Parsing query string parameters into a collection

Here’s a utility function for parsing query parameters:

function getQueryParams(qs) {
    qs = qs.split("+").join(" ");
    var params = {};
    var tokens, re = /[?&]?([^=]+)=([^&]*)/g;

    while (tokens = re.exec(qs)) {
        params[decodeURIComponent(tokens[1])]
            = decodeURIComponent(tokens[2]);
    }

    return params;
}

//var query = getQueryParams(document.location.search);
//alert(query.foo);

A nice things is that it’s decoupled from document.location.search.

Tags: intermediate snippets javascript