perf: replace jQuery with Vanilla JS (#1681)

Also replaced `magnific-popup` with `GLightbox`

_data/origin/basic.yml

@@ -4,9 +4,6 @@ webfonts: /assets/lib/fonts/main.css
 
 # Libraries
 
-jquery:
-  js: /assets/lib/jquery/jquery.min.js
-
 bootstrap:
   css: /assets/lib/bootstrap/bootstrap.min.css
   js: /assets/lib/bootstrap/bootstrap.bundle.min.js
@@ -31,9 +28,9 @@ dayjs:
     relativeTime: /assets/lib/dayjs/plugin/relativeTime.min.js
     localizedFormat: /assets/lib/dayjs/plugin/localizedFormat.min.js
 
-magnific-popup:
+glightbox:
-  css: /assets/lib/magnific-popup/magnific-popup.css
+  css: /assets/lib/glightbox/glightbox.min.css
-  js: /assets/lib/magnific-popup/jquery.magnific-popup.min.js
+  js: /assets/lib/glightbox/glightbox.min.js
 
 lazy-polyfill:
   css: /assets/lib/loading-attribute-polyfill/loading-attribute-polyfill.min.css

_data/origin/cors.yml

@@ -17,9 +17,6 @@ webfonts: https://fonts.googleapis.com/css2?family=Lato:wght@300;400&family=Sour
 
 # Libraries
 
-jquery:
-  js: https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.min.js
-
 bootstrap:
   css: https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css
   js: https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/js/bootstrap.bundle.min.js
@@ -44,9 +41,9 @@ dayjs:
     relativeTime: https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/relativeTime.min.js
     localizedFormat: https://cdn.jsdelivr.net/npm/dayjs@1.11.10/plugin/localizedFormat.min.js
 
-magnific-popup:
+glightbox:
-  css: https://cdn.jsdelivr.net/npm/magnific-popup@1.1.0/dist/magnific-popup.min.css
+  css: https://cdn.jsdelivr.net/npm/glightbox@3.3.0/dist/css/glightbox.min.css
-  js: https://cdn.jsdelivr.net/npm/magnific-popup@1.1.0/dist/jquery.magnific-popup.min.js
+  js: https://cdn.jsdelivr.net/npm/glightbox@3.3.0/dist/js/glightbox.min.js
 
 lazy-polyfill:
   css: https://cdn.jsdelivr.net/npm/loading-attribute-polyfill@2.1.1/dist/loading-attribute-polyfill.min.css

_includes/comments/disqus.html

@@ -28,7 +28,7 @@
     { threshold: [0] }
   );
 
-  disqus_observer.observe(document.querySelector('#disqus_thread'));
+  disqus_observer.observe(document.getElementById('disqus_thread'));
 
   /* Auto switch theme */
   function reloadDisqus() {
@@ -44,7 +44,7 @@
     }
   }
 
-  if (document.querySelector('.mode-toggle')) {
+  if (document.getElementById('mode-toggle')) {
     window.addEventListener('message', reloadDisqus);
   }
 </script>

_includes/comments/giscus.html

@@ -2,7 +2,6 @@
 <script type="text/javascript">
   (function () {
     const origin = 'https://giscus.app';
-    const iframe = 'iframe.giscus-frame';
     const lightTheme = 'light';
     const darkTheme = 'dark_dimmed';
 
@@ -58,7 +57,7 @@
           }
         };
 
-        const giscus = document.querySelector(iframe).contentWindow;
+        const giscus = document.getElementsByClassName('giscus-frame')[0].contentWindow;
         giscus.postMessage({ giscus: message }, origin);
       }
     });

_includes/comments/utterances.html

@@ -10,7 +10,6 @@
 <script type="text/javascript">
   (function () {
     const origin = 'https://utteranc.es';
-    const iframe = 'iframe.utterances-frame';
     const lightTheme = 'github-light';
     const darkTheme = 'github-dark';
     let initTheme = lightTheme;
@@ -43,7 +42,7 @@
         theme: theme
       };
 
-      const utterances = document.querySelector(iframe).contentWindow;
+      const utterances = document.getElementsByClassName('utterances-frame')[0].contentWindow;
       utterances.postMessage(message, origin);
     });
   })();

