JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>

JavaScript

d = '00:10:01'
if(d.match(/\d{2}:\d{2}:\d{2}/)) {
    console.log(!!d.match(/\d{2}:\d{2}:\d{2}/));
}
else {
    console.log(!!d.match(/\d{2}:\d{2}:\d{2}/));
}