() {
-  const $topbarWrapper = $("#topbar-wrapper");
-  const topbarHeight = $topbarWrapper.outerHeight();
   const $topbarTitle = $("#topbar-title");
-
-  const ATTR_TOC_SCROLLING = "toc-scrolling-up";
-  const SCROLL_MARK = "scroll-focus";
   const REM = 16; // in pixels
-  let tocScrollUpCount = 0;
+  const ATTR_SCROLL_FOCUS = "scroll-focus";
 
   $("a[href*='#']")
     .not("[href='#']")
     .not("[href='#0']")
     .click(function(event) {
-      if (this.pathname.replace(/^\//, "") === location.pathname.replace(/^\//, "")) {
+      if (this.pathname.replace(/^\//, "") !==
-        if (location.hostname === this.hostname) {
+            location.pathname.replace(/^\//, "")) {
+        return;
+      }
+
+      if (location.hostname !== this.hostname) {
+        return;
+      }
+
       const hash = decodeURI(this.hash);
       let toFootnoteRef = RegExp(/^#fnref:/).test(hash);
-          let toFootnote = toFootnoteRef? false : RegExp(/^#fn:/).test(hash);
+      let toFootnote = toFootnoteRef ? false : RegExp(/^#fn:/).test(hash);
       let selector = hash.includes(":") ? hash.replace(/\:/g, "\\:") : hash;
       let $target = $(selector);
 
-          let parent = $(this).parent().prop("tagName");
+      let isMobileViews = $topbarTitle.is(":visible");
-          let isAnchor = RegExp(/^H\d/).test(parent);
+      let isPortrait = $(window).width() < $(window).height();
-          let isMobileViews = !$topbarTitle.is(":hidden");
+
+      if (typeof $target === "undefined") {
+        return;
+      }
 
-          if (typeof $target !== "undefined") {
       event.preventDefault();
 
       if (history.pushState) { /* add hash to URL */
         history.pushState(null, null, hash);
       }
 
-            let curOffset = isAnchor? $(this).offset().top : $(window).scrollTop();
+      let curOffset = $(window).scrollTop();
       let destOffset = $target.offset().top -= REM / 2;
 
       if (destOffset < curOffset) { // scroll up
-              if (!isAnchor && !toFootnote) { // trigger by ToC item
+        ScrollHelper.hideTopbar();
-                if (!isMobileViews) { // on desktop/tablet screens
+        ScrollHelper.addScrollUpTask();
-                  $topbarWrapper.removeClass("topbar-down").addClass("topbar-up");
+
-                  // Send message to `${JS_ROOT}/commons/topbar-switch.js`
+        if (isMobileViews && isPortrait) {
-                  $topbarWrapper.attr(ATTR_TOC_SCROLLING, true);
+          destOffset -= ScrollHelper.getTopbarHeight();
-                  tocScrollUpCount += 1;
-                }
         }
 
-              if ((isAnchor || toFootnoteRef) && isMobileViews) {
+      } else { // scroll down
-                destOffset -= topbarHeight;
+        if (isMobileViews && isPortrait) {
+          destOffset -= ScrollHelper.getTopbarHeight();
         }
       }
 
@@ -64,18 +67,18 @@ $(function() {
         $target.focus();
 
         /* clean up old scroll mark */
-              if ($(`[${SCROLL_MARK}=true]`).length) {
+        if ($(`[${ATTR_SCROLL_FOCUS}=true]`).length) {
-                $(`[${SCROLL_MARK}=true]`).attr(SCROLL_MARK, false);
+          $(`[${ATTR_SCROLL_FOCUS}=true]`).attr(ATTR_SCROLL_FOCUS, false);
         }
 
         /* Clean :target links */
         if ($(":target").length) { /* element that visited by the URL with hash */
-                $(":target").attr(SCROLL_MARK, false);
+          $(":target").attr(ATTR_SCROLL_FOCUS, false);
         }
 
         /* set scroll mark to footnotes */
         if (toFootnote || toFootnoteRef) {
-                $target.attr(SCROLL_MARK, true);
+          $target.attr(ATTR_SCROLL_FOCUS, true);
         }
 
         if ($target.is(":focus")) { /* Checking if the target was focused */
@@ -85,17 +88,9 @@ $(function() {
           $target.focus(); /* Set focus again */
         }
 
-              if (typeof $topbarWrapper.attr(ATTR_TOC_SCROLLING) !== "undefined") {
+        if (ScrollHelper.hasScrollUpTask()) {
-                tocScrollUpCount -= 1;
+          ScrollHelper.popScrollUpTask();
-
-                if (tocScrollUpCount <= 0) {
-                  $topbarWrapper.attr(ATTR_TOC_SCROLLING, "false");
-                }
         }
       });
-          }
-        }
-      }
-
     }); /* click() */
 });

_javascript/utils/timeago.js

@@ -1,77 +1,87 @@
-/*
+/**
  * Calculate the Timeago
+ *
+ * Requirement: <https://github.com/iamkun/dayjs>
  */
 
 $(function() {
-  const timeagoElem = $(".timeago");
+  const attrTimestamp = LocaleHelper.attrTimestamp();
-  let tasks = timeagoElem.length;
+  const attrCapitalize = 'data-capitalize';
+  const $timeago = $(".timeago");
+
+  let timeagoTasks = $timeago.length;
   let intervalId = void 0;
 
-  const dPrompt = $("meta[name=day-prompt]").attr("content");
+  dayjs.locale(LocaleHelper.locale());
-  const hrPrompt = $("meta[name=hour-prompt]").attr("content");
+  dayjs.extend(window.dayjs_plugin_relativeTime);
-  const minPrompt = $("meta[name=minute-prompt]").attr("content");
+  dayjs.extend(window.dayjs_plugin_localizedFormat);
-  const justnowPrompt = $("meta[name=justnow-prompt]").attr("content");
 
-  function timeago(date, initDate) {
+  function relativetime($elem) {
-    let now = new Date();
+    const now = dayjs();
-    let past = new Date(date);
+    const past = dayjs.unix(LocaleHelper.getTimestamp($elem));
 
-    if (past.getFullYear() !== now.getFullYear()
+    let diffMonth = now.diff(past, 'month', true);
-        || past.getMonth() !== now.getMonth()) {
+    if (diffMonth > 10) { // year ago range: 11 months to 17months
-      return initDate;
+      $elem.removeAttr(attrTimestamp);
+      return past.format('ll'); // see: https://day.js.org/docs/en/display/format#list-of-localized-formats
     }
 
-    let seconds = Math.floor((now - past) / 1000);
+    let diffMinute = now.diff(past, 'minute', true);
-
+    if (diffMinute > 44) { // an hour ago range: 45 to 89 minutes
-    let day = Math.floor(seconds / 86400);
+      $elem.removeAttr(attrTimestamp);
-    if (day >= 1) {
-      return ` ${day} ${dPrompt}`;
     }
 
-    let hour = Math.floor(seconds / 3600);
+    return past.fromNow();
-    if (hour >= 1) {
-      return ` ${hour} ${hrPrompt}`;
-    }
-
-    let minute = Math.floor(seconds / 60);
-    if (minute >= 1) {
-      return ` ${minute} ${minPrompt}`;
-    }
-
-    return justnowPrompt;
   }
 
   function updateTimeago() {
-    $(".timeago").each(function() {
+    $timeago.each(function() {
-      if ($(this)[0].hasAttribute("date") === false) {
+      if (typeof $(this).attr(attrTimestamp) === 'undefined') {
-        tasks -= 1;
+        timeagoTasks -= 1;
         return;
       }
 
-      let date = $(this).attr("date");
+      let relativeTime = relativetime($(this));
-      let initDate = $(this).text();
+      const capitalize = $(this).attr(attrCapitalize);
-      let relativeDate = timeago(date, initDate);
+      if (typeof capitalize !== 'undefined' && capitalize === 'true') {
-
+        relativeTime = relativeTime.replace(/^\w/, (c) => c.toUpperCase());
-      if (relativeDate === initDate) {
-        $(this).removeAttr("date");
-      } else {
-        $(this).text(relativeDate);
       }
 
+      if ($(this).text() !== relativeTime) {
+        $(this).text(relativeTime);
+      }
     });
 
-    if (tasks === 0 && typeof intervalId !== "undefined") {
+    if (timeagoTasks === 0 && typeof intervalId !== "undefined") {
       clearInterval(intervalId); /* stop interval */
     }
-    return tasks;
+
+    return timeagoTasks;
   }
 
-  if (tasks === 0) {
+  function setupTooltips() {
+    $timeago.each(function() {
+      const tooltip = $(this).attr('data-toggle');
+      if (typeof tooltip === 'undefined' || tooltip !== 'tooltip') {
         return;
       }
 
-  if (updateTimeago() > 0) { /* run immediately */
+      const df = $(this).attr('data-tooltip-df');
-    intervalId = setInterval(updateTimeago, 60000); /* run every minute */
+      const ts = LocaleHelper.getTimestamp($(this));
+      const dateStr = dayjs.unix(ts).format(df);
+      $(this).attr('data-original-title', dateStr);
+      $(this).removeAttr('data-tooltip-df');
+    });
+  }
+
+  if (timeagoTasks === 0) {
+    return;
+  }
+
+  setupTooltips();
+
+  if (updateTimeago()) { /* run immediately */
+    intervalId = setInterval(updateTimeago, 60 * 1000); /* run every minute */
   }
 
 });

_layouts/archives.html

@@ -3,8 +3,6 @@ layout: page
 # The Archives of posts.
 ---
 
-{% include lang.html %}
-
 <div id="archives" class="pl-xl-2">
 
 {% for post in site.posts %}
@@ -18,11 +16,11 @@ layout: page
   {% endif %}
     <li>
       <div>
-        {% capture this_day %}{{ post.date | date: "%d" }}{% endcapture %}
+        {% assign ts = post.date | date: '%s' %}
-        {% capture _mth_df %}{{ site.data.locales[lang].date_format.post.archive_month }}{% endcapture %}
+        <span class="date day" data-ts="{{ ts }}" data-df="DD">{{ post.date | date: "%d" }}</span>
-        {% capture this_month %}{{ post.date | date: _mth_df }}{% endcapture %}
+        <span class="date month small text-muted" data-ts="{{ ts }}" data-df="MMM">
-        <span class="date day">{{ this_day }}</span>
+          {{ post.date | date: '%m' }}
-        <span class="date month small text-muted">{% include no-zero-date.html date_str=this_month %}</span>
+        </span>
         <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       </div>
     </li>

_layouts/category.html

@@ -3,8 +3,6 @@ layout: page
 # The Category layout
 ---
 
-{% include lang.html %}
-
 <div id="page-category">
   <h1 class="pl-lg-2">
     <i class="far fa-folder-open fa-fw text-muted"></i>
@@ -13,13 +11,13 @@ layout: page
   </h1>
 
   <ul class="post-content pl-0">
-    {% assign post_df = site.data.locales[lang].date_format.post.long %}
-
     {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
       <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: post_df }}</span>
+      <span class="text-muted small" data-ts="{{ post.date | date: '%s' }}" data-df="ll">
+        {{ post.date | date: '%Y-%m-%d' }}
+      </span>
     </li>
     {% endfor %}
   </ul>

_layouts/default.html

@@ -7,9 +7,11 @@ layout: compress
 
 {% include lang.html %}
 
+{% include assets-origin.html %}
+
 {% capture prefer_mode %}
   {% if site.theme_mode %}
-    mode="{{ site.theme_mode }}"
+    data-mode="{{ site.theme_mode }}"
   {% endif %}
 {% endcapture %}
 
@@ -21,7 +23,7 @@ layout: compress
     {% include mode-toggle.html %}
   {% endunless %}
 
-  <body data-spy="scroll" data-target="#toc">
+  <body data-spy="scroll" data-target="#toc" data-topbar-visible="true">
 
     {% include sidebar.html %}
 

_layouts/home.html

@@ -6,7 +6,7 @@ layout: page
 {% include lang.html %}
 
 {% assign pinned = site.posts | where: "pin", "true" %}
-{% assign default = site.posts | where_exp: "item", "item.pin != true" %}
+{% assign default = site.posts | where_exp: "item", "item.pin != true and item.hidden != true" %}
 
 {% assign posts = "" | split: "" %}
 
@@ -62,7 +62,7 @@ layout: page
       <div class="mr-auto">
         <!-- posted date -->
         <i class="far fa-calendar fa-fw"></i>
-        {% include timeago.html date=post.date tooltip=true %}
+        {% include timeago.html date=post.date tooltip=true capitalize=true %}
 
         <!-- time to read -->
         <i class="far fa-clock fa-fw"></i>

_layouts/page.html

@@ -4,6 +4,8 @@ layout: default
 
 {% include lang.html %}
 
+{% include assets-origin.html %}
+
 <div class="row">
 
   <!-- core -->
@@ -34,7 +36,7 @@ layout: default
   </div> <!-- #core-wrapper -->
 
   <!-- pannel -->
-  <div id="panel-wrapper" class="col-xl-3 pl-2 text-muted topbar-down">
+  <div id="panel-wrapper" class="col-xl-3 pl-2 text-muted">
 
     <div class="access">
       {% include update-list.html %}

_layouts/tag.html

@@ -3,8 +3,6 @@ layout: page
 # The layout for Tag page
 ---
 
-{% include lang.html %}
-
 <div id="page-tag">
   <h1 class="pl-lg-2">
     <i class="fa fa-tag fa-fw text-muted"></i>
@@ -12,13 +10,13 @@ layout: page
     <span class="lead text-muted pl-2">{{ page.posts | size }}</span>
   </h1>
   <ul class="post-content pl-0">
-    {% assign post_df = site.data.locales[lang].date_format.post.long %}
-
     {% for post in page.posts %}
     <li class="d-flex justify-content-between pl-md-3 pr-md-3">
       <a href="{{ post.url | relative_url }}">{{ post.title }}</a>
       <span class="dash flex-grow-1"></span>
-      <span class="text-muted small">{{ post.date | date: post_df }}</span>
+      <span class="text-muted small" data-ts="{{ post.date | date: '%s' }}" data-df="ll">
+        {{ post.date | date: '%Y-%m-%d' }}
+      </span>
     </li>
     {% endfor %}
   </ul>

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

@@ -76,7 +76,21 @@ Moon
 
 ## Block Quote
 
-> This line to shows the Block Quote.
+> This line shows the _block quote_.
+
+## Prompts
+
+> An example showing the `tip` type prompt.
+{: .prompt-tip }
+
+> An example showing the `info` type prompt.
+{: .prompt-info }
+
+> An example showing the `warning` type prompt.
+{: .prompt-warning }
+
+> An example showing the `danger` type prompt.
+{: .prompt-danger }
 
 ## Tables
 
@@ -154,6 +168,10 @@ $$ x = {-b \pm \sqrt{b^2-4ac} \over 2a} $$
 
 This is an example of `Inline Code`.
 