_includes/head.html

@@ -97,8 +97,8 @@
   {% endif %}
 
   {% if page.layout == 'page' or page.layout == 'post' %}
-    <!-- Manific Popup -->
+    <!-- Image Popup -->
-    <link rel="stylesheet" href="{{ site.data.origin[type].magnific-popup.css | relative_url }}">
+    <link rel="stylesheet" href="{{ site.data.origin[type].glightbox.css | relative_url }}">
   {% endif %}
 
   <!-- JavaScript -->

_includes/js-selector.html

@@ -2,12 +2,9 @@
 
 <!-- commons -->
 
-{% assign urls = site.data.origin[type].jquery.js
+{%- capture urls -%}
-  | append: ','
+  {{ site.data.origin[type].bootstrap.js }},{{ site.data.origin[type].search.js }}
-  | append: site.data.origin[type].bootstrap.js
+{%- endcapture -%}
-  | append: ','
-  | append: site.data.origin[type].search.js
-%}
 
 <!-- layout specified -->
 
@@ -20,7 +17,7 @@
     <!-- image lazy-loading & popup & clipboard -->
     {% assign urls = urls
       | append: ','
-      | append: site.data.origin[type]['magnific-popup'].js
+      | append: site.data.origin[type].glightbox.js
       | append: ','
       | append: site.data.origin[type].clipboard.js
     %}

_includes/mermaid.html

@@ -1,6 +1,5 @@
 <!-- mermaid-js loader -->
 <script type="text/javascript">
-  (function () {
   function updateMermaid(event) {
     if (event.source === window && event.data && event.data.direction === ModeToggle.ID) {
       const mode = event.data.message;
@@ -13,10 +12,12 @@
       let config = { theme: expectedTheme };
 
       /* Re-render the SVG › <https://github.com/mermaid-js/mermaid/issues/311#issuecomment-332557344> */
-        $('.mermaid').each(function () {
+      const mermaidList = document.getElementsByClassName('mermaid');
-          let svgCode = $(this).prev().children().html();
+
-          $(this).removeAttr('data-processed');
+      [...mermaidList].forEach((elem) => {
-          $(this).html(svgCode);
+        const svgCode = elem.previousSibling.children.item(0).innerHTML;
+        elem.innerHTML = svgCode;
+        elem.removeAttribute('data-processed');
       });
 
       mermaid.initialize(config);
@@ -24,6 +25,7 @@
     }
   }
 
+  (function () {
     let initTheme = 'default';
     const html = document.documentElement;
 
@@ -35,11 +37,12 @@
     }
 
     let mermaidConf = {
-      theme: initTheme /* <default|dark|forest|neutral> */
+      theme: initTheme /* <default | dark | forest | neutral> */
     };
 
     /* Create mermaid tag */
-    document.querySelectorAll('pre>code.language-mermaid').forEach((elem) => {
+    const basicList = document.getElementsByClassName('language-mermaid');
+    [...basicList].forEach((elem) => {
       const svgCode = elem.textContent;
       const backup = elem.parentElement;
       backup.classList.add('unloaded');
@@ -52,7 +55,6 @@
     });
 
     mermaid.initialize(mermaidConf);
-
     window.addEventListener('message', updateMermaid);
   })();
 </script>

_includes/sidebar.html

@@ -44,7 +44,7 @@
 
   <div class="sidebar-bottom d-flex flex-wrap  align-items-center w-100">
     {% unless site.theme_mode %}
-      <button type="button" class="mode-toggle btn" aria-label="Switch Mode">
+      <button type="button" class="btn" aria-label="Switch Mode" id="mode-toggle">
         <i class="fas fa-adjust"></i>
       </button>
 

_includes/topbar.html

@@ -59,7 +59,7 @@
       <i class="fas fa-search fa-fw"></i>
     </button>
 
-    <search class="align-items-center ms-3 ms-lg-0">
+    <search id="search" class="align-items-center ms-3 ms-lg-0">
       <i class="fas fa-search fa-fw"></i>
       <input
         class="form-control"

_javascript/modules/components/back-to-top.js

@@ -3,18 +3,17 @@
  */
 
 export function back2top() {
-  const $window = $(window);
+  const btn = document.getElementById('back-to-top');
-  const $btn = $('#back-to-top');
 
