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> var easyEditor = new EasyEditor('#editor', { buttons: ['bold', 'italic', 'link', 'h2', 'h3', 'h4', 'alignleft', 'aligncenter', 'alignright'], overwriteButtonSettings: { 'bold' : { buttonIdentifier: 'overwritten-bold', buttonHtml: 'Overwritten Bold', buttonTitle: 'Make text bold', clickHandler: function(){ easyEditor.wrapSelectionWithNodeName({ nodeName: 'b', keepHtml: true }); } }, 'italic': { buttonHtml: 'Overwritten Italic', buttonTitle: 'Make text italic', } } }); </script>