+## Filepath
+
+Here is the `/path/to/the/file.extend`{: .filepath}.
+
 ## Code block
 
 ### Common

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

@@ -13,7 +13,7 @@ This post will guide you how to write a post on _Chirpy_ theme. Even if you have
 
 ## Naming and Path
 
-Create a new file named `YYYY-MM-DD-TITLE.EXTENSION` and put it in the `_posts` of the root directory. Please note that the `EXTENSION` must be one of `md` and `markdown`. If you want to save time of creating files, please consider using the plugin [`Jekyll-Compose`](https://github.com/jekyll/jekyll-compose) to accomplish this.
+Create a new file named `YYYY-MM-DD-TITLE.EXTENSION`{: .filepath} and put it in the `_posts`{: .filepath} of the root directory. Please note that the `EXTENSION`{: .filepath} must be one of `md`{: .filepath} and `markdown`{: .filepath}. If you want to save time of creating files, please consider using the plugin [`Jekyll-Compose`](https://github.com/jekyll/jekyll-compose) to accomplish this.
 
 ## Front Matter
 
@@ -28,20 +28,24 @@ tags: [TAG]     # TAG names should always be lowercase
 ---
 ```
 
-> **Note**: The posts' _layout_ has been set to `post` by default, so there is no need to add the variable _layout_ in the Front Matter block.
+> The posts' _layout_ has been set to `post` by default, so there is no need to add the variable _layout_ in the Front Matter block.
+{: .prompt-tip }
 
 ### Timezone of Date
 
-In order to accurately record the release date of a post, you should not only set up the `timezone` of `_config.yml` but also provide the post's timezone in variable `date` of its Front Matter block. Format: `+/-TTTT`, e.g. `+0800`.
+In order to accurately record the release date of a post, you should not only set up the `timezone` of `_config.yml`{: .filepath} but also provide the post's timezone in variable `date` of its Front Matter block. Format: `+/-TTTT`, e.g. `+0800`.
 
 ### Categories and Tags
 
 The `categories` of each post are designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity. For instance:
 
 ```yaml
+---
 categories: [Animal, Insect]
 tags: [bee]
+---
 ```
+
 ### Author Information
 
 The author information of the post usually does not need to be filled in the _Front Matter_ , they will be obtained from variables `social.name` and the first entry of `social.links` of the configuration file by default. But you can also override it as follows:
@@ -56,7 +60,7 @@ author:
 
 ## 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 value of variable `toc` to `false`. If you want to turn off TOC for a specific post, add the following to the 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`{: .filepath} and set the value of variable `toc` to `false`. If you want to turn off TOC for a specific post, add the following to the post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
 
 ```yaml
 ---
@@ -66,7 +70,9 @@ toc: false
 
 ## Comments
 
-Similar to TOC, the [Disqus](https://disqus.com/) comments are 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 a specific post, add the following to the **Front Matter** of the post:
+The global switch of comments is defined by variable `comments.active` in the file `_config.yml`{: .filepath}. After selecting a comment system for this variable, comments will be turned on for all posts.
+
+If you want to close the comment for a specific post, add the following to the **Front Matter** of the post:
 
 ```yaml
 ---
@@ -98,26 +104,7 @@ Then you can use it like other markdown languages: surround the graph code with
 
 ## Images
 
-### Preview image
+### Caption
-
-If you want to add an image to the top of the post contents, specify the attribute `src`, `width`, `height`, and `alt` for the image:
-
-```yaml
----
-image:
-  src: /path/to/image/file
-  width: 1000   # in pixels
-  height: 400   # in pixels
-  alt: image alternative text
----
-```
-
-Except for `alt`, all other options are necessary, especially the `width` and `height`, which are related to user experience and web page loading performance. Later section ["Image size"](#image-size) will also mention this.
-
-Starting from _Chirpy v5.0.0_, the attributes `height` and `width` support abbreviations: `height` → `h`, `width` → `w`.
-
-
-### Image caption
 
 Add italics to the next line of an image，then it will become the caption and appear at the bottom of the image:
 
@@ -127,7 +114,7 @@ _Image Caption_
 ```
 {: .nolineno}
 
-### Image size
+### Size
 
 In order to prevent the page content layout from shifting when the image is loaded, we should set the width and height for each image:
 
@@ -143,9 +130,12 @@ Starting from _Chirpy v5.0.0_, `height` and `width` support abbreviations (`heig
 ```
 {: .nolineno}
 
-### Image position
+### Position
 
-By default, the image is centered, but you can specify the position by using one of the classes `normal`, `left`, and `right`. For example:
+By default, the image is centered, but you can specify the position by using one of the classes `normal`, `left`, and `right`.
+
+> Once the position is specified, the image caption should not be added.
+{: .prompt-warning }
 
 - **Normal position**
 
@@ -170,9 +160,7 @@ By default, the image is centered, but you can specify the position by using one
   ```
   {: .nolineno}
 
-> **Limitation**: Once the position of the image is specified, the image caption should not be added.
+### Shadow
-
-### Image shadow
 
 The screenshots of the program window can be considered to show the shadow effect, and the shadow will be visible in the `light` mode:
 
@@ -183,7 +171,7 @@ The screenshots of the program window can be considered to show the shadow effec
 
 ### CDN URL
 
-If you host the images on the CDN, you can save the time of repeatedly writing the CDN URL by assigning the variable `img_cdn` of `_config.yml` file:
+If you host the images on the CDN, you can save the time of repeatedly writing the CDN URL by assigning the variable `img_cdn` of `_config.yml`{: .filepath} file:
 
 ```yaml
 img_cdn: https://cdn.com
@@ -206,7 +194,7 @@ The parsing result will automatically add the CDN prefix `https://cdn.com` befor
 ```
 {: .nolineno}
 
-### Image path
+### Image Path
 
 When a post contains many images, it will be a time-consuming task to repeatedly define the path of the images. To solve this, we can define this path in the YAML block of the post:
 
@@ -231,6 +219,24 @@ The output will be:
 ```
 {: .nolineno }
 
+### Preview Image
+
+If you want to add an image to the top of the post contents, specify the attribute `src`, `width`, `height`, and `alt` for the image:
+
+```yaml
+---
+image:
+  src: /path/to/image/file
+  width: 1000   # in pixels
+  height: 400   # in pixels
+  alt: image alternative text
+---
+```
+
+Except for `alt`, all other options are necessary, especially the `width` and `height`, which are related to user experience and web page loading performance. The above section "[Size](#size)" also mentions this.
+
+Starting from _Chirpy v5.0.0_, the attributes `height` and `width` can be abbreviated: `height` → `h`, `width` → `w`. In addition, the [`img_path`](#image-path) can also be passed to the preview image, that is, when it has been set, the  attribute `src` only needs the image file name.
+
 ## 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:
@@ -241,15 +247,43 @@ pin: true
 ---
 ```
 
-## Code Block
+## Prompts
+
+There are several types of prompts: `tip`, `info`, `warning`, and `danger`. They can be generated by adding the class `prompt-{type}` to the blockquote. For example, define a prompt of type `info` as follows:
+
+```md
+> Example line for prompt.
+{: .prompt-info }
+```
+{: .nolineno }
+
+## Syntax
+
+### Inline Code
+
+```md
+`inline code part`
+```
+{: .nolineno }
+
+### Filepath Hightlight
+
+```md
+`/path/to/a/file.extend`{: .filepath}
+```
+{: .nolineno }
+
+### Code Block
 
 Markdown symbols ```` ``` ```` can easily create a code block as follows:
 
+````md
 ```
 This is a plaintext code snippet.
 ```
+````
 
-### Specifying Language
+#### Specifying Language
 
 Using ```` ```{language} ```` you will get a code block with syntax highlight:
 
@@ -259,22 +293,23 @@ key: value
 ```
 ````
 
-> **Limitation**: The Jekyll style `highlight` tag is not compatible with this theme.
+> The Jekyll tag `{% highlight %}` is not compatible with this theme.
+{: .prompt-danger }
 
-### Line Number
+#### Line Number
 
-By default, all languages except `plaintext`, `console`, and `terminal` will display line numbers. When you want to hide the line number of the code block, you can append `{: .nolineno}` at the next line:
+By default, all languages except `plaintext`, `console`, and `terminal` will display line numbers. When you want to hide the line number of a code block, add the class `nolineno` to it:
 
 ````markdown
 ```shell
 echo 'No more line numbers!'
 ```
-{: .nolineno}
+{: .nolineno }
 ````
 
-### Specifying the Filename
+#### Specifying the Filename
 
-You may have noticed that the code language will be displayed on the left side of the header of the code block. If you want to replace it with the file name, you can add the attribute `file` to achieve this:
+You may have noticed that the code language will be displayed at the top of the code block. If you want to replace it with the file name, you can add the attribute `file` to achieve this:
 
 ````markdown
 ```shell
@@ -283,7 +318,7 @@ You may have noticed that the code language will be displayed on the left side o
 {: file="path/to/file" }
 ````
 
-### Liquid Codes
+#### Liquid Codes
 
 If you want to display the **Liquid** snippet, surround the liquid code with `{% raw %}` and `{% endraw %}`:
 

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

@@ -11,7 +11,7 @@ pin: true
 
 ## Prerequisites
 
-Follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`.
+Follow the instructions in the [Jekyll Docs](https://jekyllrb.com/docs/installation/) to complete the installation of `Ruby`, `RubyGems`, `Jekyll`, and `Bundler`. In addition, [Git](https://git-scm.com/) is also required to be installed.
 
 ## Installation
 
@@ -36,18 +36,18 @@ And then execute:
 $ bash tools/init.sh
 ```
 
-> **Note**: If you don't want to deploy your site on GitHub Pages, append option `--no-gh` at the end of the above command.
+> If you don't want to deploy your site on GitHub Pages, append option `--no-gh` at the end of the above command.
+{: .prompt-info }
 
 The above command will:
 
 1. Removes some files or directories from your repository:
-    - `.travis.yml`
+    - `.travis.yml`{: .filepath}
-    - files under `_posts`
+    - files under `_posts`{: .filepath}
-    - folder `docs`
 
-2. If the option `--no-gh` is provided, the directory `.github` will be deleted. Otherwise, set up the GitHub Action workflow by removing the extension `.hook` of `.github/workflows/pages-deploy.yml.hook`, and then remove the other files and directories in the folder `.github`.
+2. If the option `--no-gh` is provided, the directory `.github`{: .filepath} will be deleted. Otherwise, set up the GitHub Action workflow by removing the extension `.hook`{: .filepath} of `.github/workflows/pages-deploy.yml.hook`{: .filepath}, and then remove the other files and directories in the folder `.github`{: .filepath}.
 
-3. Removes item `Gemfile.lock` from `.gitignore`.
+3. Removes item `Gemfile.lock` from `.gitignore`{: .filepath}.
 
 4. Creates a new commit to save the changes automatically.
 
@@ -63,7 +63,7 @@ $ bundle
 
 ### Configuration
 
-Update the variables of `_config.yml` as needed. Some of them are typical options:
+Update the variables of `_config.yml`{: .filepath} as needed. Some of them are typical options:
 
 - `url`
 - `avatar`
@@ -72,9 +72,15 @@ Update the variables of `_config.yml` as needed. Some of them are typical option
 
 ### Customing Stylesheet
 
-If you need to customize the stylesheet, copy the theme's `assets/css/style.scss` to the same path on your Jekyll site, and then add the custom style at the end of the style file.
+If you need to customize the stylesheet, copy the theme's `assets/css/style.scss`{: .filepath} to the same path on your Jekyll site, and then add the custom style at the end of the style file.
 
-Starting from [`v4.1.0`][chirpy-4.1.0], if you want to overwrite the SASS variables defined in `_sass/addon/variables.scss`, create a new file `_sass/variables-hook.scss` and assign new values to the target variable in it.
+Starting from [`v4.1.0`][chirpy-4.1.0], if you want to overwrite the SASS variables defined in `_sass/addon/variables.scss`{: .filepath}, create a new file `_sass/variables-hook.scss`{: .filepath} and assign new values to the target variable in it.
+
+### Customing Static Assets
+
+Static assets configuration was introduced in version `5.1.0`. The CDN of the static assets is defined by file `_data/assets/cross_origin.yml`{: .filepath }, and you can replace some of them according to the network conditions in the region where your website is published.
+
+Also, if you'd like to self-host the static assets, please refer to the [_chirpy-static-assets_](https://github.com/cotes2020/chirpy-static-assets#readme).
 
