JSFiddle - React, Tailwind, and code Playground

HTML

<textarea name="txtScript" id="word_count" cols="30" rows="10"></textarea>
<br>
Total word Count : <span id="display_count">0</span> words. Words left : <span id="word_left">200</span>

JavaScript

$(document).ready(function() {
    $("#word_count").on('keydown', function(e) {
        var words = $.trim(this.value).length ? this.value.match(/\S+/g).length : 0;
        if (words <= 200) {
            $('#display_count').text(words);
            $('#word_left').text(200-words)
        }else{
            if (e.which !== 8) e.preventDefault();
        }
    });
 });