-  $window.on('scroll', () => {
+  window.addEventListener('scroll', () => {
-    if ($window.scrollTop() > 50) {
+    if (window.scrollY > 50) {
-      $btn.fadeIn();
+      btn.classList.add('show');
     } else {
-      $btn.fadeOut();
+      btn.classList.remove('show');
     }
   });
 
-  $btn.on('click', () => {
+  btn.addEventListener('click', () => {
-    $window.scrollTop(0);
+    window.scrollTo({ top: 0 });
   });
 }

_javascript/modules/components/category-collapse.js

@@ -3,34 +3,31 @@
  */
 const childPrefix = 'l_';
 const parentPrefix = 'h_';
-const collapse = $('.collapse');
+const children = document.getElementsByClassName('collapse');
 
 export function categoryCollapse() {
-  /* close up top-category */
+  [...children].forEach((elem) => {
-  collapse.on('hide.bs.collapse', function () {
+    const id = parentPrefix + elem.id.substring(childPrefix.length);
-    /* Bootstrap collapse events. */ const parentId =
+    const parent = document.getElementById(id);
-      parentPrefix + $(this).attr('id').substring(childPrefix.length);
+
-    if (parentId) {
+    // collapse sub-categories
-      $(`#${parentId} .far.fa-folder-open`).attr(
+    elem.addEventListener('hide.bs.collapse', () => {
-        'class',
+      if (parent) {
-        'far fa-folder fa-fw'
+        parent.querySelector('.far.fa-folder-open').className =
-      );
+          'far fa-folder fa-fw';
-      $(`#${parentId} i.fas`).addClass('rotate');
+        parent.querySelector('.fas.fa-angle-down').classList.add('rotate');
-      $(`#${parentId}`).removeClass('hide-border-bottom');
+        parent.classList.remove('hide-border-bottom');
       }
     });
 
-  /* expand the top category */
+    // expand sub-categories
-  collapse.on('show.bs.collapse', function () {
+    elem.addEventListener('show.bs.collapse', () => {
-    const parentId =
+      if (parent) {
-      parentPrefix + $(this).attr('id').substring(childPrefix.length);
+        parent.querySelector('.far.fa-folder').className =
-    if (parentId) {
+          'far fa-folder-open fa-fw';
-      $(`#${parentId} .far.fa-folder`).attr(
+        parent.querySelector('.fas.fa-angle-down').classList.remove('rotate');
-        'class',
+        parent.classList.add('hide-border-bottom');
-        'far fa-folder-open fa-fw'
-      );
-      $(`#${parentId} i.fas`).removeClass('rotate');
-      $(`#${parentId}`).addClass('hide-border-bottom');
       }
     });
+  });
 }

_javascript/modules/components/clipboard.js

@@ -7,69 +7,70 @@
  */
 
 const clipboardSelector = '.code-header>button';
+
+const ICON_DEFAULT = 'far fa-clipboard';
 const ICON_SUCCESS = 'fas fa-check';
+
 const ATTR_TIMEOUT = 'timeout';
 const ATTR_TITLE_SUCCEED = 'data-title-succeed';
 const ATTR_TITLE_ORIGIN = 'data-bs-original-title';
 const TIMEOUT = 2000; // in milliseconds
 
 function isLocked(node) {
-  if ($(node)[0].hasAttribute(ATTR_TIMEOUT)) {
+  if (node.hasAttribute(ATTR_TIMEOUT)) {
-    let timeout = $(node).attr(ATTR_TIMEOUT);
+    let timeout = node.getAttribute(ATTR_TIMEOUT);
     if (Number(timeout) > Date.now()) {
       return true;
     }
   }
+
   return false;
 }
 
 function lock(node) {
-  $(node).attr(ATTR_TIMEOUT, Date.now() + TIMEOUT);
+  node.setAttribute(ATTR_TIMEOUT, Date.now() + TIMEOUT);
 }
 
 function unlock(node) {
-  $(node).removeAttr(ATTR_TIMEOUT);
+  node.removeAttribute(ATTR_TIMEOUT);
 }
 