 ### Running Local Server
 
@@ -95,23 +101,23 @@ $ docker run -it --rm \
 
 After a while, the local service will be published at _<http://127.0.0.1:4000>_.
 
-### Deployment
+## Deployment
 
-Before the deployment begins, check out 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 starts with a slash, e.g, `/project-name`.
+Before the deployment begins, check out the file `_config.yml`{: .filepath} 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 starts with a slash, e.g, `/project-name`.
 
 Now you can choose ONE of the following methods to deploy your Jekyll site.
 
-#### Deploy by Using Github Actions
+### Deploy by Using Github Actions
 
 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 GitHub Pages service.
 
 Quickly check the files needed for GitHub Actions build:
 
-- Ensure your Jekyll site has the file `.github/workflows/pages-deploy.yml`. Otherwise, create a new one and fill in the contents of the [sample file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
+- Ensure your Jekyll site has the file `.github/workflows/pages-deploy.yml`{: .filepath}. Otherwise, create a new one and fill in the contents of the [sample file][workflow], and the value of the `on.push.branches` should be the same as your repo's default branch name.
 
-- Ensure your Jekyll site has file `tools/deploy.sh`. Otherwise, copy it from here to your Jekyll site.
+- Ensure your Jekyll site has file `tools/deploy.sh`{: .filepath}. Otherwise, copy it from here to your Jekyll site.
 
-- Furthermore, if you have committed `Gemfile.lock` to the repo, and your runtime system is not Linux, don't forget to update the platform list in the lock file:
+- Furthermore, if you have committed `Gemfile.lock`{: .filepath} to the repo, and your runtime system is not Linux, don't forget to update the platform list in the lock file:
 
   ```console
   $ bundle lock --add-platform x86_64-linux
@@ -129,7 +135,7 @@ Now publish your Jekyll site by:
 
 3. Visit your website at the address indicated by GitHub.
 
-#### Manually Build and Deploy
+### Manually Build and Deploy
 
 On self-hosted servers, you cannot enjoy the convenience of **GitHub Actions**. Therefore, you should build the site on your local machine and then upload the site files to the server.
 
@@ -149,13 +155,13 @@ $ docker run -it --rm \
     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 the target server.
+Unless you specified the output path, the generated site files will be placed in folder `_site`{: .filepath} of the project's root directory. Now you should upload those files to the target server.
 
-### Upgrading
+## Upgrading
 
 It depends on how you use the theme:
 
-- If you are using the theme gem (there will be `gem "jekyll-theme-chirpy"` in the `Gemfile`), editing the `Gemfile` and update the version number of the theme gem, for example:
+- If you are using the theme gem (there will be `gem "jekyll-theme-chirpy"` in the `Gemfile`{: .filepath}), editing the `Gemfile`{: .filepath} and update the version number of the theme gem, for example:
 
   ```diff
   - gem "jekyll-theme-chirpy", "~> 3.2", ">= 3.2.1"
@@ -171,7 +177,7 @@ It depends on how you use the theme:
 
   As the version upgrades, the critical files (for details, see the [Startup Template][starter]) and configuration options will change. Please refer to the [Upgrade Guide](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide) to keep your repo's files in sync with the latest version of the theme.
 
-- If you forked from the source project (there will be `gemspec` in the `Gemfile` of your site), then merge the [latest upstream tags][latest-tag] into your Jekyll site to complete the upgrade.
+- If you forked from the source project (there will be `gemspec` in the `Gemfile`{: .filepath} of your site), then merge the [latest upstream tags][latest-tag] into your Jekyll site to complete the upgrade.
 The merge is likely to conflict with your local modifications. Please be patient and careful to resolve these conflicts.
 
 [starter]: https://github.com/cotes2020/chirpy-starter

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

@@ -8,7 +8,7 @@ categories: [Blogging, Tutorial]
 tags: [favicon]
 ---
 
-The [favicons](https://www.favicon-generator.org/about/) of [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/) are placed in the directory `assets/img/favicons/`. You may want to replace them with your own. The following sections will guide you to create and replace the default favicons.
+The [favicons](https://www.favicon-generator.org/about/) of [**Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/) are placed in the directory `assets/img/favicons/`{: .filepath}. You may want to replace them with your own. The following sections will guide you to create and replace the default favicons.
 
 ## Generate the favicon
 
@@ -20,10 +20,10 @@ In the next step, the webpage will show all usage scenarios. You can keep the de
 
 Download the generated package, unzip and delete the following two from the extracted files:
 
-- `browserconfig.xml`
+- `browserconfig.xml`{: .filepath}
-- `site.webmanifest`
+- `site.webmanifest`{: .filepath}
 
-And then copy the remaining image files (`PNG` and `ICO`) to cover the original files in the directory `assets/img/favicons/` of your Jekyll site. If your Jekyll site doesn't have this directory yet, just create one.
+And then copy the remaining image files (`.PNG`{: .filepath} and `.ICO`{: .filepath}) to cover the original files in the directory `assets/img/favicons/`{: .filepath} of your Jekyll site. If your Jekyll site doesn't have this directory yet, just create one.
 
 The following table will help you understand the changes to the favicon files:
 
@@ -32,6 +32,7 @@ The following table will help you understand the changes to the favicon files:
 | `*.PNG`             | ✓                                 | ✗           |
 | `*.ICO`             | ✓                                 | ✗           |
 
-> Note: ✓ means keep, ✗ means delete.
+>  ✓ means keep, ✗ means delete.
+{: .prompt-info }
 
 The next time you build the site, the favicon will be replaced with a customized edition.

_posts/2021-01-03-enable-google-pv.md

@@ -37,7 +37,7 @@ It should look like this:
 
 ![google-analytics-data-stream](/posts/20210103/01-google-analytics-data-stream.png){: width="1086" height="542"}
 
-Now, click on the new data stream and grab the **Measurement ID**. It should look something like `G-V6XXXXXXXX`. Copy this to your `_config.yml` file
+Now, click on the new data stream and grab the **Measurement ID**. It should look something like `G-V6XXXXXXXX`. Copy this to your `_config.yml`{: .filepath} file:
 
 ```yaml
 google_analytics:
@@ -115,16 +115,16 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
 
 1. Clone the **Google Analytics superProxy** project on Github: <https://github.com/googleanalytics/google-analytics-super-proxy> to your local.
 
-2.  Remove the first 2 lines in the [`src/app.yaml`](https://github.com/googleanalytics/google-analytics-super-proxy/blob/master/src/app.yaml#L1-L2) file:
+2.  Remove the first 2 lines in the [`src/app.yaml`{: .filepath}](https://github.com/googleanalytics/google-analytics-super-proxy/blob/master/src/app.yaml#L1-L2) file:
 
     ```diff
     - application: your-project-id
     - version: 1
     ```
 
-3. In `src/config.py`, add the `OAUTH_CLIENT_ID` and `OAUTH_CLIENT_SECRET` that you gathered from your App Engine Dashboard.
+3. In `src/config.py`{: .filepath}, add the `OAUTH_CLIENT_ID` and `OAUTH_CLIENT_SECRET` that you gathered from your App Engine Dashboard.
 
-4.  Enter any random key for `XSRF_KEY`, your `config.py` should look similar to this
+4.  Enter any random key for `XSRF_KEY`, your `config.py`{: .filepath} should look similar to this
 
     ```python
     #!/usr/bin/python2.7
@@ -146,9 +146,11 @@ There is a detailed [tutorial](https://developers.google.com/analytics/solutions
     ```
     {: file="src/config.py"}
 
-    **Tip:** You can configure a custom domain instead of `https://PROJECT_ID.REGION_ID.r.appspot.com`. But, for the sake of keeping it simple, we will be using the Google provided default URL.
+    > You can configure a custom domain instead of `https://PROJECT_ID.REGION_ID.r.appspot.com`.
+    > But, for the sake of keeping it simple, we will be using the Google provided default URL.
+    {: .prompt-info }
 
-5.  From inside the src/ directory, deploy the app
+5.  From inside the `src/`{: .filepath} directory, deploy the app
 
     ```console
     [root@bc96abf71ef8 src]# gcloud app deploy
@@ -221,7 +223,7 @@ Once all the hard part is done, it is very easy to enable the Page View on Chirp
 
 ![superproxy-dashboard](/posts/20210103/05-superproxy-dashboard.png){: width="1210" height="694"}
 
-Update the `_config.yml` file of [**Chirpy**][chirpy-homepage] project with the values from your dashboard, to look similar to the following:
+Update the `_config.yml`{: .filepath} file of [**Chirpy**][chirpy-homepage] project with the values from your dashboard, to look similar to the following:
 
 ```yaml
 google_analytics:

_sass/addon/commons.scss

@@ -1,37 +1,30 @@
 /*
   The common styles
 */
-@import url('https://fonts.googleapis.com/css2?family=Lato&family=Source+Sans+Pro:wght@400;600;900&display=swap');
 
-@mixin mode-toggle($dark-mode: false) {
+html {
-  @if $dark-mode {
+  @media (prefers-color-scheme: light) {
-    @include dark-scheme;
+    &:not([data-mode]),
-  } @else {
+    [data-mode=light] {
       @include light-scheme;
     }
-}
 
-html:not([mode]),
+    &[data-mode=dark] {
-html[mode=light] {
+      @include dark-scheme;
-  @include mode-toggle();
+    }
-}
-
-html[mode=dark] {
-  @include mode-toggle(true);
-}
-
-@media (prefers-color-scheme: dark) {
-  html:not([mode]),
-  html[mode=dark] {
-    @include mode-toggle(true);
   }
 
-  html[mode=light] {
+  @media (prefers-color-scheme: dark) {
-    @include mode-toggle();
+    &:not([data-mode]),
+    &[data-mode=dark] {
+      @include dark-scheme;
+    }
+
+    &[data-mode=light] {
+      @include light-scheme;
+    }
   }
-}
 
-:root {
   font-size: 16px;
 }
 
@@ -54,7 +47,7 @@ h1 {
 h2 {
   @extend %heading;
   @extend %section;
-  @extend %anchor-relative;
+  @extend %anchor;
 
   font-size: 1.5rem;
 }
@@ -104,6 +97,33 @@ blockquote {
   border-left: 5px solid var(--blockquote-border-color);
   padding-left: 1rem;
   color: var(--blockquote-text-color);
+
+  &[class^="prompt-"] {
+    display: flex;
+    border-left: 0;
+    border-radius: 6px;
+    padding: 0.75rem 1.2rem;
+    color: var(--prompt-text-color);
+
+    &::before {
+      margin-right: 1rem;
+      font-family: "Font Awesome 5 Free";
+      text-align: center;
+      width: 1.25rem;
+    }
+
+    p:last-child {
+      margin-bottom: 0rem;
+    }
+  }
+
+  @include prompt("tip", "\f0eb", 400);
+
+  @include prompt("info", "\f06a");
+
+  @include prompt("warning", "\f06a");
+
+  @include prompt("danger", "\f071");
 }
 
 kbd {
@@ -160,7 +180,7 @@ footer {
   }
 }
 
-i { // fontawesome icons
+i { /* fontawesome icons */
   &.far,
   &.fas {
     @extend %no-cursor;
@@ -191,7 +211,10 @@ img[data-src] {
 
   &.shadow {
     filter: drop-shadow(2px 4px 6px rgba(0, 0, 0, 0.08));
+    box-shadow: none !important; /* cover the Bootstrap 4.6.1 styles */
   }
+
+  @extend %img-caption;
 }
 
 /* --- Panels --- */
@@ -224,7 +247,7 @@ img[data-src] {
 }
 
 #panel-wrapper {
-  // the headings
+  /* the headings */
   .panel-heading {
     @include label(inherit);
   }
@@ -247,7 +270,7 @@ img[data-src] {
     }
   }
 
-  &.topbar-down > div {
+  [data-topbar-visible=true] & > div {
     top: 6rem;
   }
 }
@@ -290,7 +313,7 @@ img[data-src] {
       margin-bottom: 0;
     }
 
-    // [scroll-focus] added by `smooth-scroll.js`
+    /* [scroll-focus] added by `smooth-scroll.js` */
     &:target:not([scroll-focus]),
     &[scroll-focus=true] > p {
       background-color: var(--footnote-target-bg);
@@ -311,7 +334,7 @@ img[data-src] {
     transition: background-color 1.5s ease-in-out;
   }
 
-  // [scroll-focus] added by `smooth-scroll.js`
+  /* [scroll-focus] added by `smooth-scroll.js` */
   @at-root sup:target:not([scroll-focus]),
   sup[scroll-focus=true] > a#{&} {
     background-color: var(--footnote-target-bg);
@@ -331,7 +354,7 @@ img[data-src] {
 
 /* --- Begin of Markdown table style --- */
 
-// it will be created by Liquid
+/* it will be created by Liquid */
 .table-wrapper {
   overflow-x: auto;
   margin-bottom: 1.5rem;
@@ -365,8 +388,8 @@ img[data-src] {
           @extend %table-cell;
         }
       }
-    } // tbody
+    } /* tbody */
-  }// table
+  }/* table */
 }
 
 /* --- post --- */
@@ -382,7 +405,7 @@ img[data-src] {
       @extend %no-cursor;
     }
 
-    // created by `_includes/img-extra.html`
+    /* created by `_includes/img-extra.html` */
     &.popup {
       cursor: zoom-in;
 
@@ -396,7 +419,7 @@ img[data-src] {
         @extend %link-hover;
       }
     }
-  } // a
+  } /* a */
 
 }
 
@@ -439,23 +462,18 @@ img[data-src] {
       }
     }
 
-    &.img-link + em {
+    &.img-link {
-      display: block;
+      @extend %img-caption;
-      text-align: center;
-      font-style: normal;
-      font-size: 80%;
-      padding: 0;
-      color: #6d6c6c;
     }
 
