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EventTarget() 构造方法将会创建一个新的EventTarget 对象实例。

语法

var myEventTarget = new EventTarget();

参数

无。

返回值

一个 EventTarget 实例。

例子

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

Specifications

Specification Status Comment
DOM
EventTarget() constructor
Living Standard  

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.

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support64 ?59 No51 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support6464 ?5951 No No

另见

 

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