JSFiddle - React, Tailwind, and code Playground

HTML

<p>

</p>

JavaScript

var string = '<input type="hidden" name="lt" value="LT-24-EskCKFJ4NghflvpXkuveCdZ1VvWPLi" />',
 text = /\sname="lt"\s+(?:.*?\s+)?value="([^"]+)"/.exec(string)[1];
 
document.getElementsByTagName("p")[0].innerHTML = text;