JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="myText" maxlength="200" style="width:70%;height:200px">
    Lorem Ipsum is simply dummy text of the printing and typesetting industry.
    Lorem Ipsum has been the industry's standard dummy text ever since the 1500s...
    Enter something:
</textarea>

<div>
    Char Count <span id="count"></span>/<span id="max"></span>
</div>

JavaScript

var ta = document.getElementById('myText');
    
document.getElementById('max').innerHTML = ta.maxLength;

setInterval(function() {
    document.getElementById('count').innerHTML = ta.value.length;
}, 250);