   }
 
   ul {
-    // attribute 'hide-bullet' was added by liquid
+    /* attribute 'hide-bullet' was added by liquid */
     .task-list-item[hide-bullet] {
       list-style-type: none;
 
-      > i { // checkbox icon
+      > i { /* checkbox icon */
         margin: 0 0.4rem 0.2rem -1.4rem;
         vertical-align: middle;
         color: var(--checkbox-color);
@@ -472,7 +490,7 @@ img[data-src] {
       vertical-align: middle;
     }
 
-  } // ul
+  } /* ul */
 
   > ol,
   > ul {
@@ -480,7 +498,7 @@ img[data-src] {
 
     li {
       ol,
-      ul { // sub list
+      ul { /* sub list */
         padding-left: 2rem;
         margin-top: 0.3rem;
       }
@@ -498,7 +516,7 @@ img[data-src] {
     margin-left: 1rem;
   }
 
-} // .post-content
+} /* .post-content */
 
 .tag:hover {
   @extend %tag-hover;
@@ -570,10 +588,6 @@ img[data-src] {
   box-shadow: 0 0 8px 0 var(--btn-box-shadow) !important;
 }
 
-.topbar-up {
-  top: -3rem !important; /* same as topbar height. */
-}
-
 .no-text-decoration {
   @include no-text-decoration;
 }
@@ -603,14 +617,14 @@ img[data-src] {
 
 /* --- Overriding --- */
 
-// magnific-popup
+/* magnific-popup */
 figure .mfp-title {
   text-align: center;
   padding-right: 0;
   margin-top: 0.5rem;
 }
 
-// mermaid
+/* mermaid */
 .mermaid {
   text-align: center;
 }
@@ -658,7 +672,7 @@ $sidebar-display: "sidebar-display";
       border-radius: 50%;
       border: 2px solid rgba(222, 222, 222, 0.7);
       overflow: hidden;
-      transform: translateZ(0); // fixed the zoom in Safari
+      transform: translateZ(0); /* fixed the zoom in Safari */
       -webkit-transition: border-color 0.35s ease-in-out;
       -moz-transition: border-color 0.35s ease-in-out;
       transition: border-color 0.35s ease-in-out;
@@ -682,7 +696,7 @@ $sidebar-display: "sidebar-display";
         transform: scale(1.2);
       }
     }
-  } // #avatar
+  } /* #avatar */
 
   .site-title {
     a {
@@ -701,7 +715,7 @@ $sidebar-display: "sidebar-display";
     line-height: 1.2rem;
     word-spacing: 1px;
     margin: 0.5rem 1.5rem 0.5rem 1.5rem;
-    min-height: 3rem; // avoid vertical shifting in multi-line words
+    min-height: 3rem; /* avoid vertical shifting in multi-line words */
     user-select: none;
   }
 
@@ -745,7 +759,7 @@ $sidebar-display: "sidebar-display";
           width: 100%;
         }
 
-        &::after { // the cursor
+        &::after { /* the cursor */
           display: table;
           visibility: hidden;
           content: "";
@@ -758,7 +772,7 @@ $sidebar-display: "sidebar-display";
           pointer-events: none;
         }
       }
-    } // li
+    } /* li */
 
     @mixin fix-cursor($top) {
       top: $top;
@@ -783,9 +797,9 @@ $sidebar-display: "sidebar-display";
         }
       }
 
-    } // @for
+    } /* @for */
 
-  } // ul
+  } /* ul */
 
   .sidebar-bottom {
     margin-bottom: 2.1rem;
@@ -836,9 +850,9 @@ $sidebar-display: "sidebar-display";
       border-radius: 50%;
     }
 
-  } // .sidebar-bottom
+  } /* .sidebar-bottom */
 
-} // #sidebar
+} /* #sidebar */
 
 @media (hover: hover) {
   #sidebar ul > li:last-child::after {
@@ -876,10 +890,14 @@ $sidebar-display: "sidebar-display";
   z-index: 50;
   border-bottom: 1px solid rgba(0, 0, 0, 0.07);
   background-color: var(--topbar-wrapper-bg);
+
+  [data-topbar-visible=false] & {
+    top: -$topbar-height; /* same as topbar height. */
+  }
 }
 
 #topbar {
-  i { // icons
+  i { /* icons */
     color: #999;
   }
 
@@ -901,7 +919,7 @@ $sidebar-display: "sidebar-display";
       }
     }
   }
-} // #topbar
+} /* #topbar */
 
 #sidebar-trigger,
 #search-trigger {
@@ -921,12 +939,6 @@ $sidebar-display: "sidebar-display";
     font-size: 0.9rem;
     color: var(--search-icon-color);
   }
-
-  .fa-times-circle { /* button 'clean up' */
-    @extend %cursor-pointer;
-
-    visibility: hidden;
-  }
 }
 
 #search-cancel { /* 'Cancel' link */
@@ -943,6 +955,7 @@ $sidebar-display: "sidebar-display";
   border-radius: 0;
   padding: 0.18rem 0.3rem;
   color: var(--text-color);
+  height: auto;
 
   &:focus {
     box-shadow: none;
@@ -1006,7 +1019,7 @@ $sidebar-display: "sidebar-display";
       margin-bottom: 1rem;
     }
 
-    i { // icons
+    i { /* icons */
       color: #818182;
       margin-right: 0.15rem;
       font-size: 80%;
@@ -1020,7 +1033,7 @@ $sidebar-display: "sidebar-display";
       -webkit-box-orient: vertical;
     }
   }
-} // #search-results
+} /* #search-results */
 
 #topbar-title {
   display: none;
@@ -1090,7 +1103,7 @@ $sidebar-display: "sidebar-display";
     }
   }
 
-  div.row:first-of-type:last-of-type { // alone
+  div.row:first-of-type:last-of-type { /* alone */
     margin-bottom: 4rem;
   }
 }
@@ -1143,33 +1156,7 @@ $sidebar-display: "sidebar-display";
 
 @media all and (max-width: 576px) {
 
-  $footer-height: $footer-height-mobile; // overwrite
+  $footer-height: $footer-height-mobile; /* overwrite */
-
-  #main > div.row:first-child > div:first-child {
-    min-height: calc(100vh - #{$topbar-height} - #{$footer-height});
-  }
-
-  #core-wrapper {
-    min-height: calc(100vh - #{$topbar-height} - #{$footer-height} - #{$bottom-min-height}) !important;
-
-    h1 {
-      margin-top: 2.2rem;
-      font-size: 1.75rem;
-    }
-  }
-
-  #avatar > a {
-    width: 5rem;
-    height: 5rem;
-  }
-
-  .site-subtitle {
-    @include ml-mr(1.8rem);
-  }
-
-  #main-wrapper {
-    padding-bottom: $footer-height;
-  }
 
   footer {
     height: $footer-height;
@@ -1189,13 +1176,53 @@ $sidebar-display: "sidebar-display";
     }
   }
 
+  #main > div.row:first-child > div:first-child {
+    min-height: calc(100vh - #{$topbar-height} - #{$footer-height});
+  }
+
+  #core-wrapper {
+    min-height: calc(100vh - #{$topbar-height} - #{$footer-height} - #{$bottom-min-height}) !important;
+
+    h1 {
+      margin-top: 2.2rem;
+      font-size: 1.75rem;
+    }
+
+    .post-content {
+      > blockquote[class^=prompt-] {
+        @include ml-mr(-1.25rem);
+        border-radius: 0;
+      }
+    }
+
+  }
+
+  #avatar > a {
+    width: 5rem;
+    height: 5rem;
+  }
+
+  .site-subtitle {
+    @include ml-mr(1.8rem);
+  }
+
+  #main-wrapper {
+    padding-bottom: $footer-height;
+  }
+
 }
 
 /* hide sidebar and panel */
 @media all and (max-width: 849px) {
-  %slide {
+  @mixin slide($append: null) {
-    -webkit-transition: transform 0.4s ease;
+    $basic: transform 0.4s ease;
-    transition: transform 0.4s ease;
+    @if $append {
+      -webkit-transition: $basic, $append;
+      transition: $basic, $append;
+    } @else {
+      -webkit-transition: $basic;
+      transition: $basic;
+    }
   }
 
   html,
@@ -1203,15 +1230,6 @@ $sidebar-display: "sidebar-display";
     overflow-x: hidden;
   }
 
-  .footnotes ol > li {
-    padding-top: 3.5rem;
-    margin-top: -3.2rem;
-
-    &:first-child {
-      margin-top: -3.5rem;
-    }
-  }
-
   [#{$sidebar-display}] {
     #sidebar {
       transform: translateX(0);
@@ -1221,13 +1239,12 @@ $sidebar-display: "sidebar-display";
     #main-wrapper {
       transform: translateX(#{$sidebar-width});
     }
-
   }
 
   #sidebar {
-    @extend %slide;
+    @include slide;
 
-    transform: translateX(-#{$sidebar-width}); // hide
+    transform: translateX(-#{$sidebar-width}); /* hide */
     -webkit-transform: translateX(-#{$sidebar-width});
 
     .cursor {
@@ -1238,7 +1255,7 @@ $sidebar-display: "sidebar-display";
   }
 
   #main-wrapper {
-    @extend %slide;
+    @include slide;
 
     padding-top: $topbar-height;
   }
@@ -1253,15 +1270,11 @@ $sidebar-display: "sidebar-display";
   }
 
   #topbar-wrapper {
-    @extend %slide;
+    @include slide(top 0.2s ease);
 
     left: 0;
   }
 
-  .topbar-up {
-    top: 0 !important;
-  }
-
   #main > div.row:first-child > div:nth-child(1),
   #main > div.row:first-child > div:nth-child(2) {
     margin-top: 0;
@@ -1277,10 +1290,6 @@ $sidebar-display: "sidebar-display";
     &.loaded ~ a {
       margin-right: 1rem;
     }
-
-    .fa-times-circle {
-      right: 5.2rem;
-    }
   }
 
   #search-input {
@@ -1306,7 +1315,13 @@ $sidebar-display: "sidebar-display";
     }
   }
 
-} // max-width: 849px
+} /* max-width: 849px */
+
+@media all and (max-width: 849px) and (orientation: portrait) {
+  [data-topbar-visible=false] #topbar-wrapper {
+    top: 0;
+  }
+}
 
 /* Phone & Pad */
 @media all and (min-width: 577px) and (max-width: 1199px) {
@@ -1335,6 +1350,10 @@ $sidebar-display: "sidebar-display";
     min-width: 150px;
   }
 
+  #search-hints {
+    display: none;
+  }
+
   #search-result-wrapper {
     margin-top: 3rem;
   }
@@ -1349,10 +1368,6 @@ $sidebar-display: "sidebar-display";
     right: 1.2rem;
   }
 
-  .topbar-up {
-    box-shadow: none !important;
-  }
-
   #topbar-title {
     text-align: left;
   }
@@ -1492,10 +1507,6 @@ $sidebar-display: "sidebar-display";
     }
   }
 
-  #search-hints {
-    display: none;
-  }
-
   .post-content {
     font-size: 1.03rem;
   }
@@ -1523,10 +1534,6 @@ $sidebar-display: "sidebar-display";
     }
   }
 
-  #search-wrapper .fa-times-circle {
-    right: 2.6rem;
-  }
-
 }
 
 @media all and (min-width: 1400px) and (max-width: 1650px) {
@@ -1613,7 +1620,7 @@ $sidebar-display: "sidebar-display";
         margin-top: 0.3rem;
       }
 
-    } // .profile-wrapper (min-width: 1650px)
+    } /* .profile-wrapper (min-width: 1650px) */
 
     ul {
       padding-left: 2.5rem;
@@ -1660,7 +1667,7 @@ $sidebar-display: "sidebar-display";
         @include ml-mr(0.15rem);
 
         height: $icon-block-size;
-        margin-bottom: 0.5rem; // wrap line
+        margin-bottom: 0.5rem; /* wrap line */
       }
 
       i {
@@ -1683,9 +1690,9 @@ $sidebar-display: "sidebar-display";
         top: 0.9rem;
       }
 
-    } // .sidebar-bottom
+    } /* .sidebar-bottom */
 
-  } // #sidebar
+  } /* #sidebar */
 
   footer > div.d-flex {
     width: 92%;
@@ -1698,7 +1705,7 @@ $sidebar-display: "sidebar-display";
     }
   }
 
-} // min-width: 1650px
+} /* min-width: 1650px */
 
 @media all and (min-width: 1700px) {
   #topbar-wrapper {

_sass/addon/module.scss

@@ -13,19 +13,21 @@
 %section {
   #core-wrapper & {
     margin-top: 2.5rem;
-    margin-bottom: 2rem;
+    margin-bottom: 1.25rem;
+
+    &:focus {
+      outline: none; /* avoid outline in Safari */
+    }
   }
 }
 
 %anchor {
   .anchor {
-    font-size: 1rem;
+    font-size: 80%;
-    margin-left: 0.5rem;
   }
 
   @media (hover: hover) {
     .anchor {
-      border-bottom: none !important;
       visibility: hidden;
       opacity: 0;
       transition: opacity 0.25s ease-in, visibility 0s ease-in 0.25s;
@@ -41,15 +43,6 @@
   }
 }
 
-%anchor-relative {
-  @extend %anchor;
-
-  .anchor {
-    position: relative;
-    bottom: 1px;
-  }
-}
-
 %tag-hover {
   background: var(--tag-hover);
   transition: background 0.35s ease-in-out;
@@ -95,10 +88,15 @@
   font-style: normal;
 }
 
-/* ---------- scss mixin --------- */
+%img-caption {
-
+  + em {
-@mixin no-text-decoration {
+    display: block;
-  text-decoration: none;
+    text-align: center;
+    font-style: normal;
+    font-size: 80%;
+    padding: 0;
+    color: #6d6c6c;
+  }
 }
 