-function getIcon(btn) {
-  let iconNode = $(btn).children();
-  return iconNode.attr('class');
-}
-
-const ICON_DEFAULT = getIcon(clipboardSelector);
-
 function showTooltip(btn) {
-  const succeedTitle = $(btn).attr(ATTR_TITLE_SUCCEED);
+  const succeedTitle = btn.getAttribute(ATTR_TITLE_SUCCEED);
-  $(btn).attr(ATTR_TITLE_ORIGIN, succeedTitle).tooltip('show');
+  btn.setAttribute(ATTR_TITLE_ORIGIN, succeedTitle);
+  bootstrap.Tooltip.getInstance(btn).show();
 }
 
 function hideTooltip(btn) {
-  $(btn).tooltip('hide').removeAttr(ATTR_TITLE_ORIGIN);
+  bootstrap.Tooltip.getInstance(btn).hide();
+  btn.removeAttribute(ATTR_TITLE_ORIGIN);
 }
 
 function setSuccessIcon(btn) {
-  let btnNode = $(btn);
+  const icon = btn.children[0];
-  let iconNode = btnNode.children();
+  icon.setAttribute('class', ICON_SUCCESS);
-  iconNode.attr('class', ICON_SUCCESS);
 }
 
 function resumeIcon(btn) {
-  let btnNode = $(btn);
+  const icon = btn.children[0];
-  let iconNode = btnNode.children();
+  icon.setAttribute('class', ICON_DEFAULT);
-  iconNode.attr('class', ICON_DEFAULT);
 }
 
 export function initClipboard() {
+  const clipboardList = document.querySelectorAll(clipboardSelector);
+
+  if (clipboardList.length === 0) {
+    return;
+  }
+
   // Initial the clipboard.js object
-  if ($(clipboardSelector).length) {
   const clipboard = new ClipboardJS(clipboardSelector, {
-      target(trigger) {
+    target: (trigger) => {
-        let codeBlock = trigger.parentNode.nextElementSibling;
+      const codeBlock = trigger.parentNode.nextElementSibling;
       return codeBlock.querySelector('code .rouge-code');
     }
   });
 
-    const clipboardList = document.querySelectorAll(clipboardSelector);
   [...clipboardList].map(
     (elem) =>
       new bootstrap.Tooltip(elem, {
@@ -78,9 +79,10 @@ export function initClipboard() {
   );
 
   clipboard.on('success', (e) => {
+    const trigger = e.trigger;
+
     e.clearSelection();
 
-      const trigger = e.trigger;
     if (isLocked(trigger)) {
       return;
     }
@@ -95,14 +97,13 @@ export function initClipboard() {
       unlock(trigger);
     }, TIMEOUT);
   });
-  }
 
   /* --- Post link sharing --- */
 
-  const btnCopyLink = $('#copy-link');
+  const btnCopyLink = document.getElementById('copy-link');
 
-  btnCopyLink.on('click', (e) => {
+  btnCopyLink.addEventListener('click', (e) => {
-    let target = $(e.target);
+    const target = e.target;
 
     if (isLocked(target)) {
       return;
@@ -110,21 +111,23 @@ export function initClipboard() {
 
     // Copy URL to clipboard
     navigator.clipboard.writeText(window.location.href).then(() => {
-      const defaultTitle = target.attr(ATTR_TITLE_ORIGIN);
+      const defaultTitle = target.getAttribute(ATTR_TITLE_ORIGIN);
-      const succeedTitle = target.attr(ATTR_TITLE_SUCCEED);
+      const succeedTitle = target.getAttribute(ATTR_TITLE_SUCCEED);
+
       // Switch tooltip title
-      target.attr(ATTR_TITLE_ORIGIN, succeedTitle).tooltip('show');
+      target.setAttribute(ATTR_TITLE_ORIGIN, succeedTitle);
+      bootstrap.Tooltip.getInstance(target).show();
+
       lock(target);
 
       setTimeout(() => {
-        target.attr(ATTR_TITLE_ORIGIN, defaultTitle);
+        target.setAttribute(ATTR_TITLE_ORIGIN, defaultTitle);
         unlock(target);
       }, TIMEOUT);
     });
   });
 
-  btnCopyLink.on('mouseleave', function (e) {
+  btnCopyLink.addEventListener('mouseleave', (e) => {
-    const target = $(e.target);
+    bootstrap.Tooltip.getInstance(e.target).hide();
-    target.tooltip('hide');
   });
 }

