uri.js

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

Also:

new URL('https://user:pass@gist.github.com:3000/jlong/2428561?foo=bar#test') =>
    {
        hash: "#test",
        search: "?foo=bar",
        pathname: "/jlong/2428561",
        port: "3000",
        hostname: "gist.github.com",
        host: "gist.github.com",
        password: "pass",
        username: "user",
        protocol: "https:",
        origin: "https://gist.github.com",
        href: "https://gist.github.com/jlong/2428561?foo=bar#test"
    }