parseUri 1.2.2 Author: Steven Levithan URL: http://blog.stevenlevithan.com/archives/parseuri

parseuri.js

// parseUri 1.2.2
// (c) Steven Levithan <stevenlevithan.com>
// MIT License

function parseUri (str) {
    var o   = {
                strictMode: false,
                key: ["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"],
                q:   {
                    name:   "queryKey",
                    parser: /(?:^|&)([^&=]*)=?([^&]*)/g
                },
                parser: {
                    strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
                    loose:  /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/
                }
              },
        m   = o.parser[o.strictMode ? "strict" : "loose"].exec(str),
        uri = {},
        i   = 14;

    while (i--) uri[o.key[i]] = m[i] || "";

    uri[o.q.name] = {};
    uri[o.key[12]].replace(o.q.parser, function ($0, $1, $2) {
        if ($1) uri[o.q.name][$1] = $2;
    });

    return uri;
};

// without query string parser: https://gist.github.com/jlong/2428561

I've been using this for years but recently found out there's now a URL parser in the javascript spec:
https://developer.mozilla.org/en-US/docs/Web/API/URL

Thank you!

var url = new URL("http://www.example.com/cats#tabby");
for (part in url) { console.log(part, url[part]); }