REGEX-based solution to getting any parameter in a given URL by passing `name`.

getUrlParameterByName.js

   getParameterByName(name: string, url: string) {
    if (!url) { url = window.location.href; }
    name = name.replace(/[\[\]]/g, '\\$&');
    const regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)'),
        results = regex.exec(url);
    if (!results) { return null; }
    if (!results[2]) { return ''; }
    return decodeURIComponent(results[2].replace(/\+/g, ' '));
}