JSFiddle - React, Tailwind, and code Playground

HTML

<a id="myLink" href="http://google.com?param1=hello&param2=ohmygosh">My Link</a>

JavaScript

var getParameterByName = function(name, locationObject) {
  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
  var regexS = "[\\?&]" + name + "=([^&#]*)";
  var regex = new RegExp(regexS);
  var results = regex.exec(locationObject.search);
  if(results == null)
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

var myLink = document.querySelector('#myLink');
var param1 = getParameterByName('param1', myLink);
var param2 = getParameterByName('param2', myLink);
alert('param1: ' + param1 + '\nparam2: ' + param2);