Method on

client/src/modules/socketClient.js:163–171

* Add event listener * @param {string} event - Event name * @param {Function} handler - Event handler

(event, handler)

   * @param {Function} handler - Event handler
   */
  on(event, handler) {
    if (!this.socket) {
      console.warn("Cannot add listener: socket not initialized");
      return;
    }

    this.socket.on(event, handler);
    this.listeners.set(event + handler.toString(), handler);
  }

  /**
   * Remove event listener