Fix codesandbox uglify error

Author: jhildenbiddle

src/plugins/emoji.js

@@ -1,4 +1,18 @@
+import emojiData from '../core/render/emojify-data';
+
 // Deprecation notice
 if (window && window.console) {
  console.info('Docsify emoji plugin has been deprecated as of v4.13');
 }
+
+// Emoji from GitHub API
+// https://api.github.com/emojis
+window.emojify = function (match, $1) {
+ return Object.prototype.hasOwnProperty.call(emojiData, $1) === false
+ ? match
+ : '<img class="emoji" src="https://github.githubassets.com/images/icons/emoji/' +
+ emojiData[$1] +
+ '.png" alt="' +
+ $1 +
+ '" />';
+};