Window: rejectionhandled event

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rejectionhandled event is sent to the script's global scope (usually window but also Worker ) whenever a JavaScript Promise is rejected but after the promise rejection has been handled. This can be used in debugging and for general application resiliency, in tandem with the unhandledrejection event, which is sent when a promise is rejected but there is no hander for the rejection.

冒泡	No
可取消	No
接口	`PromiseRejectionEvent`
事件处理程序特性	`onrejectionhandled`

范例

可以使用 rejectionhandled event to log promises that get rejected to the console, along with the reasons why they were rejected:

window.addEventListener("rejectionhandled", event => {
  console.log("Promise rejected; reason: " + event.reason);
}, false);

规范

规范	状态	注释
HTML 实时标准 The definition of 'rejectionhandled' in that specification.	实时标准	初始定义。

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
`rejectionhandled` event	Chrome 49	Edge ≤79	Firefox 69 69 Disabled ). To change preferences in Firefox, visit	IE No	Opera 36	Safari 11	WebView Android 49	Chrome Android 49	Firefox Android 68	Opera Android 36	Safari iOS 11.3	Samsung Internet Android 5.0

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