Method on

packages/editor-core/src/event-bus.ts:50–56

* 监听事件 * @param event 事件名称 * @param listener 事件回调

(event: string, listener: (...args: any[]) => void)

   * @param listener 事件回调
   */
  on(event: string, listener: (...args: any[]) => void): () => void {
    this.eventEmitter.on(event, listener);
    this.getLogger().debug(`${this.getMsgPrefix('on')} ${event}`);
    return () => {
      this.off(event, listener);
    };
  }

  prependListener(event: string, listener: (...args: any[]) => void): () => void {
    this.eventEmitter.prependListener(event, listener);