JSFiddle - React, Tailwind, and code Playground

HTML

<script 
			  src="https://code.jquery.com/jquery-2.2.3.min.js"
			  integrity="sha256-a23g1Nt4dtEYOj7bR+vTu7+T8VP13humZFBJNIYoEJo="
			  crossorigin="anonymous"></script>
<script src="//cdn.ckeditor.com/4.5.8/standard/ckeditor.js"></script>
<div>
<button id="insert">
Вставить токен
</button>
<button id="ckeditor">
Включить ckeditor
</button>
<button id="ckeditordel">
Выключить ckeditor
</button>
</div>
<div>
<textarea id="textarea1" rows="10" cols="50">
  первая строка
  вторая строка
</textarea>
</div>

JavaScript

jQuery.fn.extend({
insertAtCaret: function(myValue){
  return this.each(function(i) {
    if (document.selection) {
      //For browsers like Internet Explorer
      this.focus();
      var sel = document.selection.createRange();
      sel.text = myValue;
      this.focus();
    }
    else if (this.selectionStart || this.selectionStart == '0') {
      //For browsers like Firefox and Webkit based
      var startPos = this.selectionStart;
      var endPos = this.selectionEnd;
      var scrollTop = this.scrollTop;
      this.value = this.value.substring(0, startPos)+myValue+this.value.substring(endPos,this.value.length);
      this.focus();
      this.selectionStart = startPos + myValue.length;
      this.selectionEnd = startPos + myValue.length;
      this.scrollTop = scrollTop;
    } else {
      this.value += myValue;
      this.focus();
    }
  });
}
});
CKEDITOR.env.isCompatible = true;
$(document).ready(function(){
var editor = null;    
$('#insert').click(function(){
    	   $('#textarea1').insertAtCaret(' [[INSERT]] ');
      });
$('#ckeditor').click(function(){
    	editor = CKEDITOR.replace('textarea1');
    });    
$('#ckeditordel').click(function(){
    	if (editor) {
      editor.destroy();
      editor = null;
      }
    });    
    
});