Function parseOrigin

github-actions/browserstack/set-browserstack-env.js:1281–1287

(url)

        return url;
      }
      function parseOrigin(url) {
        url = parseURL(url);
        if (url.pathname !== "/" || url.search || url.hash) {
          throw new InvalidArgumentError("invalid url");
        }
        return url;
      }
      function getHostname(host) {
        if (host[0] === "[") {
          const idx2 = host.indexOf("]");