_javascript/modules/components/img-loading.js

@@ -11,7 +11,7 @@ const cover = {
 };
 
 function removeCover(clzss) {
-  $(this).parent().removeClass(clzss);
+  this.parentElement.classList.remove(clzss);
 }
 
 function handleImage() {
@@ -30,32 +30,38 @@ function handleImage() {
  * Switches the LQIP with the real image URL.
  */
 function switchLQIP() {
-  const $img = $(this);
+  const src = this.getAttribute(ATTR_DATA_SRC);
-  const src = $img.attr(ATTR_DATA_SRC);
+  this.setAttribute('src', encodeURI(src));
-
+  this.removeAttribute(ATTR_DATA_SRC);
-  $img.attr('src', encodeURI(src));
-  $img.removeAttr(ATTR_DATA_SRC);
 }
 
 export function loadImg() {
-  const $images = $('article img');
+  const images = document.querySelectorAll('article img');
 
-  if ($images.length) {
+  if (images.length === 0) {
-    $images.on('load', handleImage);
+    return;
   }
 
+  images.forEach((img) => {
+    img.addEventListener('load', handleImage);
+  });
+
   // Images loaded from the browser cache do not trigger the 'load' event
-  $('article img[loading="lazy"]').each(function () {
+  document.querySelectorAll('article img[loading="lazy"]').forEach((img) => {
-    if (this.complete) {
+    if (img.complete) {
-      removeCover.call(this, cover.SHIMMER);
+      removeCover.call(img, cover.SHIMMER);
     }
   });
 
   // LQIPs set by the data URI or WebP will not trigger the 'load' event,
   // so manually convert the URI to the URL of a high-resolution image.
-  const $lqips = $(`article img[${ATTR_DATA_LQIP}="true"]`);
+  const lqips = document.querySelectorAll(
+    `article img[${ATTR_DATA_LQIP}="true"]`
+  );
 
-  if ($lqips.length) {
+  if (lqips.length) {
-    $lqips.each(switchLQIP);
+    lqips.forEach((lqip) => {
+      switchLQIP.call(lqip);
+    });
   }
 }

_javascript/modules/components/img-popup.js

@@ -1,22 +1,15 @@
 /**
  * Set up image popup
  *
- * See: https://github.com/dimsemenov/Magnific-Popup
+ * Dependencies: https://github.com/biati-digital/glightbox
  */
 
+const IMG_CLASS = 'popup';
+
 export function imgPopup() {
-  if ($('.popup') <= 0) {
+  if (document.getElementsByClassName(IMG_CLASS).length === 0) {
     return;
   }
 
-  $('.popup').magnificPopup({
+  GLightbox({ selector: `.${IMG_CLASS}` });
-    type: 'image',
-    closeOnContentClick: true,
-    showCloseBtn: false,
-    zoom: {
-      enabled: true,
-      duration: 300,
-      easing: 'ease-in-out'
-    }
-  });
 }

_javascript/modules/components/locale-datetime.js

@@ -15,15 +15,15 @@ class LocaleHelper {
   }
 
   static get locale() {
-    return $('html').attr('lang').substring(0, 2);
+    return document.documentElement.getAttribute('lang').substring(0, 2);
   }
 
   static getTimestamp(elem) {
-    return Number(elem.attr(LocaleHelper.attrTimestamp)); // unix timestamp
+    return Number(elem.getAttribute(this.attrTimestamp)); // unix timestamp
   }
 
   static getDateFormat(elem) {
-    return elem.attr(LocaleHelper.attrDateFormat);
+    return elem.getAttribute(this.attrDateFormat);
   }
 }
 
@@ -31,21 +31,23 @@ export function initLocaleDatetime() {
   dayjs.locale(LocaleHelper.locale);
   dayjs.extend(window.dayjs_plugin_localizedFormat);
 
