JSFiddle - React, Tailwind, and code Playground

HTML

<h1>Web Developer</h1>
<a href="example.com/?Question12=">job link</a>
<hr>
<div id="href"></div>

JavaScript

var link = $("a").attr("href");

link = link+$("h1").html();

link = link.replace(/\s/g,"%20");

$('a').attr("href", link);

$("#href").html(link);