 %sidebar-links {
@@ -106,6 +104,12 @@
   user-select: none;
 }
 
+/* ---------- scss mixin --------- */
+
+@mixin no-text-decoration {
+  text-decoration: none;
+}
+
 @mixin ml-mr($value) {
   margin-left: $value;
   margin-right: $value;
@@ -133,3 +137,15 @@
   -ms-transform: translateX(-50%);
   transform: translateX(-50%);
 }
+
+@mixin prompt($type, $fw-icon, $icon-weight: 900) {
+  &.prompt-#{$type} {
+    background-color: var(--prompt-#{$type}-bg);
+
+    &::before {
+      content: $fw-icon;
+      color: var(--prompt-#{$type}-icon-color);
+      font-weight: $icon-weight;
+    }
+  }
+}

_sass/addon/syntax.scss

@@ -5,24 +5,28 @@
 @import "colors/light-syntax";
 @import "colors/dark-syntax";
 
-html:not([mode]),
+html {
-html[mode=light] {
+  @media (prefers-color-scheme: light) {
+    &:not([data-mode]),
+    [data-mode=light] {
       @include light-syntax;
-}
+    }
 
-html[mode=dark] {
+    &[data-mode=dark] {
       @include dark-syntax;
-}
+    }
+  }
 
-@media (prefers-color-scheme: dark) {
+  @media (prefers-color-scheme: dark) {
-  html:not([mode]),
+    &:not([data-mode]),
-  html[mode=dark] {
+    &[data-mode=dark] {
       @include dark-syntax;
     }
 
-  html[mode=light] {
+    &[data-mode=light] {
       @include light-syntax;
     }
+  }
 }
 
 /* -- Codes Snippet -- */
@@ -95,7 +99,7 @@ $code-radius: 6px;
     user-select: none;
   }
 
-} //.highlight
+} /* .highlight */
 
 code {
   -webkit-hyphens: none;
@@ -110,8 +114,15 @@ code {
     background-color: var(--inline-code-bg);
   }
 
+  &.filepath {
+    background-color: inherit;
+    color: var(--filepath-text-color);
+    font-weight: 600;
+    padding: 0;
+  }
+
   a > &.highlighter-rouge {
-    padding-bottom: 0; // show link's underlinke
+    padding-bottom: 0; /* show link's underlinke */
     color: inherit;
   }
 
@@ -119,7 +130,7 @@ code {
     border-bottom: none;
   }
 
-  blockquote &.highlighter-rouge {
+  blockquote & {
     color: inherit;
   }
 
@@ -131,8 +142,10 @@ code {
 td.rouge-code {
   @extend %code-snippet-padding;
 
-  // Prevent some browser extends from
+  /*
-  // changing the URL string of code block.
+    Prevent some browser extends from
+    changing the URL string of code block.
+  */
   a {
     color: inherit !important;
     border-bottom: none !important;
@@ -186,9 +199,9 @@ div {
       ($dot-size + $dot-margin) * 2 0 0 var(--code-header-muted-color);
   }
 
-  // the label block
+  /* the label block */
   span {
-    // label icon
+    /* label icon */
     i {
       font-size: 1rem;
       margin-right: 0.4rem;
@@ -201,19 +214,19 @@ div {
 
     @at-root [file] #{&} > i {
       position: relative;
-      top: 1px; // center the file icon
+      top: 1px; /* center the file icon */
     }
 
-    // label text
+    /* label text */
     &::after {
-      content: attr(label-text);
+      content: attr(data-label-text);
       font-size: 0.85rem;
       font-weight: 600;
       color: var(--code-header-text-color);
     }
   }
 
-  // clipboard
+  /* clipboard */
   button {
     @extend %cursor-pointer;
 

_sass/addon/variables.scss

@@ -4,24 +4,24 @@
 
 /* sidebar */
 
-$sidebar-width: 260px !default;        // the basic width
+$sidebar-width: 260px !default;        /* the basic width */
-$sidebar-width-small: 210px !default;  // screen width: >= 850px, <= 1199px (iPad landscape)
+$sidebar-width-small: 210px !default;  /* screen width: >= 850px, <= 1199px (iPad landscape) */
-$sidebar-width-large: 350px !default;  // screen width: >= 1650px
+$sidebar-width-large: 350px !default;  /* screen width: >= 1650px */
 
 /* tabs of sidebar */
 
-$tab-count: 5 !default;   // backward compatible (version <= 4.0.2)
+$tab-count: 5 !default;   /* backward compatible (version <= 4.0.2) */
 $tab-height: 3rem !default;
 $tab-cursor-height: 1.6rem !default;
 
-$cursor-width: 2px !default;    // the cursor width of the selected tab
+$cursor-width: 2px !default;    /* the cursor width of the selected tab */
 
 /* other framework sizes */
 
 $topbar-height: 3rem !default;
 
 $footer-height: 5rem !default;
-$footer-height-mobile: 6rem !default;   // screen width: <= 576px
+$footer-height-mobile: 6rem !default;   /* screen width: <= 576px */
 
 $main-content-max-width: 1150px !default;
 

_sass/colors/dark-syntax.scss

@@ -78,6 +78,7 @@
   --code-header-muted-color: rgb(60 60 60);
   --code-header-icon-color: rgb(86 86 86);
   --clipboard-checked-color: #2bcc2b;
+  --filepath-text-color: #bdbdbd;
 
   .highlight {
     .gp { color: #818c96; }

_sass/colors/dark-typography.scss

@@ -69,6 +69,15 @@
   --kbd-wrap-color: #6a6a6a;
   --kbd-text-color: #d3d3d3;
   --kbd-bg-color: #242424;
+  --prompt-text-color: rgb(216 212 212 / 75%);
+  --prompt-tip-bg: rgba(77, 187, 95, 0.2);
+  --prompt-tip-icon-color: rgb(5 223 5 / 68%);
+  --prompt-info-bg: rgb(7 59 104 / 80%);
+  --prompt-info-icon-color: #0075d1;
+  --prompt-warning-bg: rgb(90 69 3 / 95%);
+  --prompt-warning-icon-color: rgb(255 165 0 / 80%);
+  --prompt-danger-bg: rgb(86 28 8 / 80%);
+  --prompt-danger-icon-color: #cd0202;
 
   /* tags */
   --tag-border: rgb(59, 79, 88);
@@ -145,4 +154,4 @@
     color-scheme: none;
   }
 
-} // dark-scheme
+} /* dark-scheme */

_sass/colors/light-syntax.scss

@@ -76,4 +76,9 @@
   --code-header-icon-color: #d1d1d1;
   --clipboard-checked-color: #43c743;
 
-} // light-syntax
+  [class^=prompt-] {
+    --inline-code-bg: #fbfafa;
+    --highlighter-rouge-color: rgb(82 82 82);
+  }
+
+} /* light-syntax */

_sass/colors/light-typography.scss

@@ -68,6 +68,19 @@
   --kbd-wrap-color: #bdbdbd;
   --kbd-text-color: var(--text-color);
   --kbd-bg-color: white;
+  --prompt-text-color: rgb(46 46 46 / 77%);
+  --prompt-tip-bg: rgb(123 247 144 / 20%);
+  --prompt-tip-icon-color: #03b303;
+  --prompt-info-bg: #e1f5fe;
+  --prompt-info-icon-color: #0070cb;
+  --prompt-warning-bg: rgb(255 243 205);
+  --prompt-warning-icon-color: #ef9c03;
+  --prompt-danger-bg: rgb(248 215 218 / 56%);
+  --prompt-danger-icon-color: #df3c30;
+
+  [class^=prompt-] {
+    --link-underline-color: rgb(219 216 216);
+  }
 
   /* Categories */
   --categories-hover-bg: var(--btn-border-color);
@@ -78,4 +91,4 @@
   --timeline-node-bg: #c2c6cc;
   --timeline-year-dot-color: #ffffff;
 
-} // light-scheme
+} /* light-scheme */

_sass/jekyll-theme-chirpy.scss

@@ -1,7 +1,7 @@
 /*!
  * The styles for Jekyll theme Chirpy
  *
- * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy)
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy)
  * © 2019 Cotes Chung
  * MIT Licensed
  */

_sass/layout/post.scss

@@ -55,7 +55,7 @@ img.preview-img {
   border-bottom: 1px double var(--main-border-color);
   font-size: 0.85rem;
 
-  .post-meta a {
+  .post-meta a:not(:hover) {
     @extend %link-underline;
   }
 }

_tabs/about.md

@@ -4,5 +4,5 @@ icon: fas fa-info-circle
 order: 4
 ---
 
-
+> Add Markdown syntax content to file `_tabs/about.md`{: .filepath } 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.
+{: .prompt-tip }

assets/404.html

@@ -7,8 +7,6 @@ redirect_from:
   - /norobots/
   - /assets/
   - /posts/
-
-dynamic_title: true
 ---
 
 {% include lang.html %}

assets/js/data/search.json

@@ -1,5 +1,6 @@
 ---
 layout: compress
+swcache: true
 ---
 
 [

assets/js/data/swcache.js

@@ -9,13 +9,7 @@ const resource = [
   /* --- CSS --- */
   '{{ "/assets/css/style.css" | relative_url }}',
 
-  /* --- JavaScripts --- */
+  /* --- PWA --- */
-  {% assign js_path = "/assets/js" | relative_url %}
-  '{{ js_path }}/dist/home.min.js',
-  '{{ js_path }}/dist/page.min.js',
-  '{{ js_path }}/dist/post.min.js',
-  '{{ js_path }}/dist/categories.min.js',
-  '{{ js_path }}/data/search.json',
   '{{ "/app.js" | relative_url }}',
   '{{ "/sw.js" | relative_url }}',
 
@@ -26,30 +20,27 @@ const resource = [
     '{{ tab.url | relative_url }}',
   {% endfor %}
 
-  /* --- Favicons --- */
+  /* --- Favicons & compressed JS --- */
-  {% assign favicon_path = "/assets/img/favicons" | relative_url %}
+  {% assign cache_list = site.static_files | where: 'swcache', true  %}
-
+  {% for file in cache_list %}
-  '{{ favicon_path }}/android-chrome-192x192.png',
+    '{{ file.path | relative_url }}'{%- unless forloop.last -%},{%- endunless -%}
-  '{{ favicon_path }}/android-chrome-512x512.png',
+  {% endfor %}
-  '{{ favicon_path }}/apple-touch-icon.png',
-  '{{ favicon_path }}/favicon-16x16.png',
-  '{{ favicon_path }}/favicon-32x32.png',
-  '{{ favicon_path }}/favicon.ico',
-  '{{ favicon_path }}/mstile-150x150.png',
-  '{{ favicon_path }}/site.webmanifest',
-  '{{ favicon_path }}/browserconfig.xml'
 
 ];
 
 /* The request url with below domain will be cached */
 const allowedDomains = [
-  {% if site.google_analytics.id != '' %}
+  {% if site.google_analytics.id != empty and site.google_analytics.id %}
     'www.googletagmanager.com',
     'www.google-analytics.com',
   {% endif %}
 
   '{{ site.url | split: "//" | last }}',
 
+  {% if site.img_cdn contains '//' and site.img_cdn %}
+    '{{ site.img_cdn | split: '//' | last | split: '/' | first }}',
+  {% endif %}
+
   'fonts.gstatic.com',
   'fonts.googleapis.com',
   'cdn.jsdelivr.net',

