Method ports

out/cli.cjs:62830–62836

()

      get lastEventId() {
        webidl.brandCheck(this, _MessageEvent);
        return this.#eventInit.lastEventId;
      }
      get source() {
        webidl.brandCheck(this, _MessageEvent);
        return this.#eventInit.source;
      }
      get ports() {
        webidl.brandCheck(this, _MessageEvent);
        if (!Object.isFrozen(this.#eventInit.ports)) {
          Object.freeze(this.#eventInit.ports);