JSFiddle - React, Tailwind, and code Playground
JavaScript
var r = new RegExp(/^([01]\d|2[0-3]):[0-5][0-9]:[0-5][0-9]$/);
var x = ('11:11:11');
console.log(x.match(r));
var r = new RegExp(/^([01]\d|2[0-3]):[0-5][0-9]:[0-5][0-9]$/);
var x = ('11:11:11');
console.log(x.match(r));