TinyMCE characters counter plugin

script.js

tinymce.init({
  plugins: 'charactercount',
  elementpath: false
});

tinymce-charactercount.plugin.js

/**
 * Credit: https://amystechnotes.com/2015/05/06/tinymce-add-character-count/
 * This is a slightly modified version to work with more recent TinyMCE version, fix some code styling and don't trim 
 * trailing and leading whitespaces from count.
 */

tinymce.PluginManager.add('charactercount', function (editor) {
  var _self = this;

  function update() {
    editor.theme.panel.find('#charactercount').text(['Characters: {0}', _self.getCount()]);
  }

  editor.on('init', function () {
    var statusbar = editor.theme.panel && editor.theme.panel.find('#statusbar')[0];

    if (statusbar) {
      window.setTimeout(function () {
        statusbar.insert({
          type: 'label',
          name: 'charactercount',
          text: ['Characters: {0}', _self.getCount()],
          classes: 'charactercount',
          disabled: editor.settings.readonly
        }, 0);

        editor.on('setcontent beforeaddundo keyup', update);
      }, 0);
    }
  });

  _self.getCount = function () {
    var tx = editor.getContent({ format: 'raw' });
    var decoded = decodeHtml(tx);
    var decodedStripped = decoded.replace(/(<([^>]+)>)/ig, '');
    var tc = decodedStripped.length;
    return tc;
  };

  function decodeHtml(html) {
    var txt = document.createElement('textarea');
    txt.innerHTML = html;
    return txt.value;
  }
});

tinymce.sass

.mce-label.mce-charactercount
  margin: 2px 0 2px 2px
  padding: 8px
  font-size: 12px

.mce-path
  display: none !important

Rename the folder charactercount
Change the first line to
tinymce.PluginManager.add('charactercount', function (editor,url) {
Just below that add:
tinymce.DOM.loadCSS(url + '/css/charactercount.css');
Minify the file and name it plugin.min.js
Create a subfolder called css
Create a file within that folder called charactercount.css
Place the following css:
.mce-label.mce-charactercount {
margin: 2px 0 2px 2px;
padding: 8px;
font-size: 14px;
}
Clear your cache and reload the page. Works great!

Is there a way to limit the maximum number of characters that can be entered, like the maxlength attribute on textarea ?

I guess Adding custom text in statusbar in TinyMCE 5.x does not work like it used to in 4.x.

I had tried this code but it is not working for me can any once check my code.

tinymce.PluginManager.add('charactercount', function (editor) {
	var _self = this;

	function update() {
editor.theme.panel.find('#charactercount').text(['Characters: {0}', _self.getCount()]);
	}

	editor.on('init', function () {
var statusbar = editor.theme.panel && editor.theme.panel.find('#statusbar')[0];

if (statusbar) {
		window.setTimeout(function () {
	statusbar.insert({
			type: 'label',
			name: 'charactercount',
			text: ['Characters: {0}', _self.getCount()],
			classes: 'charactercount',
			disabled: editor.settings.readonly
	}, 0);

	editor.on('setcontent beforeaddundo keyup', update);
		}, 0);
}
	});

	_self.getCount = function () {
var tx = editor.getContent({ format: 'raw' });
var decoded = decodeHtml(tx);
var decodedStripped = decoded.replace(/(<([^>]+)>)/ig, '');
var tc = decodedStripped.length;
return tc;
	};

	function decodeHtml(html) {
var txt = document.createElement('textarea');
txt.innerHTML = html;
return txt.value;
	}
});

tinymce.init({
selector:'.product_desc',
height : "280",
plugins: 'lists code charactercount',
elementpath: false,
branding: false,
toolbar: 'undo redo | styleselect | bold italic | alignleft aligncenter alignright alignjustify | outdent indent | code | numlist bullist ',
init_instance_callback: function (ed) {
	ed.on('keyup', function (e) {
		var max = 300;
		var count = ed.contentDocument.body.innerText.length;
		//console.log(count);
		document.getElementById("character_count").innerHTML = "Characters: " + count;
		if (count > max) {
			alert("Maximum " + max + " characters allowed.");
			return false;
		}
	});
	ed.on('keypress', function (e) {
		var max = 300;
		var count = ed.contentDocument.body.innerText.length;
		console.log("Key Press");
		count = count + 1;
		console.log(count);
		if (count > max) {
			alert("Maximum " + max + " characters allowed.");
			return false;
		}
	});
}
});