Remove jQuery `.attr` from the ComboMarkdownEditor (#30051)

- Switched from jQuery `attr` to plain javascript `getAttribute` and
`setAttribute`
- Tested the markdown editor and it works as before

Signed-off-by: Yarden Shoham <git@yardenshoham.com>

web_src/js/features/comp/ComboMarkdownEditor.js

@@ -132,34 +132,33 @@ class ComboMarkdownEditor {
 
   setupTab() {
     const $container = $(this.container);
-    const $tabMenu = $container.find('.tabular.menu');
-    const $tabs = $tabMenu.find('> .item');
+    const tabs = $container[0].querySelectorAll('.tabular.menu > .item');
 
     // Fomantic Tab requires the "data-tab" to be globally unique.
     // So here it uses our defined "data-tab-for" and "data-tab-panel" to generate the "data-tab" attribute for Fomantic.
-    const $tabEditor = $tabs.filter(`.item[data-tab-for="markdown-writer"]`);
-    const $tabPreviewer = $tabs.filter(`.item[data-tab-for="markdown-previewer"]`);
-    $tabEditor.attr('data-tab', `markdown-writer-${elementIdCounter}`);
-    $tabPreviewer.attr('data-tab', `markdown-previewer-${elementIdCounter}`);
-    const $panelEditor = $container.find('.ui.tab[data-tab-panel="markdown-writer"]');
-    const $panelPreviewer = $container.find('.ui.tab[data-tab-panel="markdown-previewer"]');
-    $panelEditor.attr('data-tab', `markdown-writer-${elementIdCounter}`);
-    $panelPreviewer.attr('data-tab', `markdown-previewer-${elementIdCounter}`);
+    const tabEditor = Array.from(tabs).find((tab) => tab.getAttribute('data-tab-for') === 'markdown-writer');
+    const tabPreviewer = Array.from(tabs).find((tab) => tab.getAttribute('data-tab-for') === 'markdown-previewer');
+    tabEditor.setAttribute('data-tab', `markdown-writer-${elementIdCounter}`);
+    tabPreviewer.setAttribute('data-tab', `markdown-previewer-${elementIdCounter}`);
+    const panelEditor = $container[0].querySelector('.ui.tab[data-tab-panel="markdown-writer"]');
+    const panelPreviewer = $container[0].querySelector('.ui.tab[data-tab-panel="markdown-previewer"]');
+    panelEditor.setAttribute('data-tab', `markdown-writer-${elementIdCounter}`);
+    panelPreviewer.setAttribute('data-tab', `markdown-previewer-${elementIdCounter}`);
     elementIdCounter++;
 
-    $tabEditor[0].addEventListener('click', () => {
+    tabEditor.addEventListener('click', () => {
       requestAnimationFrame(() => {
         this.focus();
       });
     });
 
-    $tabs.tab();
+    $(tabs).tab();
 
-    this.previewUrl = $tabPreviewer.attr('data-preview-url');
-    this.previewContext = $tabPreviewer.attr('data-preview-context');
+    this.previewUrl = tabPreviewer.getAttribute('data-preview-url');
+    this.previewContext = tabPreviewer.getAttribute('data-preview-context');
     this.previewMode = this.options.previewMode ?? 'comment';
     this.previewWiki = this.options.previewWiki ?? false;
-    $tabPreviewer.on('click', async () => {
+    tabPreviewer.addEventListener('click', async () => {
       const formData = new FormData();
       formData.append('mode', this.previewMode);
       formData.append('context', this.previewContext);
@@ -167,7 +166,7 @@ class ComboMarkdownEditor {
       formData.append('wiki', this.previewWiki);
       const response = await POST(this.previewUrl, {data: formData});
       const data = await response.text();
-      renderPreviewPanelContent($panelPreviewer, data);
+      renderPreviewPanelContent($(panelPreviewer), data);
     });
   }