Remove jQuery .attr from the Fomantic dropdowns (#30114)

- Switched from jQuery `attr` to plain javascript `getAttribute` and
`setAttribute`
- Tested the dropdowns and they work as before

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: Giteabot <teabot@gitea.io>

Author: yardenshoham

web_src/js/modules/fomantic/dropdown.js

@@ -21,12 +21,11 @@ function ariaDropdownFn(...args) {
   // it means that this call will reset the dropdown internal settings, then we need to re-delegate the callbacks.
   const needDelegate = (!args.length || typeof args[0] !== 'string');
   for (const el of this) {
-    const $dropdown = $(el);
     if (!el[ariaPatchKey]) {
-      attachInit($dropdown);
+      attachInit(el);
     }
     if (needDelegate) {
-      delegateOne($dropdown);
+      delegateOne($(el));
     }
   }
   return ret;
@@ -40,17 +39,23 @@ function updateMenuItem(dropdown, item) {
   item.setAttribute('tabindex', '-1');
   for (const el of item.querySelectorAll('a, input, button')) el.setAttribute('tabindex', '-1');
 }
-
-// make the label item and its "delete icon" has correct aria attributes
-function updateSelectionLabel($label) {
+/**
+ * make the label item and its "delete icon" have correct aria attributes
+ * @param {HTMLElement} label
+ */
+function updateSelectionLabel(label) {
   // the "label" is like this: "<a|div class="ui label" data-value="1">the-label-name <i|svg class="delete icon"/></a>"
-  if (!$label.attr('id')) $label.attr('id', generateAriaId());
-  $label.attr('tabindex', '-1');
-  $label.find('.delete.icon').attr({
-    'aria-hidden': 'false',
-    'aria-label': window.config.i18n.remove_label_str.replace('%s', $label.attr('data-value')),
-    'role': 'button',
-  });
+  if (!label.id) {
+    label.id = generateAriaId();
+  }
+  label.tabIndex = -1;
+
+  const deleteIcon = label.querySelector('.delete.icon');
+  if (deleteIcon) {
+    deleteIcon.setAttribute('aria-hidden', 'false');
+    deleteIcon.setAttribute('aria-label', window.config.i18n.remove_label_str.replace('%s', label.getAttribute('data-value')));
+    deleteIcon.setAttribute('role', 'button');
+  }
 }
 
 // delegate the dropdown's template functions and callback functions to add aria attributes.
@@ -86,43 +91,44 @@ function delegateOne($dropdown) {
   const dropdownOnLabelCreateOld = dropdownCall('setting', 'onLabelCreate');
   dropdownCall('setting', 'onLabelCreate', function(value, text) {
     const $label = dropdownOnLabelCreateOld.call(this, value, text);
-    updateSelectionLabel($label);
+    updateSelectionLabel($label[0]);
     return $label;
   });
 }
 
 // for static dropdown elements (generated by server-side template), prepare them with necessary aria attributes
-function attachStaticElements($dropdown, $focusable, $menu) {
-  const dropdown = $dropdown[0];
-
+function attachStaticElements(dropdown, focusable, menu) {
   // prepare static dropdown menu list popup
-  if (!$menu.attr('id')) $menu.attr('id', generateAriaId());
-  $menu.find('> .item').each((_, item) => updateMenuItem(dropdown, item));
+  if (!menu.id) {
+    menu.id = generateAriaId();
+  }
+
+  $(menu).find('> .item').each((_, item) => updateMenuItem(dropdown, item));
+
   // this role could only be changed after its content is ready, otherwise some browsers+readers (like Chrome+AppleVoice) crash
-  $menu.attr('role', dropdown[ariaPatchKey].listPopupRole);
+  menu.setAttribute('role', dropdown[ariaPatchKey].listPopupRole);
 
