Moved Class to its own class

app/assets/javascripts/behaviors/gl_emoji.js

 import 'document-register-element';
 import isEmojiUnicodeSupported from '../emoji/support';
 
-export default function installGlEmojiElement() {
-  if (!customElements.get('gl-emoji')) {
-    customElements.define(
-      'gl-emoji',
-      class extends HTMLElement {
+class GlEmoji extends HTMLElement {
   constructor() {
     super();
 
@@ -18,11 +14,7 @@ export default function installGlEmojiElement() {
     const hasImageFallback = fallbackSrc && fallbackSrc.length > 0;
     const hasCssSpriteFalback = fallbackSpriteClass && fallbackSpriteClass.length > 0;
 
-          if (
-            emojiUnicode &&
-            isEmojiUnicode &&
-            !isEmojiUnicodeSupported(emojiUnicode, unicodeVersion)
-          ) {
+    if (emojiUnicode && isEmojiUnicode && !isEmojiUnicodeSupported(emojiUnicode, unicodeVersion)) {
       // CSS sprite fallback takes precedence over image fallback
       if (hasCssSpriteFalback) {
         if (!gon.emoji_sprites_css_added && gon.emoji_sprites_css_path) {
@@ -51,7 +43,10 @@ export default function installGlEmojiElement() {
       }
     }
   }
-      },
-    );
+}
+
+export default function installGlEmojiElement() {
+  if (!customElements.get('gl-emoji')) {
+    customElements.define('gl-emoji', GlEmoji);
   }
 }