-  $(`[${LocaleHelper.attrTimestamp}]`).each(function () {
+  document
-    const date = dayjs.unix(LocaleHelper.getTimestamp($(this)));
+    .querySelectorAll(`[${LocaleHelper.attrTimestamp}]`)
-    const text = date.format(LocaleHelper.getDateFormat($(this)));
+    .forEach((elem) => {
-    $(this).text(text);
+      const date = dayjs.unix(LocaleHelper.getTimestamp(elem));
-    $(this).removeAttr(LocaleHelper.attrTimestamp);
+      const text = date.format(LocaleHelper.getDateFormat(elem));
-    $(this).removeAttr(LocaleHelper.attrDateFormat);
+      elem.textContent = text;
+      elem.removeAttribute(LocaleHelper.attrTimestamp);
+      elem.removeAttribute(LocaleHelper.attrDateFormat);
 
       // setup tooltips
-    const tooltip = $(this).attr('data-bs-toggle');
+      if (
-    if (typeof tooltip === 'undefined' || tooltip !== 'tooltip') {
+        elem.hasAttribute('data-bs-toggle') &&
-      return;
+        elem.getAttribute('data-bs-toggle') === 'tooltip'
+      ) {
+        // see: https://day.js.org/docs/en/display/format#list-of-localized-formats
+        const tooltipText = date.format('llll');
+        elem.setAttribute('data-bs-title', tooltipText);
       }
-
-    const tooltipText = date.format('llll'); // see: https://day.js.org/docs/en/display/format#list-of-localized-formats
-    $(this).attr('data-bs-title', tooltipText);
-    new bootstrap.Tooltip($(this));
     });
 }

_javascript/modules/components/mode-watcher.js

@@ -1,21 +1,14 @@
 /**
  * Add listener for theme mode toggle
  */
-const $toggleElem = $('.mode-toggle');
+const toggle = document.getElementById('mode-toggle');
 
 export function modeWatcher() {
-  if ($toggleElem.length === 0) {
+  if (!toggle) {
     return;
   }
 
-  $toggleElem.off().on('click', (e) => {
+  toggle.addEventListener('click', () => {
-    const $target = $(e.target);
+    modeToggle.flipMode();
-    let $btn =
-      $target.prop('tagName') === 'button'.toUpperCase()
-        ? $target
-        : $target.parent();
-
-    modeToggle.flipMode(); // modeToggle: `_includes/mode-toggle.html`
-    $btn.trigger('blur'); // remove the clicking outline
   });
 }

_javascript/modules/components/search-display.js

@@ -1,121 +1,109 @@
 /**
  * This script make #search-result-wrapper switch to unloaded or shown automatically.
  */
-const $btnSbTrigger = $('#sidebar-trigger');
-const $btnSearchTrigger = $('#search-trigger');
-const $btnCancel = $('#search-cancel');
-const $content = $('#main-wrapper>.container>.row');
-const $topbarTitle = $('#topbar-title');
-const $search = $('search');
-const $resultWrapper = $('#search-result-wrapper');
-const $results = $('#search-results');
-const $input = $('#search-input');
-const $hints = $('#search-hints');
-const $viewport = $('html,body');
 
-// class names
+const btnSbTrigger = document.getElementById('sidebar-trigger');
-const C_LOADED = 'loaded';
+const btnSearchTrigger = document.getElementById('search-trigger');
-const C_UNLOADED = 'unloaded';
+const btnCancel = document.getElementById('search-cancel');
-const C_FOCUS = 'input-focus';
+const content = document.querySelectorAll('#main-wrapper>.container>.row');
-const C_FLEX = 'd-flex';
+const topbarTitle = document.getElementById('topbar-title');
+const search = document.getElementById('search');
+const resultWrapper = document.getElementById('search-result-wrapper');
+const results = document.getElementById('search-results');
+const input = document.getElementById('search-input');
+const hints = document.getElementById('search-hints');
 
-class ScrollBlocker {
+// CSS class names
-  static offset = 0;
+const LOADED = 'loaded';
-  static resultVisible = false;
+const UNLOADED = 'unloaded';
+const FOCUS = 'input-focus';
+const FLEX = 'd-flex';
 
