Method constructor

deps/undici/undici.js:15942–15972

* @param {string} url * @param {string|string[]} protocols

(url, protocols = [])

       * @param {string|string[]} protocols
       */
      constructor(url, protocols = []) {
        super();
        webidl.util.markAsUncloneable(this);
        const prefix = "WebSocket constructor";
        webidl.argumentLengthCheck(arguments, 1, prefix);
        const options = webidl.converters["DOMString or sequence<DOMString> or WebSocketInit"](protocols, prefix, "options");
        url = webidl.converters.USVString(url);
        protocols = options.protocols;
        const baseURL = environmentSettingsObject.settingsObject.baseUrl;
        const urlRecord = getURLRecord(url, baseURL);
        if (typeof protocols === "string") {
          protocols = [protocols];
        }
        if (protocols.length !== new Set(protocols.map((p) => p.toLowerCase())).size) {
          throw new DOMException("Invalid Sec-WebSocket-Protocol value", "SyntaxError");
        }
        if (protocols.length > 0 && !protocols.every((p) => isValidSubprotocol(p))) {
          throw new DOMException("Invalid Sec-WebSocket-Protocol value", "SyntaxError");
        }
        this.#url = new URL(urlRecord.href);
        const client = environmentSettingsObject.settingsObject;
        this.#handler.controller = establishWebSocketConnection(
          urlRecord,
          protocols,
          client,
          this.#handler,
          options
        );
        this.#handler.readyState = _WebSocket.CONNECTING;
        this.#binaryType = "blob";
      }
      /**
       * @see https://websockets.spec.whatwg.org/#dom-websocket-close
       * @param {number|undefined} code