Set Character limit for tinymce Text Editor

tinymce-char-length.js

/**
* This was an expamle of tinymce in repeatable field 
* I hav't handled case for copy paste text in the editor so max limit will not be checked when you cntl+c&cntl+v
* but on texteditor change I have reset the content to max char limit.
*/
jQuery( document ).on( 'tinymce-editor-init', function( event, editor ) {
		jQuery(".games-section .repeatable-item").each(function(){
			var this_id = jQuery(this).attr('data-items');
			var this_id = 'book_game_item_description_' + this_id;
			// on keypress check the char limit, It will take space as char and not allow to write after char limit crossed.
		  	tinyMCE.get(this_id).on( 'keypress', function(e) {
		  		var body = tinymce.get(this_id).getBody();
        		var content = tinymce.trim(body.innerText || body.textContent);
			    var max = 230;
			    var len = content.length;
			    var diff = max - len;       
			    if ( diff < 1 )
			        tinymce.dom.Event.cancel(e);
			});
			// on tinymce change event fire, It will check if anything other texteditor have limit crossed text then reset it to max limit.
			tinyMCE.get(this_id).on( 'change', function(e) {
				jQuery(".games-section .repeatable-item").each(function(){
					var game_editor_id = jQuery(this).attr('data-items');
					var game_editor_id = 'book_game_item_description_' + game_editor_id;
					var body = tinymce.get(game_editor_id).getBody();
	        		var content = tinymce.trim(body.innerText || body.textContent);
				    var max = 230;
				    var len = content.length;
				    var diff = max - len;       
				    if ( diff < 1 )
				    	content = content.substring(0,230);
				    	tinyMCE.get(game_editor_id).setContent(content);
				});
			});
		});
});