//事件的创建与触发
//首先需要提前定义好事件，并且注册相关的EventListener
let myEvent = new CustomEvent('event_name', {
    detail: { title: 'This is title!' }
});
window.addEventListener('event_name', () => {
    console.log('我得到了一些参数：', event.detail.title);
});
//随后在对应的元素上触发该事件
if (window.dispatchEvent) {
    window.dispatchEvent(myEvent);
} else {
    window.fireEvent(myEvent);
}