js get url variables

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

1const postID = (new URLSearchParams(window.location.search)).get('post');

1var getParams = function (url) {
2	var params = {};
3	var parser = document.createElement('a');
4	parser.href = url;
5	var query = parser.search.substring(1);
6	var vars = query.split('&');
7	for (var i = 0; i < vars.length; i++) {
8		var pair = vars[i].split('=');
9		params[pair[0]] = decodeURIComponent(pair[1]);
10	}
11	return params;
12};

1examplepage.php?var1=value&var2=value