JSFiddle - React, Tailwind, and code Playground

HTML

<b>Message:</b>
<textarea name="txtVdoScript" id="word_count" cols="20" rows="5"></textarea>
<span style="padding-left:10px;">Total word Count : <span style="font-size:16px; color:black;" id="display_count">0</span> words.</span>

JavaScript

$('#word_count').on('keyup', function() {
    $('#display_count').text(this.value.split(/\b\S+\b/g).length-1)
});