Fix custom emoji animation on hover in WebUI directory bios (#11716)

app/javascript/mastodon/features/directory/components/account_card.js

@@ -82,6 +82,43 @@ class AccountCard extends ImmutablePureComponent {
     onMute: PropTypes.func.isRequired,
   };
 
+  _updateEmojis () {
+    const node = this.node;
+
+    if (!node || autoPlayGif) {
+      return;
+    }
+
+    const emojis = node.querySelectorAll('.custom-emoji');
+
+    for (var i = 0; i < emojis.length; i++) {
+      let emoji = emojis[i];
+      if (emoji.classList.contains('status-emoji')) {
+        continue;
+      }
+      emoji.classList.add('status-emoji');
+
+      emoji.addEventListener('mouseenter', this.handleEmojiMouseEnter, false);
+      emoji.addEventListener('mouseleave', this.handleEmojiMouseLeave, false);
+    }
+  }
+
+  componentDidMount () {
+    this._updateEmojis();
+  }
+
+  componentDidUpdate () {
+    this._updateEmojis();
+  }
+
+  handleEmojiMouseEnter = ({ target }) => {
+    target.src = target.getAttribute('data-original');
+  }
+
+  handleEmojiMouseLeave = ({ target }) => {
+    target.src = target.getAttribute('data-static');
+  }
+
   handleFollow = () => {
     this.props.onFollow(this.props.account);
   }
@@ -94,6 +131,10 @@ class AccountCard extends ImmutablePureComponent {
     this.props.onMute(this.props.account);
   }
 
+  setRef = (c) => {
+    this.node = c;
+  }
+
   render () {
     const { account, intl } = this.props;
 
@@ -133,7 +174,7 @@ class AccountCard extends ImmutablePureComponent {
           </div>
         </div>
 
-        <div className='directory__card__extra'>
+        <div className='directory__card__extra' ref={this.setRef}>
           <div className='account__header__content' dangerouslySetInnerHTML={{ __html: account.get('note_emojified') }} />
         </div>