quill - rich text editor.

<!-- Add the theme's stylesheet -->
<link rel="stylesheet" href="//cdn.quilljs.com/1.3.6/quill.bubble.css">

<script src="//cdn.quilljs.com/1.3.6/quill.js"></script>
<script>
var quill = new Quill('#editor', {
  theme: 'bubble'   // Specify theme in configuration
});
</script>