Combine local JS.

’yui-compressor’ is no longer used.

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

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

assets/js/_commons/copy-link.js

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

assets/js/_commons/search-display.js

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

assets/js/_commons/sidebar.js

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+/**
+ * Expand or close the sidebar in mobile screens.
+ * v2.0
+ * https://github.com/cotes2020/jekyll-theme-chirpy
+ * © 2018-2019 Cotes Chung
+ * MIT License
+ */
+
+$(function() {
+
+  var sidebarUtil = (function() {
+    const ATTR_DISPLAY = "sidebar-display";
+    var isExpanded = false;
+    var body = $('body');
+
+    return {
+      toggle: function() {
+        if (isExpanded == false) {
+          body.attr(ATTR_DISPLAY, '');
+        } else {
+          body.removeAttr(ATTR_DISPLAY);
+        }
+
+        isExpanded = !isExpanded;
+      }
+    }
+
+  })();
+
+  $("#sidebar-trigger").click(sidebarUtil.toggle);
+
+  $('#mask').click(sidebarUtil.toggle);
+
+});

assets/js/_commons/topbar-switch.js

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

assets/js/_commons/topbar-title.js

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