You can change the entire look and feel, can able to add button / event / can do anything with it. Read documentation here or more example here
HTML:
<div id="editor" placeholder="Type here ... "></div>
CSS:
<link rel="stylesheet" href="path_to/easyeditor.css">
JS:
<script src="path_to/jquery.min.js"></script> <script src="path_to/jquery.easyeditor.js"></script> <script> EasyEditor.prototype.custombutton = function(){ var _this = this; var settings = { buttonIdentifier: 'custombutton', buttonHtml: 'My custom button', clickHandler: function(){ var span = document.createElement('span'); $(span).html('My custom button text '); _this.insertAtCaret(span); } }; _this.injectButton(settings); }; jQuery(document).ready(function($) { new EasyEditor('#editor', { buttons: ['bold', 'italic', 'link', 'h2', 'h3', 'h4', 'alignleft', 'aligncenter', 'alignright', 'custombutton'] }); }); </script>