-  static on() {
+/* Actions in mobile screens (Sidebar hidden) */
-    ScrollBlocker.offset = window.scrollY;
-    $viewport.scrollTop(0);
-  }
-
-  static off() {
-    $viewport.scrollTop(ScrollBlocker.offset);
-  }
-}
-
-/*--- Actions in mobile screens (Sidebar hidden) ---*/
 class MobileSearchBar {
   static on() {
-    $btnSbTrigger.addClass(C_UNLOADED);
+    btnSbTrigger.classList.add(UNLOADED);
-    $topbarTitle.addClass(C_UNLOADED);
+    topbarTitle.classList.add(UNLOADED);
-    $btnSearchTrigger.addClass(C_UNLOADED);
+    btnSearchTrigger.classList.add(UNLOADED);
-    $search.addClass(C_FLEX);
+    search.classList.add(FLEX);
-    $btnCancel.addClass(C_LOADED);
+    btnCancel.classList.add(LOADED);
   }
 
   static off() {
-    $btnCancel.removeClass(C_LOADED);
+    btnCancel.classList.remove(LOADED);
-    $search.removeClass(C_FLEX);
+    search.classList.remove(FLEX);
-    $btnSbTrigger.removeClass(C_UNLOADED);
+    btnSbTrigger.classList.remove(UNLOADED);
-    $topbarTitle.removeClass(C_UNLOADED);
+    topbarTitle.classList.remove(UNLOADED);
-    $btnSearchTrigger.removeClass(C_UNLOADED);
+    btnSearchTrigger.classList.remove(UNLOADED);
   }
 }
 
 class ResultSwitch {
+  static resultVisible = false;
+
   static on() {
-    if (!ScrollBlocker.resultVisible) {
+    if (!this.resultVisible) {
-      // the block method must be called before $(#main-wrapper>.container) unloaded.
+      resultWrapper.classList.remove(UNLOADED);
-      ScrollBlocker.on();
+      content.forEach((el) => {
-      $resultWrapper.removeClass(C_UNLOADED);
+        el.classList.add(UNLOADED);
-      $content.addClass(C_UNLOADED);
+      });
-      ScrollBlocker.resultVisible = true;
+      this.resultVisible = true;
     }
   }
 
   static off() {
-    if (ScrollBlocker.resultVisible) {
+    if (this.resultVisible) {
-      $results.empty();
+      results.innerHTML = '';
-      if ($hints.hasClass(C_UNLOADED)) {
+
-        $hints.removeClass(C_UNLOADED);
+      if (hints.classList.contains(UNLOADED)) {
+        hints.classList.remove(UNLOADED);
       }
-      $resultWrapper.addClass(C_UNLOADED);
-      $content.removeClass(C_UNLOADED);
 
-      // now the release method must be called after $(#main-wrapper>.container) display
+      resultWrapper.classList.add(UNLOADED);
-      ScrollBlocker.off();
+      content.forEach((el) => {
-
+        el.classList.remove(UNLOADED);
-      $input.val('');
+      });
-      ScrollBlocker.resultVisible = false;
+      input.textContent = '';
+      this.resultVisible = false;
     }
   }
 }
 
 function isMobileView() {
-  return $btnCancel.hasClass(C_LOADED);
+  return btnCancel.classList.contains(LOADED);
 }
 
 export function displaySearch() {
-  $btnSearchTrigger.on('click', function () {
+  btnSearchTrigger.addEventListener('click', () => {
     MobileSearchBar.on();
     ResultSwitch.on();
-    $input.trigger('focus');
+    input.focus();
   });
 
-  $btnCancel.on('click', function () {
+  btnCancel.addEventListener('click', () => {
     MobileSearchBar.off();
     ResultSwitch.off();
   });
 
-  $input.on('focus', function () {
+  input.addEventListener('focus', () => {
-    $search.addClass(C_FOCUS);
+    search.classList.add(FOCUS);
   });
 
-  $input.on('focusout', function () {
+  input.addEventListener('focusout', () => {
-    $search.removeClass(C_FOCUS);
+    search.classList.remove(FOCUS);
   });
 
-  $input.on('input', () => {
+  input.addEventListener('input', () => {
-    if ($input.val() === '') {
+    if (input.value === '') {
       if (isMobileView()) {
-        $hints.removeClass(C_UNLOADED);
+        hints.classList.remove(UNLOADED);
       } else {
         ResultSwitch.off();
       }
     } else {
       ResultSwitch.on();
       if (isMobileView()) {
-        $hints.addClass(C_UNLOADED);
+        hints.classList.add(UNLOADED);
       }
     }
   });

