1// www.example.com/users?token=12345
2
3let params = (new URL(document.location)).searchParams;
4let token = params.get("token");
5// 12345

1let params = {};
2window.location.search.slice(1).split('&').forEach(elm => {
3  if (elm === '') return;
4  let spl = elm.split('=');
5  const d = decodeURIComponent;
6  params[d(spl[0])] = (spl.length >= 2 ? d(spl[1]) : true);
7});
8
9// https://example.com/?foo=bar&best%20food=D%C3%B6ner
10params['foo'] // bar
11params['best food'] // Döner

1function GetURLParameter(sParam)
2{
3    var sPageURL = window.location.search.substring(1);
4    var sURLVariables = sPageURL.split('&');
5    for (var i = 0; i < sURLVariables.length; i++) 
6    {
7        var sParameterName = sURLVariables[i].split('=');
8        if (sParameterName[0] == sParam) 
9        {
10            return sParameterName[1];
11        }
12    }
13}​
14