Split an URL into { protocol, host, port, path } using Javascript

split-url.js

function splitUrl(url) {
    const parts = url.match(/^(http[s]?):\/\/([^:/]*):?(\d*)\/?(.*)$/i);
    if (parts === null) {
        throw Error('invalid url: ' + url);
    } else {
        return {
            protocol: parts[1],
            host: parts[2],
            port: parts[3],
            path: (parts[4] === '') ? '' : ('/' + parts[4])
        };
    }
}