在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

EventTarget() 构造函数创建新 EventTarget 对象实例。

句法

var myEventTarget = new EventTarget();
					

参数

None.

返回值

An instance of the EventTarget 对象。

范例

class MyEventTarget extends EventTarget {
  constructor(mySecret) {
    super();
    this._secret = mySecret;
  }
  get secret() { return this._secret; }
};
let myEventTarget = new MyEventTarget(5);
let value = myEventTarget.secret;  // == 5
myEventTarget.addEventListener("foo", function(e) {
  this._secret = e.detail;
});
let event = new CustomEvent("foo", { detail: 7 });
myEventTarget.dispatchEvent(event);
let newValue = myEventTarget.secret; // == 7
					

规范

规范	状态	注释
DOM The definition of 'EventTarget() constructor' in that specification.	实时标准

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
EventTarget() 构造函数	Chrome 64	Edge ≤79	Firefox 59	IE No	Opera 51	Safari No	WebView Android 64	Chrome Android 64	Firefox Android 59	Opera Android 47	Safari iOS No	Samsung Internet Android 9.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• EventTarget

元数据

• 最后修改： Mar 18, 2019

相关话题

1. EventTarget
2. 构造函数

   1. EventTarget()
3. 方法

   1. addEventListener()
   2. dispatchEvent()
   3. removeEventListener()
4. DOM 事件相关页面

   1. CompositionEvent
   2. 事件
   3. EventListener
   4. FocusEvent
   5. InputEvent
   6. KeyboardEvent
   7. MouseEvent
   8. MouseScrollEvent
   9. MouseWheelEvent
   10. MutationEvent
   11. ProgressEvent
   12. UIEvent
   13. WheelEvent