assets/js/dist/categories.min.js

@@ -1,6 +1,6 @@
 /*!
- * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
-$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))}),$(function(){$(".mode-toggle").click(e=>{const o=$(e.target);let t=o.prop("tagName")==="button".toUpperCase()?o:o.parent();t.blur(),flipMode()})}),$(function(){const e=$("#sidebar-trigger"),o=$("#search-trigger"),t=$("#search-cancel"),s=$("#search-cleaner"),a=$("#main"),l=$("#topbar-title"),r=$("#search-wrapper"),n=$("#search-result-wrapper"),d=$("#search-results"),i=$("#search-input"),c=$("#search-hints"),u=function(){let e=0;return{block(){e=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(e)},getOffset(){return e}}}(),f={on(){e.addClass("unloaded"),l.addClass("unloaded"),o.addClass("unloaded"),r.addClass("d-flex"),t.addClass("loaded")},off(){t.removeClass("loaded"),r.removeClass("d-flex"),e.removeClass("unloaded"),l.removeClass("unloaded"),o.removeClass("unloaded")}},p=function(){let e=!1;return{on(){e||(u.block(),n.removeClass("unloaded"),a.addClass("unloaded"),e=!0)},off(){e&&(d.empty(),c.hasClass("unloaded")&&c.removeClass("unloaded"),n.addClass("unloaded"),s.removeClass("visible"),a.removeClass("unloaded"),u.release(),i.val(""),e=!1)},isVisible(){return e}}}();function h(){return t.hasClass("loaded")}o.click(function(){f.on(),p.on(),i.focus()}),t.click(function(){f.off(),p.off()}),i.focus(function(){r.addClass("input-focus")}),i.focusout(function(){r.removeClass("input-focus")}),i.on("keyup",function(e){8===e.keyCode&&""===i.val()?h()?c.removeClass("unloaded"):p.off():""!==i.val()&&(p.on(),s.hasClass("visible")||s.addClass("visible"),h()&&c.addClass("unloaded"))}),s.on("click",function(){i.val(""),h()?(c.removeClass("unloaded"),d.empty()):p.off(),i.focus(),s.removeClass("visible")})}),$(function(){var e=function(){const e="sidebar-display";let o=!1;const t=$("body");return{toggle(){!1===o?t.attr(e,""):t.removeAttr(e),o=!o}}}();$("#sidebar-trigger").click(e.toggle),$("#mask").click(e.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const t=$("#topbar-wrapper"),s=$("#panel-wrapper"),a=$("#search-input"),l="topbar-up",r="topbar-down",n="toc-scrolling-up";let o,d=0;const i=t.outerHeight(),c=t.outerHeight();$(window).scroll(function(e){$("#topbar-title").is(":hidden")&&(o=!0)}),setInterval(function(){o&&(function(){var e,o=$(this).scrollTop();Math.abs(d-o)<=i||(o>d?o>c&&(t.removeClass(r).addClass(l),s.removeClass(r),a.is(":focus")&&a.blur()):o+$(window).height()<$(document).height()&&(void 0!==(e=t.attr(n))?"false"===e&&t.removeAttr(n):(t.removeClass(l).addClass(r),s.addClass(r))),d=o)}(),o=!1)},250)}),$(function(){const e=$("#topbar-title"),o=$("div.post>h1"),t=e.text().trim();let s=(0<o.length?o:$("h1")).text().trim();($("#page-category").length||$("#page-tag").length)&&/\s/.test(s)&&(s=s.replace(/[0-9]/g,"").trim()),$(window).scroll(function(){return!($("#post-list").length||o.is(":hidden")||e.is(":hidden")||$("#sidebar.sidebar-expand").length)&&void(95<=$(this).scrollTop()?e.text()!==s&&e.text(s):e.text()!==t&&e.text(t))}),e.click(function(){$("body,html").animate({scrollTop:0},800)})}),$(function(){const e=$(".collapse");e.on("hide.bs.collapse",function(){var e="h_"+$(this).attr("id").substring("l_".length);e&&($(`#${e} .far.fa-folder-open`).attr("class","far fa-folder fa-fw"),$(`#${e} i.fas`).addClass("rotate"),$("#"+e).removeClass("hide-border-bottom"))}),e.on("show.bs.collapse",function(){var e="h_"+$(this).attr("id").substring("l_".length);e&&($(`#${e} .far.fa-folder`).attr("class","far fa-folder-open fa-fw"),$(`#${e} i.fas`).removeClass("rotate"),$("#"+e).addClass("hide-border-bottom"))})});
+$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))});const LocaleHelper=function(){const e=$('meta[name="prefer-datetime-locale"]'),o=0<e.length?e.attr("content").toLowerCase():$("html").attr("lang").substr(0,2),t="data-ts",a="data-df";return{locale:()=>o,attrTimestamp:()=>t,attrDateFormat:()=>a,getTimestamp:e=>Number(e.attr(t)),getDateFormat:e=>e.attr(a)}}();$(function(){$(".mode-toggle").click(e=>{const o=$(e.target);let t=o.prop("tagName")==="button".toUpperCase()?o:o.parent();t.blur(),flipMode()})});const ScrollHelper=function(){const e=$("body"),o="data-topbar-visible",t=$("#topbar-wrapper").outerHeight();let a=0,r=!1,l=!1;return{hideTopbar:()=>e.attr(o,!1),showTopbar:()=>e.attr(o,!0),addScrollUpTask:()=>{a+=1,r=r||!0},popScrollUpTask:()=>--a,hasScrollUpTask:()=>0<a,topbarLocked:()=>!0===r,unlockTopbar:()=>r=!1,getTopbarHeight:()=>t,orientationLocked:()=>!0===l,lockOrientation:()=>l=!0,unLockOrientation:()=>l=!1}}();$(function(){const e=$("#sidebar-trigger"),o=$("#search-trigger"),t=$("#search-cancel"),a=$("#main"),r=$("#topbar-title"),l=$("#search-wrapper"),n=$("#search-result-wrapper"),s=$("#search-results"),i=$("#search-input"),c=$("#search-hints"),d=function(){let e=0;return{block(){e=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(e)},getOffset(){return e}}}(),p={on(){e.addClass("unloaded"),r.addClass("unloaded"),o.addClass("unloaded"),l.addClass("d-flex"),t.addClass("loaded")},off(){t.removeClass("loaded"),l.removeClass("d-flex"),e.removeClass("unloaded"),r.removeClass("unloaded"),o.removeClass("unloaded")}},u=function(){let e=!1;return{on(){e||(d.block(),n.removeClass("unloaded"),a.addClass("unloaded"),e=!0)},off(){e&&(s.empty(),c.hasClass("unloaded")&&c.removeClass("unloaded"),n.addClass("unloaded"),a.removeClass("unloaded"),d.release(),i.val(""),e=!1)},isVisible(){return e}}}();function f(){return t.hasClass("loaded")}o.click(function(){p.on(),u.on(),i.focus()}),t.click(function(){p.off(),u.off()}),i.focus(function(){l.addClass("input-focus")}),i.focusout(function(){l.removeClass("input-focus")}),i.on("input",()=>{""===i.val()?f()?c.removeClass("unloaded"):u.off():(u.on(),f()&&c.addClass("unloaded"))})}),$(function(){var e=function(){const e="sidebar-display";let o=!1;const t=$("body");return{toggle(){!1===o?t.attr(e,""):t.removeAttr(e),o=!o}}}();$("#sidebar-trigger").click(e.toggle),$("#mask").click(e.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const o=$("#search-input"),t=ScrollHelper.getTopbarHeight();let e,a=0;function r(){0!==$(window).scrollTop()&&(ScrollHelper.lockOrientation(),ScrollHelper.hideTopbar())}screen.orientation?screen.orientation.onchange=()=>{var e=screen.orientation.type;"landscape-primary"!==e&&"landscape-secondary"!==e||r()}:$(window).on("orientationchange",()=>{$(window).width()<$(window).height()&&r()}),$(window).scroll(()=>{e=e||!0}),setInterval(()=>{e&&(function(){var e=$(this).scrollTop();if(!(Math.abs(a-e)<=t)){if(e>a)ScrollHelper.hideTopbar(),o.is(":focus")&&o.blur();else if(e+$(window).height()<$(document).height()){if(ScrollHelper.hasScrollUpTask())return;ScrollHelper.topbarLocked()?ScrollHelper.unlockTopbar():ScrollHelper.orientationLocked()?ScrollHelper.unLockOrientation():ScrollHelper.showTopbar()}a=e}}(),e=!1)},250)}),$(function(){var o="div.post>h1:first-of-type";const t=$(o),n=$("#topbar-title");if(0!==t.length&&!t.hasClass("dynamic-title")&&!n.is(":hidden")){const s=n.text().trim();let a=t.text().trim(),r=!1,l=0;($("#page-category").length||$("#page-tag").length)&&/\s/.test(a)&&(a=a.replace(/[0-9]/g,"").trim()),t.offset().top<$(window).scrollTop()&&n.text(a);let e=new IntersectionObserver(e=>{var o,t;r?(o=$(window).scrollTop(),t=l<o,l=o,e=e[0],t?0===e.intersectionRatio&&n.text(a):1===e.intersectionRatio&&n.text(s)):r=!0},{rootMargin:"-48px 0px 0px 0px",threshold:[0,1]});e.observe(document.querySelector(o)),n.click(function(){$("body,html").animate({scrollTop:0},800)})}}),$(function(){const e=$(".collapse");e.on("hide.bs.collapse",function(){var e="h_"+$(this).attr("id").substring("l_".length);e&&($(`#${e} .far.fa-folder-open`).attr("class","far fa-folder fa-fw"),$(`#${e} i.fas`).addClass("rotate"),$("#"+e).removeClass("hide-border-bottom"))}),e.on("show.bs.collapse",function(){var e="h_"+$(this).attr("id").substring("l_".length);e&&($(`#${e} .far.fa-folder`).attr("class","far fa-folder-open fa-fw"),$(`#${e} i.fas`).removeClass("rotate"),$("#"+e).addClass("hide-border-bottom"))})});

assets/js/dist/commons.min.js

@@ -1,6 +1,6 @@
 /*!
- * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */
-$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))}),$(function(){$(".mode-toggle").click(e=>{const o=$(e.target);let t=o.prop("tagName")==="button".toUpperCase()?o:o.parent();t.blur(),flipMode()})}),$(function(){const e=$("#sidebar-trigger"),o=$("#search-trigger"),t=$("#search-cancel"),s=$("#search-cleaner"),l=$("#main"),a=$("#topbar-title"),n=$("#search-wrapper"),r=$("#search-result-wrapper"),d=$("#search-results"),i=$("#search-input"),c=$("#search-hints"),u=function(){let e=0;return{block(){e=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(e)},getOffset(){return e}}}(),p={on(){e.addClass("unloaded"),a.addClass("unloaded"),o.addClass("unloaded"),n.addClass("d-flex"),t.addClass("loaded")},off(){t.removeClass("loaded"),n.removeClass("d-flex"),e.removeClass("unloaded"),a.removeClass("unloaded"),o.removeClass("unloaded")}},f=function(){let e=!1;return{on(){e||(u.block(),r.removeClass("unloaded"),l.addClass("unloaded"),e=!0)},off(){e&&(d.empty(),c.hasClass("unloaded")&&c.removeClass("unloaded"),r.addClass("unloaded"),s.removeClass("visible"),l.removeClass("unloaded"),u.release(),i.val(""),e=!1)},isVisible(){return e}}}();function h(){return t.hasClass("loaded")}o.click(function(){p.on(),f.on(),i.focus()}),t.click(function(){p.off(),f.off()}),i.focus(function(){n.addClass("input-focus")}),i.focusout(function(){n.removeClass("input-focus")}),i.on("keyup",function(e){8===e.keyCode&&""===i.val()?h()?c.removeClass("unloaded"):f.off():""!==i.val()&&(f.on(),s.hasClass("visible")||s.addClass("visible"),h()&&c.addClass("unloaded"))}),s.on("click",function(){i.val(""),h()?(c.removeClass("unloaded"),d.empty()):f.off(),i.focus(),s.removeClass("visible")})}),$(function(){var e=function(){const e="sidebar-display";let o=!1;const t=$("body");return{toggle(){!1===o?t.attr(e,""):t.removeAttr(e),o=!o}}}();$("#sidebar-trigger").click(e.toggle),$("#mask").click(e.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const t=$("#topbar-wrapper"),s=$("#panel-wrapper"),l=$("#search-input"),a="topbar-up",n="topbar-down",r="toc-scrolling-up";let o,d=0;const i=t.outerHeight(),c=t.outerHeight();$(window).scroll(function(e){$("#topbar-title").is(":hidden")&&(o=!0)}),setInterval(function(){o&&(function(){var e,o=$(this).scrollTop();Math.abs(d-o)<=i||(o>d?o>c&&(t.removeClass(n).addClass(a),s.removeClass(n),l.is(":focus")&&l.blur()):o+$(window).height()<$(document).height()&&(void 0!==(e=t.attr(r))?"false"===e&&t.removeAttr(r):(t.removeClass(a).addClass(n),s.addClass(n))),d=o)}(),o=!1)},250)}),$(function(){const e=$("#topbar-title"),o=$("div.post>h1"),t=e.text().trim();let s=(0<o.length?o:$("h1")).text().trim();($("#page-category").length||$("#page-tag").length)&&/\s/.test(s)&&(s=s.replace(/[0-9]/g,"").trim()),$(window).scroll(function(){return!($("#post-list").length||o.is(":hidden")||e.is(":hidden")||$("#sidebar.sidebar-expand").length)&&void(95<=$(this).scrollTop()?e.text()!==s&&e.text(s):e.text()!==t&&e.text(t))}),e.click(function(){$("body,html").animate({scrollTop:0},800)})});
+$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))});const LocaleHelper=function(){const e=$('meta[name="prefer-datetime-locale"]'),o=0<e.length?e.attr("content").toLowerCase():$("html").attr("lang").substr(0,2),t="data-ts",a="data-df";return{locale:()=>o,attrTimestamp:()=>t,attrDateFormat:()=>a,getTimestamp:e=>Number(e.attr(t)),getDateFormat:e=>e.attr(a)}}();$(function(){$(".mode-toggle").click(e=>{const o=$(e.target);let t=o.prop("tagName")==="button".toUpperCase()?o:o.parent();t.blur(),flipMode()})});const ScrollHelper=function(){const e=$("body"),o="data-topbar-visible",t=$("#topbar-wrapper").outerHeight();let a=0,r=!1,l=!1;return{hideTopbar:()=>e.attr(o,!1),showTopbar:()=>e.attr(o,!0),addScrollUpTask:()=>{a+=1,r=r||!0},popScrollUpTask:()=>--a,hasScrollUpTask:()=>0<a,topbarLocked:()=>!0===r,unlockTopbar:()=>r=!1,getTopbarHeight:()=>t,orientationLocked:()=>!0===l,lockOrientation:()=>l=!0,unLockOrientation:()=>l=!1}}();$(function(){const e=$("#sidebar-trigger"),o=$("#search-trigger"),t=$("#search-cancel"),a=$("#main"),r=$("#topbar-title"),l=$("#search-wrapper"),n=$("#search-result-wrapper"),s=$("#search-results"),c=$("#search-input"),i=$("#search-hints"),d=function(){let e=0;return{block(){e=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(e)},getOffset(){return e}}}(),p={on(){e.addClass("unloaded"),r.addClass("unloaded"),o.addClass("unloaded"),l.addClass("d-flex"),t.addClass("loaded")},off(){t.removeClass("loaded"),l.removeClass("d-flex"),e.removeClass("unloaded"),r.removeClass("unloaded"),o.removeClass("unloaded")}},u=function(){let e=!1;return{on(){e||(d.block(),n.removeClass("unloaded"),a.addClass("unloaded"),e=!0)},off(){e&&(s.empty(),i.hasClass("unloaded")&&i.removeClass("unloaded"),n.addClass("unloaded"),a.removeClass("unloaded"),d.release(),c.val(""),e=!1)},isVisible(){return e}}}();function f(){return t.hasClass("loaded")}o.click(function(){p.on(),u.on(),c.focus()}),t.click(function(){p.off(),u.off()}),c.focus(function(){l.addClass("input-focus")}),c.focusout(function(){l.removeClass("input-focus")}),c.on("input",()=>{""===c.val()?f()?i.removeClass("unloaded"):u.off():(u.on(),f()&&i.addClass("unloaded"))})}),$(function(){var e=function(){const e="sidebar-display";let o=!1;const t=$("body");return{toggle(){!1===o?t.attr(e,""):t.removeAttr(e),o=!o}}}();$("#sidebar-trigger").click(e.toggle),$("#mask").click(e.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const o=$("#search-input"),t=ScrollHelper.getTopbarHeight();let e,a=0;function r(){0!==$(window).scrollTop()&&(ScrollHelper.lockOrientation(),ScrollHelper.hideTopbar())}screen.orientation?screen.orientation.onchange=()=>{var e=screen.orientation.type;"landscape-primary"!==e&&"landscape-secondary"!==e||r()}:$(window).on("orientationchange",()=>{$(window).width()<$(window).height()&&r()}),$(window).scroll(()=>{e=e||!0}),setInterval(()=>{e&&(function(){var e=$(this).scrollTop();if(!(Math.abs(a-e)<=t)){if(e>a)ScrollHelper.hideTopbar(),o.is(":focus")&&o.blur();else if(e+$(window).height()<$(document).height()){if(ScrollHelper.hasScrollUpTask())return;ScrollHelper.topbarLocked()?ScrollHelper.unlockTopbar():ScrollHelper.orientationLocked()?ScrollHelper.unLockOrientation():ScrollHelper.showTopbar()}a=e}}(),e=!1)},250)}),$(function(){var o="div.post>h1:first-of-type";const t=$(o),n=$("#topbar-title");if(0!==t.length&&!t.hasClass("dynamic-title")&&!n.is(":hidden")){const s=n.text().trim();let a=t.text().trim(),r=!1,l=0;($("#page-category").length||$("#page-tag").length)&&/\s/.test(a)&&(a=a.replace(/[0-9]/g,"").trim()),t.offset().top<$(window).scrollTop()&&n.text(a);let e=new IntersectionObserver(e=>{var o,t;r?(o=$(window).scrollTop(),t=l<o,l=o,e=e[0],t?0===e.intersectionRatio&&n.text(a):1===e.intersectionRatio&&n.text(s)):r=!0},{rootMargin:"-48px 0px 0px 0px",threshold:[0,1]});e.observe(document.querySelector(o)),n.click(function(){$("body,html").animate({scrollTop:0},800)})}});

