First you need to include the jQuery library, since ClassyEdit is a plugin. You can download it from the jQuery website or link it directly from the Google CDN.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
Secondly, you need to include the jQuery ClassyEdit javascript and the css file into your page. You can do it by adding the code below to your page.
<script src="js/jquery.classyedit.js"></script>
<link rel="stylesheet" type="text/css" href="css/jquery.classyedit.css" />
Next, you add a textarea into the page.
<textarea class="classy-editor"></textarea>
As the last step, you trigger the ClassyEdit() function on the element you just created. In this case, we trigger the editor on the element with the class class-editor.
$(".classy-editor").ClassyEdit();