diff --git a/extensions/embed/js/src/forum/index.js b/extensions/embed/js/src/forum/index.js
index f858688120..75a6290897 100644
--- a/extensions/embed/js/src/forum/index.js
+++ b/extensions/embed/js/src/forum/index.js
@@ -36,7 +36,7 @@ app.pageInfo = Stream({});
 
 const reposition = function () {
   const info = app.pageInfo();
-  this.$().css('top', Math.max(0, info.scrollTop - info.offsetTop));
+  this.element.style.top = Math.max(0, info.scrollTop - info.offsetTop) + 'px';
 };
 
 extend(ModalManager.prototype, 'show', reposition);
@@ -50,7 +50,7 @@ window.iFrameResizer = {
 
 extend('flarum/forum/components/PostStream', 'goToNumber', function (promise, number) {
   if (number === 'reply' && 'parentIFrame' in window && app.composer.isFullScreen()) {
-    const itemTop = this.$('.PostStream-item:last').offset().top;
+    const itemTop = this.element.getBoundingClientRect().top + document.documentElement.scrollTop;
     window.parentIFrame.scrollToOffset(0, itemTop);
   }
 });
diff --git a/extensions/emoji/js/src/forum/addComposerAutocomplete.js b/extensions/emoji/js/src/forum/addComposerAutocomplete.js
index 7d6df93903..120341bd74 100644
--- a/extensions/emoji/js/src/forum/addComposerAutocomplete.js
+++ b/extensions/emoji/js/src/forum/addComposerAutocomplete.js
@@ -24,7 +24,8 @@ export default function addComposerAutocomplete() {
 
   extend('flarum/common/components/TextEditor', 'onbuild', function () {
     this.emojiDropdown = new AutocompleteDropdown();
-    const $editor = this.$('.TextEditor-editor').wrap('<div class="ComposerBody-emojiWrapper"></div>');
+    const editor = this.element.querySelector('.TextEditor-editor');
+    editor.outerHTML = `<div class="ComposerBody-emojiWrapper">${editor.outerHTML}</div>`;
 
     this.navigator = new KeyboardNavigatable();
     this.navigator
@@ -33,9 +34,9 @@ export default function addComposerAutocomplete() {
       .onDown(() => this.emojiDropdown.navigate(1))
       .onSelect(this.emojiDropdown.complete.bind(this.emojiDropdown))
       .onCancel(this.emojiDropdown.hide.bind(this.emojiDropdown))
-      .bindTo($editor);
+      .bindTo(editor);
 
-    $editor.after($('<div class="ComposerBody-emojiDropdownContainer"></div>'));
+    editor.outerHTML = editor.outerHTML + '<div class="ComposerBody-emojiDropdownContainer"></div>';
   });
 
   extend('flarum/common/components/TextEditor', 'buildEditorParams', function (params) {
@@ -134,27 +135,28 @@ export default function addComposerAutocomplete() {
 
           if (suggestions.length) {
             this.emojiDropdown.items = suggestions;
-            m.render(this.$('.ComposerBody-emojiDropdownContainer')[0], this.emojiDropdown.render());
+            m.render(this.element.querySelector('.ComposerBody-emojiDropdownContainer'), this.emojiDropdown.render());
 
             this.emojiDropdown.show();
             const coordinates = this.attrs.composer.editor.getCaretCoordinates(autocompleting.absoluteStart);
-            const width = this.emojiDropdown.$().outerWidth();
-            const height = this.emojiDropdown.$().outerHeight();
-            const parent = this.emojiDropdown.$().offsetParent();
+            const rect = this.emojiDropdown.element.getBoundingClientRect();
+            const width = rect.width;
+            const height = rect.height;
+            const parent = this.emojiDropdown.element.offsetParent;
             let left = coordinates.left;
             let top = coordinates.top + 15;
 
             // Keep the dropdown inside the editor.
-            if (top + height > parent.height()) {
+            if (top + height > parent.clientHeight) {
               top = coordinates.top - height - 15;
             }
-            if (left + width > parent.width()) {
-              left = parent.width() - width;
+            if (left + width > parent.clientWidth) {
+              left = parent.clientWidth - width;
             }
 