assets/js/dist/misc.min.js

@@ -0,0 +1,6 @@
+/*!
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * © 2019 Cotes Chung
+ * MIT Licensed
+ */
+$(function(){$(window).scroll(()=>{50<$(this).scrollTop()&&"none"===$("#sidebar-trigger").css("display")?$("#back-to-top").fadeIn():$("#back-to-top").fadeOut()}),$("#back-to-top").click(()=>($("body,html").animate({scrollTop:0},800),!1))});const LocaleHelper=function(){const e=$('meta[name="prefer-datetime-locale"]'),t=0<e.length?e.attr("content").toLowerCase():$("html").attr("lang").substr(0,2),o="data-ts",a="data-df";return{locale:()=>t,attrTimestamp:()=>o,attrDateFormat:()=>a,getTimestamp:e=>Number(e.attr(o)),getDateFormat:e=>e.attr(a)}}();$(function(){$(".mode-toggle").click(e=>{const t=$(e.target);let o=t.prop("tagName")==="button".toUpperCase()?t:t.parent();o.blur(),flipMode()})});const ScrollHelper=function(){const e=$("body"),t="data-topbar-visible",o=$("#topbar-wrapper").outerHeight();let a=0,r=!1,l=!1;return{hideTopbar:()=>e.attr(t,!1),showTopbar:()=>e.attr(t,!0),addScrollUpTask:()=>{a+=1,r=r||!0},popScrollUpTask:()=>--a,hasScrollUpTask:()=>0<a,topbarLocked:()=>!0===r,unlockTopbar:()=>r=!1,getTopbarHeight:()=>o,orientationLocked:()=>!0===l,lockOrientation:()=>l=!0,unLockOrientation:()=>l=!1}}();$(function(){const e=$("#sidebar-trigger"),t=$("#search-trigger"),o=$("#search-cancel"),a=$("#main"),r=$("#topbar-title"),l=$("#search-wrapper"),n=$("#search-result-wrapper"),s=$("#search-results"),i=$("#search-input"),c=$("#search-hints"),d=function(){let e=0;return{block(){e=window.scrollY,$("html,body").scrollTop(0)},release(){$("html,body").scrollTop(e)},getOffset(){return e}}}(),p={on(){e.addClass("unloaded"),r.addClass("unloaded"),t.addClass("unloaded"),l.addClass("d-flex"),o.addClass("loaded")},off(){o.removeClass("loaded"),l.removeClass("d-flex"),e.removeClass("unloaded"),r.removeClass("unloaded"),t.removeClass("unloaded")}},u=function(){let e=!1;return{on(){e||(d.block(),n.removeClass("unloaded"),a.addClass("unloaded"),e=!0)},off(){e&&(s.empty(),c.hasClass("unloaded")&&c.removeClass("unloaded"),n.addClass("unloaded"),a.removeClass("unloaded"),d.release(),i.val(""),e=!1)},isVisible(){return e}}}();function f(){return o.hasClass("loaded")}t.click(function(){p.on(),u.on(),i.focus()}),o.click(function(){p.off(),u.off()}),i.focus(function(){l.addClass("input-focus")}),i.focusout(function(){l.removeClass("input-focus")}),i.on("input",()=>{""===i.val()?f()?c.removeClass("unloaded"):u.off():(u.on(),f()&&c.addClass("unloaded"))})}),$(function(){var e=function(){const e="sidebar-display";let t=!1;const o=$("body");return{toggle(){!1===t?o.attr(e,""):o.removeAttr(e),t=!t}}}();$("#sidebar-trigger").click(e.toggle),$("#mask").click(e.toggle)}),$(function(){$('[data-toggle="tooltip"]').tooltip()}),$(function(){const t=$("#search-input"),o=ScrollHelper.getTopbarHeight();let e,a=0;function r(){0!==$(window).scrollTop()&&(ScrollHelper.lockOrientation(),ScrollHelper.hideTopbar())}screen.orientation?screen.orientation.onchange=()=>{var e=screen.orientation.type;"landscape-primary"!==e&&"landscape-secondary"!==e||r()}:$(window).on("orientationchange",()=>{$(window).width()<$(window).height()&&r()}),$(window).scroll(()=>{e=e||!0}),setInterval(()=>{e&&(function(){var e=$(this).scrollTop();if(!(Math.abs(a-e)<=o)){if(e>a)ScrollHelper.hideTopbar(),t.is(":focus")&&t.blur();else if(e+$(window).height()<$(document).height()){if(ScrollHelper.hasScrollUpTask())return;ScrollHelper.topbarLocked()?ScrollHelper.unlockTopbar():ScrollHelper.orientationLocked()?ScrollHelper.unLockOrientation():ScrollHelper.showTopbar()}a=e}}(),e=!1)},250)}),$(function(){var t="div.post>h1:first-of-type";const o=$(t),n=$("#topbar-title");if(0!==o.length&&!o.hasClass("dynamic-title")&&!n.is(":hidden")){const s=n.text().trim();let a=o.text().trim(),r=!1,l=0;($("#page-category").length||$("#page-tag").length)&&/\s/.test(a)&&(a=a.replace(/[0-9]/g,"").trim()),o.offset().top<$(window).scrollTop()&&n.text(a);let e=new IntersectionObserver(e=>{var t,o;r?(t=$(window).scrollTop(),o=l<t,l=t,e=e[0],o?0===e.intersectionRatio&&n.text(a):1===e.intersectionRatio&&n.text(s)):r=!0},{rootMargin:"-48px 0px 0px 0px",threshold:[0,1]});e.observe(document.querySelector(t)),n.click(function(){$("body,html").animate({scrollTop:0},800)})}}),$(function(){dayjs.locale(LocaleHelper.locale()),dayjs.extend(window.dayjs_plugin_localizedFormat),$(`[${LocaleHelper.attrTimestamp()}]`).each(function(){const e=dayjs.unix(LocaleHelper.getTimestamp($(this)));var t=LocaleHelper.getDateFormat($(this)),t=e.format(t);$(this).text(t),$(this).removeAttr(LocaleHelper.attrTimestamp()),$(this).removeAttr(LocaleHelper.attrDateFormat())})});

assets/js/dist/pvreport.min.js

@@ -1,5 +1,5 @@
 /*!
- * Chirpy v5.0.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
+ * Chirpy v5.1.0 (https://github.com/cotes2020/jekyll-theme-chirpy/)
  * © 2019 Cotes Chung
  * MIT Licensed
  */

