function url(uri, path = "", loc) {
    let obj = uri;
    // default to window.location
    loc = loc || (typeof location !== "undefined" && location);
    if (null == uri)
        uri = loc.protocol + "//" + loc.host;
    // relative path support
    if (typeof uri === "string") {
        if ("/" === uri.charAt(0)) {
            if ("/" === uri.charAt(1)) {
                uri = loc.protocol + uri;
            }
            else {
                uri = loc.host + uri;
            }
        }
        if (!/^(https?|wss?):\/\//.test(uri)) {
            if ("undefined" !== typeof loc) {
                uri = loc.protocol + "//" + uri;
            }
            else {
                uri = "https://" + uri;
            }
        }
        // parse
        obj = (0,engine_io_client__WEBPACK_IMPORTED_MODULE_0__.parse)(uri);
    }
    // make sure we treat `localhost:80` and `localhost` equally
    if (!obj.port) {
        if (/^(http|ws)$/.test(obj.protocol)) {
            obj.port = "80";
        }
        else if (/^(http|ws)s$/.test(obj.protocol)) {
            obj.port = "443";
        }
    }
    obj.path = obj.path || "/";
    const ipv6 = obj.host.indexOf(":") !== -1;
    const host = ipv6 ? "[" + obj.host + "]" : obj.host;
    // define unique id
    obj.id = obj.protocol + "://" + host + ":" + obj.port + path;
    // define href
    obj.href =
        obj.protocol +
            "://" +
            host +
            (loc && loc.port === obj.port ? "" : ":" + obj.port);
    return obj;
}
URL parser.

@param uri - url
@param path - the request path of the connection
@param loc - An object meant to mimic window.location.
       Defaults to window.location.
@public