   // prepare selection label items
-  $dropdown.find('.ui.label').each((_, label) => updateSelectionLabel($(label)));
+  for (const label of dropdown.querySelectorAll('.ui.label')) {
+    updateSelectionLabel(label);
+  }
 
   // make the primary element (focusable) aria-friendly
-  $focusable.attr({
-    'role': $focusable.attr('role') ?? dropdown[ariaPatchKey].focusableRole,
-    'aria-haspopup': dropdown[ariaPatchKey].listPopupRole,
-    'aria-controls': $menu.attr('id'),
-    'aria-expanded': 'false',
-  });
+  focusable.setAttribute('role', focusable.getAttribute('role') ?? dropdown[ariaPatchKey].focusableRole);
+  focusable.setAttribute('aria-haspopup', dropdown[ariaPatchKey].listPopupRole);
+  focusable.setAttribute('aria-controls', menu.id);
+  focusable.setAttribute('aria-expanded', 'false');
 
   // use tooltip's content as aria-label if there is no aria-label
-  const tooltipContent = $dropdown.attr('data-tooltip-content');
-  if (tooltipContent && !$dropdown.attr('aria-label')) {
-    $dropdown.attr('aria-label', tooltipContent);
+  const tooltipContent = dropdown.getAttribute('data-tooltip-content');
+  if (tooltipContent && !dropdown.getAttribute('aria-label')) {
+    dropdown.setAttribute('aria-label', tooltipContent);
   }
 }
 
-function attachInit($dropdown) {
-  const dropdown = $dropdown[0];
+function attachInit(dropdown) {
   dropdown[ariaPatchKey] = {};
-  if ($dropdown.hasClass('custom')) return;
+  if (dropdown.classList.contains('custom')) return;
 
   // Dropdown has 2 different focusing behaviors
   // * with search input: the input is focused, and it works with aria-activedescendant pointing another sibling element.
@@ -139,64 +145,66 @@ function attachInit($dropdown) {
 
   // TODO: multiple selection is only partially supported. Check and test them one by one in the future.
 
-  const $textSearch = $dropdown.find('input.search').eq(0);
-  const $focusable = $textSearch.length ? $textSearch : $dropdown; // the primary element for focus, see comment above
-  if (!$focusable.length) return;
+  const textSearch = dropdown.querySelector('input.search');
+  const focusable = textSearch || dropdown; // the primary element for focus, see comment above
+  if (!focusable) return;
 
   // as a combobox, the input should not have autocomplete by default
-  if ($textSearch.length && !$textSearch.attr('autocomplete')) {
-    $textSearch.attr('autocomplete', 'off');
+  if (textSearch && !textSearch.getAttribute('autocomplete')) {
+    textSearch.setAttribute('autocomplete', 'off');
   }
 
-  let $menu = $dropdown.find('> .menu');
-  if (!$menu.length) {
+  let menu = $(dropdown).find('> .menu')[0];
+  if (!menu) {
     // some "multiple selection" dropdowns don't have a static menu element in HTML, we need to pre-create it to make it have correct aria attributes
-    $menu = $('<div class="menu"></div>').appendTo($dropdown);
+    menu = document.createElement('div');
+    menu.classList.add('menu');
+    dropdown.append(menu);
   }
 
   // There are 2 possible solutions about the role: combobox or menu.
   // The idea is that if there is an input, then it's a combobox, otherwise it's a menu.
   // Since #19861 we have prepared the "combobox" solution, but didn't get enough time to put it into practice and test before.
-  const isComboBox = $dropdown.find('input').length > 0;
+  const isComboBox = dropdown.querySelectorAll('input').length > 0;
 
   dropdown[ariaPatchKey].focusableRole = isComboBox ? 'combobox' : 'menu';
   dropdown[ariaPatchKey].listPopupRole = isComboBox ? 'listbox' : '';
   dropdown[ariaPatchKey].listItemRole = isComboBox ? 'option' : 'menuitem';
 
