1const queryString = window.location.search;
2const parameters = new URLSearchParams(queryString);
3const value = parameters.get('key');

1const urlParams = new URLSearchParams(window.location.search);
2const myParam = urlParams.get('myParam');
3

1// example url: https://mydomain.com/?fname=johnny&lname=depp
2const urlParams = new URLSearchParams(window.location.search);
3const firstName = urlParams.get('fname'); // johnny

1function getUrlParameter(name) {
2    name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
3    var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
4    var results = regex.exec(location.search);
5    return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
6};