Method onMessageHandler

ch2-patterns/rpc-worker.js:9–15

(msg)

  }
// THIS LINE SHOULD NOT APPEAR IN PRINT
  onMessageHandler(msg) {
    const { result, error, id } = msg.data;
    const { resolve, reject } = this.in_flight_commands.get(id);
    this.in_flight_commands.delete(id);
    if (error) reject(error);
    else resolve(result);
  }
// THIS LINE SHOULD NOT APPEAR IN PRINT
  exec(method, ...args) {
    const id = ++this.next_command_id;