Typescript自定义事件

export class E {
  public dispatcher: Element = document.createElement("dispatcher");
  public dispatch(event: string): void {
    try {
      this.dispatcher.dispatchEvent(new Event(event));
    } catch (error) {
      let evt = document.createEvent("HTMLEvents");//IE
      evt.initEvent(event, false, true);
      this.dispatcher.dispatchEvent(evt);
    }
  }
}