JSFiddle - React, Tailwind, and code Playground

HTML

<form action="#">
	<textarea name="limitChars" id="limitInput" cols="30" rows="10"></textarea>
	</form>
	<div id="typeChars"></div>

JavaScript

var a = document.querySelector('#limitInput'),
    b = document.querySelector('#typeChars'),
    c = 'Символов: ', d;

b.innerText = c + '0';

a.addEventListener('keydown', function(e) {
  d = e.target.value;
  
  if (d.indexOf(' ') !== -1) {
    b.innerText = c + d.length;
  	return true;
  }
  b.innerText = c + '0';
  
});