_javascript/modules/components/sidebar.js

@@ -2,7 +2,6 @@
  * Expand or close the sidebar in mobile screens.
  */
 
-const $body = $('body');
 const ATTR_DISPLAY = 'sidebar-display';
 
 class SidebarUtil {
@@ -10,9 +9,9 @@ class SidebarUtil {
 
   static toggle() {
     if (SidebarUtil.isExpanded === false) {
-      $body.attr(ATTR_DISPLAY, '');
+      document.body.setAttribute(ATTR_DISPLAY, '');
     } else {
-      $body.removeAttr(ATTR_DISPLAY);
+      document.body.removeAttribute(ATTR_DISPLAY);
     }
 
     SidebarUtil.isExpanded = !SidebarUtil.isExpanded;
@@ -20,6 +19,9 @@ class SidebarUtil {
 }
 
 export function sidebarExpand() {
-  $('#sidebar-trigger').on('click', SidebarUtil.toggle);
+  document
-  $('#mask').on('click', SidebarUtil.toggle);
+    .getElementById('sidebar-trigger')
+    .addEventListener('click', SidebarUtil.toggle);
+
+  document.getElementById('mask').addEventListener('click', SidebarUtil.toggle);
 }

_sass/addon/commons.scss

@@ -672,18 +672,6 @@ main {
 
 /* --- Overriding --- */
 
-/* magnific-popup */
-
-figure .mfp-title {
-  text-align: center;
-  padding-right: 0;
-  margin-top: 0.5rem;
-}
-
-.mfp-img {
-  transition: none;
-}
-
 /* mermaid */
 .mermaid {
   text-align: center;
@@ -876,7 +864,7 @@ $btn-mb: 0.5rem;
       line-height: $btn-size;
     }
 
-    .mode-toggle {
+    #mode-toggle {
       padding: 0;
       border: 0;
 
@@ -1158,7 +1146,8 @@ search {
 /* --- button back-to-top --- */
 
 #back-to-top {
-  display: none;
+  visibility: hidden;
+  opacity: 0;
   z-index: 1;
   cursor: pointer;
   position: fixed;
@@ -1171,8 +1160,7 @@ search {
   height: $back2top-size;
   border-radius: 50%;
   border: 1px solid var(--btn-backtotop-border-color);
-  transition: transform 0.2s ease-out;
+  transition: opacity 0.5s ease-in-out, transform 0.2s ease-out;
-  -webkit-transition: transform 0.2s ease-out;
 
   &:hover {
     transform: translate3d(0, -5px, 0);
@@ -1184,6 +1172,11 @@ search {
     position: relative;
     bottom: 2px;
   }
+
+  &.show {
+    opacity: 1;
+    visibility: visible;
+  }
 }
 
 #notification {

assets/js/pwa/app.js

@@ -8,30 +8,32 @@ if ('serviceWorker' in navigator) {
 
   if (isEnabled) {
     const swUrl = '{{ '/sw.min.js' | relative_url }}';
-    const $notification = $('#notification');
+    const notification = document.getElementById('notification');
-    const $btnRefresh = $('#notification .toast-body>button');
+    const btnRefresh = notification.querySelector('.toast-body>button');
+    const popupWindow = bootstrap.Toast.getOrCreateInstance(notification);
 
     navigator.serviceWorker.register(swUrl).then((registration) => {
       {% comment %}In case the user ignores the notification{% endcomment %}
       if (registration.waiting) {
-        $notification.toast('show');
+        popupWindow.show();
       }
 
       registration.addEventListener('updatefound', () => {
         registration.installing.addEventListener('statechange', () => {
           if (registration.waiting) {
             if (navigator.serviceWorker.controller) {
-              $notification.toast('show');
+              popupWindow.show();
             }
           }
         });
       });
 
-      $btnRefresh.on('click', () => {
+      btnRefresh.addEventListener('click', () => {
         if (registration.waiting) {
           registration.waiting.postMessage('SKIP_WAITING');
         }
-        $notification.toast('hide');
+
+        popupWindow.hide();
       });
     });
 

assets/lib

@@ -1 +1 @@
-Subproject commit 7bc0d86b6af83d7acfc63db50f29a5975cec2513
+Subproject commit 29d7021f45317d02df9a3297d3c52a30bd4ae795