JSFiddle - React, Tailwind, and code Playground
by seadonk
HTML
<b id="test">This is a test</b><a id="mylink" href="">Test over!</a>
JavaScript
(function () {
var a = document.getElementById('mylink');
var fooLink = 'foo.php';
var link = fooLink + '?bar=yay';
a.href = link;
})();