JSFiddle - React, Tailwind, and code Playground

by Qwerty_Wasd

HTML

<input id="test" type="text" maxlength="200"/><span></span>

JavaScript

document.getElementById(`test`)
  .addEventListener(`input`, e => {
  	e.target.nextElementSibling.textContent =
	(e.target.value.trim() != ``) ?
	` Осталось ${e.target.maxLength - (+e.target.value.trim().length)} символ(ов\\а)` :
	;
});