JSFiddle - React, Tailwind, and code Playground

HTML

<a id="mylink" href="http://www.example.com/.../?parameter1=...&parameter2=PARAMETER2">text here</a>

JavaScript

function getUrlVars(_url)
{
    var vars = [], hash;
    var hashes = _url.slice(window.location.href.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}

var myLINK = document.getElementById("mylink");
var url = myLINK.href;
myLINK.href = getUrlVars(url )["parameter2"];