-  attachDomEvents($dropdown, $focusable, $menu);
-  attachStaticElements($dropdown, $focusable, $menu);
+  attachDomEvents(dropdown, focusable, menu);
+  attachStaticElements(dropdown, focusable, menu);
 }
 
-function attachDomEvents($dropdown, $focusable, $menu) {
-  const dropdown = $dropdown[0];
+function attachDomEvents(dropdown, focusable, menu) {
   // when showing, it has class: ".animating.in"
   // when hiding, it has class: ".visible.animating.out"
-  const isMenuVisible = () => ($menu.hasClass('visible') && !$menu.hasClass('out')) || $menu.hasClass('in');
+  const isMenuVisible = () => (menu.classList.contains('visible') && !menu.classList.contains('out')) || menu.classList.contains('in');
 
   // update aria attributes according to current active/selected item
   const refreshAriaActiveItem = () => {
     const menuVisible = isMenuVisible();
-    $focusable.attr('aria-expanded', menuVisible ? 'true' : 'false');
+    focusable.setAttribute('aria-expanded', menuVisible ? 'true' : 'false');
 
     // if there is an active item, use it (the user is navigating between items)
     // otherwise use the "selected" for combobox (for the last selected item)
-    const $active = $menu.find('> .item.active, > .item.selected');
+    const active = $(menu).find('> .item.active, > .item.selected')[0];
+    if (!active) return;
     // if the popup is visible and has an active/selected item, use its id as aria-activedescendant
     if (menuVisible) {
-      $focusable.attr('aria-activedescendant', $active.attr('id'));
+      focusable.setAttribute('aria-activedescendant', active.id);
     } else if (dropdown[ariaPatchKey].listPopupRole === 'menu') {
       // for menu, when the popup is hidden, no need to keep the aria-activedescendant, and clear the active/selected item
-      $focusable.removeAttr('aria-activedescendant');
-      $active.removeClass('active').removeClass('selected');
+      focusable.removeAttribute('aria-activedescendant');
+      active.classList.remove('active', 'selected');
     }
   };
 
-  $dropdown.on('keydown', (e) => {
+  dropdown.addEventListener('keydown', (e) => {
     // here it must use keydown event before dropdown's keyup handler, otherwise there is no Enter event in our keyup handler
     if (e.key === 'Enter') {
-      const dropdownCall = fomanticDropdownFn.bind($dropdown);
+      const dropdownCall = fomanticDropdownFn.bind($(dropdown));
       let $item = dropdownCall('get item', dropdownCall('get value'));
-      if (!$item) $item = $menu.find('> .item.selected'); // when dropdown filters items by input, there is no "value", so query the "selected" item
+      if (!$item) $item = $(menu).find('> .item.selected'); // when dropdown filters items by input, there is no "value", so query the "selected" item
       // if the selected item is clickable, then trigger the click event.
       // we can not click any item without check, because Fomantic code might also handle the Enter event. that would result in double click.
       if ($item && ($item[0].matches('a') || $item.hasClass('js-aria-clickable'))) $item[0].click();
@@ -209,7 +217,7 @@ function attachDomEvents($dropdown, $focusable, $menu) {
   // without the delay for hiding, the UI will be somewhat laggy and sometimes may get stuck in the animation.
   const deferredRefreshAriaActiveItem = (delay = 0) => { setTimeout(refreshAriaActiveItem, delay) };
   dropdown[ariaPatchKey].deferredRefreshAriaActiveItem = deferredRefreshAriaActiveItem;
-  $dropdown.on('keyup', (e) => { if (e.key.startsWith('Arrow')) deferredRefreshAriaActiveItem(); });
+  dropdown.addEventListener('keyup', (e) => { if (e.key.startsWith('Arrow')) deferredRefreshAriaActiveItem(); });
 
   // if the dropdown has been opened by focus, do not trigger the next click event again.
   // otherwise the dropdown will be closed immediately, especially on Android with TalkBack