Using Javascript to get a variable from a URL

Sometimes, within a website, you see variables that are passed through the URL. The variable part of the URL usually looks something like this:
“?tab=mo&authuser=0″

In the above example, ‘tab’ is equal to ‘mo’ and ‘authuser’ is equal to ‘0’.

This snippet below with let you extract the values of variables by parsing the URL. It specifically looks for the & and = symbols so you’ll need to make some changes to the regex part (/[?&]+([^=&]+)=([^&]*)/gi) if you’re using symbols other than that.

function getUrlVar() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
        vars[key] = value;
    });
    return vars; 
}
var tab = getUrlVar()["tab"];
var user = getUrlVar()["authuser"];