docs/README.zh-CN.md

@@ -1,245 +0,0 @@
-<div align="right">
-
-  [EN](https://github.com/cotes2020/jekyll-theme-chirpy#readme) / 中文
-
-</div>
-
-<div align="center">
-
-  # Chirpy Jekyll Theme
-
-  一款简约而强大、采用响应式设计的 Jekyll 主题，适合展示专业写作内容。
-
-  [![Gem Version](https://img.shields.io/gem/v/jekyll-theme-chirpy?color=brightgreen)](https://rubygems.org/gems/jekyll-theme-chirpy)
-  [![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://app.codacy.com/project/badge/Grade/4e556876a3c54d5e8f2d2857c4f43894)](https://www.codacy.com/gh/cotes2020/jekyll-theme-chirpy/dashboard?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=cotes2020/jekyll-theme-chirpy&amp;utm_campaign=Badge_Grade)
-  [![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)
-
-  [**线上体验 →**](https://cotes2020.github.io/chirpy-demo)
-
-  [![Devices Mockup](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/commons/devices-mockup.png)](https://cotes2020.github.io/chirpy-demo)
-
-</div>
-
-## 功能一览
-
-- 本地化外观语言
-- 可配置的主题颜色
-- 文章置顶
-- 文章最后修改日期
-- 文章目录
-- 自动推荐相关文章
-- 语法高亮
-- 二级目录
-- 数学表达式
-- Mermaid 图表
-- 搜索
-- Atom 订阅
-- Disqus 评论
-- Google 分析
-- GA 浏览报告（高级功能）
-- SEO 优化
-- 网站性能优化
-
-## 前提要求
-
-参考 [Jekyll Docs](https://jekyllrb.com/docs/installation/) 安装 `Ruby`，`RubyGems`，`Jekyll` 和 `Bundler`。
-
-## 安装
-
-### 创建新仓库
-
-有两种方式可以创建一个使用本主题的仓库：
-
-- [**使用 Chirpy Starter**](#使用-chirpy-starter) - 易于版本升级，隔离无关的主题项目文件，让您的仓库舒适清爽。
-- [**从 GitHub 上 Fork**](#从-github-上-fork) - 对个性化二次开发友好，但是难于升级。除非您决定魔改此款主题或者参与代码贡献，否则不推荐使用此方式。
-
-#### 使用 Chirpy Starter
-
-[使用 Chirpy Starter][use-starter] 来快速创建 Jekyll 站点，命名为 `<GH_USERNAME>.github.io`，其中 `GH_USERNAME` 是您的 GitHub username。
-
-#### 从 GitHub 上 Fork
-
-[Fork **Chirpy**](https://github.com/cotes2020/jekyll-theme-chirpy/fork) 并改名为 `<GH_USERNAME>.github.io`。友情提示：默认分支的代码处于开发状态，如果您想博客更加稳定，请切换到最新的 [Tag][latest-tag] 开始写作。
-
-接着执行文件初始化:
-
-```console
-$ bash tools/init.sh
-```
-
-> **注**：如果您不打算部署到 GitHub Pages， 在上述命令后附加参数选项 `--no-gh`。
-
-上述脚本将会:
-
-1. 从您的仓库中删除了:
-
-    - `.travis.yml`
-    - `_posts` 下的文件
-    - `docs` 目录
-
-2. 如果使用了参数 `--no-gh`，则会怒删文件夹 `.github`。否则，配置 GitHub Actions：把 `.github/workflows/pages-deploy.yml.hook` 的后缀 `.hook` 去除，然后删除 `.github` 里的其他目录和文件。
-
-3. 从 `.gitignore` 中删除 `Gemfile.lock`。
-
-4. 自动提交一个 Commit 以保存上述文件的更改。
-
-### 安装依赖：
-
-首次运行本项目，需要先安装依赖：
-
-```console
-$ bundle
-```
-
-## 使用
-
-### 配置文件
-
-根据个人需要去修改 `_config.yml` 的变量，大部分都有注释介绍用法。典型的几个选项是：
-
-- `url`
-- `avatar`
-- `timezone`
-- `lang`
-
-### 自定义样式
-
-如果您需要自定义样式， 拷贝主题的文件 `assets/css/style.scss` 到您站点的相同路径上，然后在该文件末尾添加样式。
-
-自 [`v4.1.0`][chirpy-4.1.0] 起，如果您想覆盖文件 `_sass/addon/variables.scss` 里定义的 SASS 变量的默认值，新建文件 `_sass/variables-hook.scss`，然后重写您需要的变量即可。
-
-### 本地运行
-
-发布之前，在本地预览:
-
-```terminal
-$ bundle exec jekyll s
-```
-
-或者用 Docker 运行:
-
-```terminal
-$ docker run -it --rm \
-    --volume="$PWD:/srv/jekyll" \
-    -p 4000:4000 jekyll/jekyll \
-    jekyll serve
-```
-
-稍候片刻，即可访问本地服务：_<http://localhost:4000>_
-
-### 部署
-
-部署开始前，把  `_config.yml` 的 `url` 改为 `https://<username>.github.io`（或者您的私有域名，如：`https://yourdomain.com`）。另外，如果您想使用 [Project 类型网站](https://help.github.com/en/github/working-with-github-pages/about-github-pages#types-of-github-pages-sites)，修改配置文件的 `baseurl` 为项目名称，以斜杠开头，如：`/project`。
-
-现在您可以选择下列其中一个方式去站点部署。
-
-#### 使用 GitHub Actions 部署
-
-由于安全原因，默认的 GitHub Pages 的构建强制加了 `safe`参数，这导致了我们不能使用插件去创建所需的附加页面。因此，我们可以使用 GitHub Actions 去构建站点，把站点文件存储在一个新分支上，再指定该分支作为 Pages 服务的源。
-
-快速检查 GitHub Actions 构建需要的文件:
-
-- 确保您的 Jekyll 站点存在文件 `.github/workflows/pages-deploy.yml`。没有的话，新建并填入「[示例 Workflow][workflow]」的内容，注意参数 `on.push.branches` 的值必须和您的仓库默认分支名相同。
-
-- 检查您的 Jekyll 站点是否有文件 `tools/deploy.sh`。没有的话， 从本仓库拷贝到您的 Jekyll 项目。
-
-- 再者，如果您已经把文件 `Gemfile.lock` 提交到了仓库里面，并且您运行本项目的操作系统不是 Linux，需要添加新的平台信息：
-
-  ```console
-  $ bundle lock --add-platform x86_64-linux
-  ```
-
-完成上述条目后，到 GitHub 把您的仓库命名为 `<GH-USERNAME>.github.io`，然后开始发布：
-
-1. 推送任意一个 commit 到 `origin/master` 以触发 GitHub Actions workflow。一旦 build 完毕并且成功，远端将会自动出现一个新分支 `gh-pages` 用来存储构建的站点文件。
-
-2. 回到 GitHub 上的仓库，选择标签 _Settings_ → 点击左侧导航栏的 _Pages_ → _GitHub Pages_ 选择分支 `gh-pages` 的 `/(root)` 作为「[发布源][pages-src]」:
-
-    ![gh-pages-sources](https://cdn.jsdelivr.net/gh/cotes2020/chirpy-images@f4e0354b674f65a53b8917f0f786ed2956898cc1/posts/20190809/gh-pages-sources.png)
-
-3. 按照 GitHub 指示的地址去访问您的网站。
-
-#### 手动构建部署
-
-在 GitHub 之外的平台，就没法享受 **GitHub Actions** 的便利了。因此您需要在本地构建站点，然后推送站点文件到服务器上。
-
-在项目根目录，运行:
-
-```console
-$ JEKYLL_ENV=production bundle exec jekyll b
-```
-
-或者通过 Docker 构建:
-
-```terminal
-$ docker run -it --rm \
-    --env JEKYLL_ENV=production \
-    --volume="$PWD:/srv/jekyll" \
-    jekyll/jekyll \
-    jekyll build
-```
-
-生成的静态文件将会在 `_site`， 把内部的文件上传到服务器即可。
-
-### 升级
-
-这取决于您如何使用这个 theme：
-
-- 如果您是使用 theme gem（`Gemfile` 会有 `gem "jekyll-theme-chirpy"`），编辑 `Gemfile` 并更新 them gem 的版本号，譬如：
-
-  ```diff
-  - gem "jekyll-theme-chirpy", "~> 3.2", ">= 3.2.1"
-  + gem "jekyll-theme-chirpy", "~> 3.3", ">= 3.3.0"
-  ```
-
-  接着执行以下命令：
-
-  ```console
-  $ bundle update jekyll-theme-chirpy
-  ```
-
-  随着 theme 版本的升级，运行站点的必要文件（详见 [Chirpy Starter][starter]）以及配置选项会出现变化，请参阅「[升级指南](https://github.com/cotes2020/jekyll-theme-chirpy/wiki/Upgrade-Guide)」的改动细节去保持您仓库中的相关文件同步到最新版本。
-
-- 如果您是以 fork 的方式使用（您站点的 `Gemfile` 会有 `gemspec`），那么合并上游 [最新的 tag][latest-tag] 到您的 Repo 以完成升级。期间很有可能会产生冲突 (conflicts)，请务必耐心谨慎地解决它们。
-
-## 文档
-
-若想要更多细节以及更佳的阅读体验，请参阅「[线上教程](https://cotes2020.github.io/chirpy-demo/categories/tutorial/)」。 与此同时，「[Wiki](https://github.com/cotes2020/jekyll-theme-chirpy/wiki)」也有一份教程的拷贝。请注意，Demo 网站和 Wiki 上的文档都是基于最新的发行版本，而 `master` 分支的功能往往领先于现有文档。
-
-## 参与贡献
-
-三人行必有我师，欢迎提报告 bug，帮助改进代码质量，或者提交新功能。具体操作规则请参考「[贡献指南](../.github/CONTRIBUTING.md)」，谢谢 🙏。
-
-## 鸣谢
-
-此款主题的开发主要基于 [Jekyll](https://jekyllrb.com/) 生态、[Bootstrap](https://getbootstrap.com/)、[Font Awesome](https://fontawesome.com/) 和其他一些出色的工具 (相关文件中可以找到这些工具的版权信息)。头像和图标的设计来自于 [Clipart Max](https://www.clipartmax.com/middle/m2i8b1m2K9Z5m2K9_ant-clipart-childrens-ant-cute/)。
-
-:tada: 感谢所有参与代码贡献的小伙伴，他们的 GayHub ID 在这个「[列表](https://github.com/cotes2020/jekyll-theme-chirpy/graphs/contributors)」。 另外，提交过 issues（或者未被合并 PR）的高富帅和白富美也不会被遗忘，他/她们帮助报告 bug、分享新点子或者启发了我写出更通俗易懂的文档。
-
-还有，感谢 [JetBrains][jb] 提供开源 License！
-
-## 赞助
-
-如果您喜欢此款主题或者它对您有帮助，请考虑打赏作者，您的支持将会极大地鼓励作者，并帮助作者更好地维护项目！
-
-[![Ko-fi](https://img.shields.io/badge/-请作者喝杯咖啡-ff5f5f?logo=ko-fi&logoColor=white)](https://ko-fi.com/coteschung)
-[![Wechat Pay](https://img.shields.io/badge/-微信打赏作者-brightgreen?logo=wechat&logoColor=white)][cn-donation]
-[![Alipay](https://img.shields.io/badge/-支付宝打赏作者-blue?logo=alipay&logoColor=white)][cn-donation]
-
-## 许可证书
-
-本项目开源，基于 [MIT](https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/LICENSE) 许可。
-
-[starter]: https://github.com/cotes2020/chirpy-starter
-[use-starter]: https://github.com/cotes2020/chirpy-starter/generate
-[workflow]: https://github.com/cotes2020/jekyll-theme-chirpy/blob/master/.github/workflows/pages-deploy.yml.hook
-[chirpy-4.1.0]: https://github.com/cotes2020/jekyll-theme-chirpy/releases/tag/v4.1.0
-[pages-src]: https://docs.github.com/en/github/working-with-github-pages/configuring-a-publishing-source-for-your-github-pages-site
-[latest-tag]: https://github.com/cotes2020/jekyll-theme-chirpy/tags
-
-<!-- ReadMe links -->
-
-[jb]: https://www.jetbrains.com/?from=jekyll-theme-chirpy
-[cn-donation]: https://cotes.gitee.io/alipay-wechat-donation/

gulpfile.js/tasks/js.js

@@ -11,7 +11,7 @@ const insert = require('gulp-insert');
 const fs = require('fs');
 
 const JS_SRC = '_javascript';
-const JS_DEST = `assets/js/dist/`;
+const JS_DEST = `assets/js/dist`;
 
 function concatJs(files, output) {
   return src(files)
@@ -66,17 +66,27 @@ const pageJs = () => {
       `${JS_SRC}/commons/*.js`,
       `${JS_SRC}/utils/checkbox.js`,
       `${JS_SRC}/utils/img-extra.js`,
-      `${JS_SRC}/utils/clipboard.js`
+      `${JS_SRC}/utils/clipboard.js`,
+      `${JS_SRC}/utils/smooth-scroll.js`
     ], 'page'
   );
 };
 
+const miscJs = () => {
+  return concatJs([
+      `${JS_SRC}/commons/*.js`,
+      `${JS_SRC}/utils/locale-datetime.js`
+    ], 'misc'
+  );
+};
+
 // GA pageviews report
 const pvreportJs = () => {
   return concatJs(`${JS_SRC}/utils/pageviews.js`, 'pvreport');
 };
 
-const buildJs = parallel(commonsJs, homeJs, postJs, categoriesJs, pageJs, pvreportJs);
+const buildJs = parallel(
+  commonsJs, homeJs, postJs, categoriesJs, pageJs, miscJs, pvreportJs);
 
 exports.build = series(buildJs, minifyJs);
 
@@ -85,8 +95,7 @@ exports.liveRebuild = () => {
 
   watch([
       `${ JS_SRC }/commons/*.js`,
-      `${ JS_SRC }/utils/*.js`,
+      `${ JS_SRC }/utils/*.js`
-      `${ JS_SRC }/lib/*.js`
     ],
     buildJs
   );

jekyll-theme-chirpy.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-theme-chirpy"
-  spec.version       = "5.0.0"
+  spec.version       = "5.1.0"
   spec.authors       = ["Cotes Chung"]
   spec.email         = ["cotes.chung@gmail.com"]
 

package.json

@@ -1,14 +1,7 @@
 {
   "name": "jekyll-theme-chirpy",
-  "version": "5.0.0",
+  "version": "5.1.0",
-  "description": "A minimal, sidebar, responsive web design Jekyll theme that focuses on text presentation.",
+  "description": "A minimal, responsive, and powerful Jekyll theme for presenting professional writing.",
-  "main": "index.js",
-  "directories": {
-    "doc": "docs"
-  },
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/cotes2020/jekyll-theme-chirpy.git"

tools/bump.sh

@@ -85,23 +85,22 @@ main() {
 
   echo "Input a version number (hint: latest version is ${_latest_tag:1})"
 
-  read _version
+  read -p "> " _version
 
-  if [[ $_version =~ ^[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]$ ]]; then
+  [[ $_version =~ ^[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]$ ]] ||
+    (
+      echo "Error: Illegal version number: '$_version'"
+      exit 1
+    )
 
   if git tag --list | egrep -q "^v$_version$"; then
     echo "Error: version '$_version' already exists"
-      exit -1
+    exit 1
   fi
 
   echo -e "Bump version to $_version\n"
   bump "$_version"
 
-  else
-
-    echo "Error: Illegal version number: '$_version'"
-  fi
-
 }
 
 main

tools/init.sh

@@ -28,9 +28,8 @@ check_status() {
 check_init() {
   local _has_inited=false
 
-  if [[ ! -d docs ]]; then
+  if [[ ! -d .github ]]; then # using option `--no-gh`
-    if [[ ! -d .github ]]; then
+    _has_inited=true
-      _has_inited=true # --no-gh
   else
     if [[ -f .github/workflows/$ACTIONS_WORKFLOW ]]; then
       # on BSD, the `wc` could contains blank
@@ -40,7 +39,6 @@ check_init() {
       fi
     fi
   fi
-  fi
 
   if $_has_inited; then
     echo "Already initialized."
@@ -80,7 +78,7 @@ init_files() {
 
   # remove the other fies
   rm -f .travis.yml
-  rm -rf _posts/* docs
+  rm -rf _posts/*
 
   # save changes
   git add -A

tools/release.sh

@@ -16,6 +16,20 @@ set -eu
 
 GEM_SPEC="jekyll-theme-chirpy.gemspec"
 
+opt_pre=false
+
+help() {
+  echo "A tool to release new version Chirpy gem"
+  echo
+  echo "Usage:"
+  echo
+  echo "   bash ./tools/release.sh [options]"
+  echo
+  echo "Options:"
+  echo "     -p, --preview            Enable preview mode, only pakcage, and will not modify the branches"
+  echo "     -h, --help               Print this information."
+}
+
 check() {
   if [[ -n $(git status . -s) ]]; then
     echo "Error: Commit unstaged files first, and then run this tool againt."
@@ -43,6 +57,8 @@ release() {
   _version="$(grep "spec.version" jekyll-theme-chirpy.gemspec | sed 's/.*= "//;s/".*//')" # X.Y.Z
   _release_branch="release/${_version%.*}"
 
+  if [[ $opt_pre = "false" ]]; then
+    # Modify the GitLab release branches
     if [[ -z $(git branch -v | grep "$_release_branch") ]]; then
       # create a new release branch
       git checkout -b "$_release_branch"
@@ -53,9 +69,10 @@ release() {
       git cherry-pick "$_last_commit" -m 1
     fi
 
-  # create new tag
+    # Create a new tag
     echo -e "Create tag v$_version\n"
     git tag "v$_version"
+  fi
 
   # build a gem package
   echo -e "Build the gem pakcage for v$_version\n"
@@ -70,4 +87,23 @@ main() {
   release
 }
 
+while (($#)); do
+  opt="$1"
+  case $opt in
+  -p | --preview)
+    opt_pre=true
+    shift
+    ;;
+  -h | --help)
+    help
+    exit 0
+    ;;
+  *)
+    # unknown option
+    help
+    exit 1
+    ;;
+  esac
+done
+
 main