             // Prevent the dropdown from going off screen on mobile
-            top = Math.max(-(parent.offset().top - $(document).scrollTop()), top);
-            left = Math.max(-parent.offset().left, left);
+            top = Math.max(-(parent.getBoundingClientRect().top), top);
+            left = Math.max(-parent.getBoundingClientRect().left + document.documentElement.scrollLeft, left);
 
             this.emojiDropdown.show(left, top);
           }
@@ -163,7 +165,7 @@ export default function addComposerAutocomplete() {
         buildSuggestions();
 
         this.emojiDropdown.setIndex(0);
-        this.emojiDropdown.$().scrollTop(0);
+        this.emojiDropdown.element.scrollTo({ top: 0 });
         this.emojiDropdown.active = true;
       }
     });
diff --git a/extensions/emoji/js/src/forum/fragments/AutocompleteDropdown.js b/extensions/emoji/js/src/forum/fragments/AutocompleteDropdown.js
index e4f27921e3..086b56821d 100644
--- a/extensions/emoji/js/src/forum/fragments/AutocompleteDropdown.js
+++ b/extensions/emoji/js/src/forum/fragments/AutocompleteDropdown.js
@@ -18,17 +18,15 @@ export default class AutocompleteDropdown extends Fragment {
   }
 
   show(left, top) {
-    this.$()
-      .show()
-      .css({
-        left: left + 'px',
-        top: top + 'px',
-      });
+    const style = this.element.style;
+    style.display = 'block';
+    style.left = left + 'px';
+    style.top = top + 'px';
     this.active = true;
   }
 
   hide() {
-    this.$().hide();
+    this.element.style.display = 'none';
     this.active = false;
   }
 
@@ -40,42 +38,51 @@ export default class AutocompleteDropdown extends Fragment {
   }
 
   complete() {
-    this.$('li:not(.Dropdown-header)').eq(this.index).find('button').click();
+    this.element.querySelectorAll('li:not(.Dropdown-header)')[this.index].querySelector('button').click();
   }
 
+  // todo: check if copied implementation matches the original behavior
   setIndex(index, scrollToItem) {
     if (this.keyWasJustPressed && !scrollToItem) return;
 
-    const $dropdown = this.$();
-    const $items = $dropdown.find('li:not(.Dropdown-header)');
+    const dropdown = this.element;
+    const items = dropdown.querySelectorAll('li:not(.Dropdown-header)');
     let rangedIndex = index;
 
     if (rangedIndex < 0) {
-      rangedIndex = $items.length - 1;
-    } else if (rangedIndex >= $items.length) {
+      rangedIndex = items.length - 1;
+    } else if (rangedIndex >= items.length) {
       rangedIndex = 0;
     }
 
     this.index = rangedIndex;
 
-    const $item = $items.removeClass('active').eq(rangedIndex).addClass('active');
+    items.forEach((el) => el.classList.remove('active'));
+    const item = items[rangedIndex];
+    item.classList.add('active');
 
     if (scrollToItem) {
-      const dropdownScroll = $dropdown.scrollTop();
-      const dropdownTop = $dropdown.offset().top;
-      const dropdownBottom = dropdownTop + $dropdown.outerHeight();
-      const itemTop = $item.offset().top;
-      const itemBottom = itemTop + $item.outerHeight();
+      const documentScrollTop = document.documentElement.scrollTop;
+      const dropdownScroll = dropdown.scrollTop;
+      const dropdownRect = dropdown.getBoundingClientRect();
+      const dropdownTop = dropdownRect.top + documentScrollTop;
+      const dropdownBottom = dropdownTop + dropdownRect.height;
+      const itemRect = item.getBoundingClientRect();
+      const itemTop = itemRect.top + documentScrollTop;
+      const itemBottom = itemTop + itemRect.height;
 
       let scrollTop;
       if (itemTop < dropdownTop) {
-        scrollTop = dropdownScroll - dropdownTop + itemTop - parseInt($dropdown.css('padding-top'), 10);
+        scrollTop = dropdownScroll - dropdownTop + itemTop - parseInt(getComputedStyle(dropdown).paddingTop, 10);
       } else if (itemBottom > dropdownBottom) {
-        scrollTop = dropdownScroll - dropdownBottom + itemBottom + parseInt($dropdown.css('padding-bottom'), 10);
+        scrollTop = dropdownScroll - dropdownBottom + itemBottom + parseInt(getComputedStyle(dropdown).paddingBottom, 10);
       }
 
       if (typeof scrollTop !== 'undefined') {
-        $dropdown.stop(true).animate({ scrollTop }, 100);
+        dropdown.scrollTo({
+          top: scrollTop,
+          behavior: 'smooth',
+        });
       }
     }
   }