Element: blur event

在此页

范例
规范
浏览器兼容性
另请参阅
相关话题

blur event fires when an element has lost focus. The main difference between this event and focusout is that focusout bubbles while blur 不会。

The opposite of blur is focus .

冒泡	No
可取消	No
接口	`FocusEvent`
事件处理程序特性	`onblur`
Sync / Async	Sync
Composed	Yes

范例

简单范例

HTML

<form id="form">
  <input type="text" placeholder="text input">
  <input type="password" placeholder="password">
</form>

JavaScript

const password = document.querySelector('input[type="password"]');
password.addEventListener('focus', (event) => {
  event.target.style.background = 'pink';
});
password.addEventListener('blur', (event) => {
  event.target.style.background = '';
});

结果

事件委托

There are two ways of implementing event delegation for this event: by using the focusout event, or by setting the useCapture 参数对于 addEventListener() to true .

HTML

<form id="form">
  <input type="text" placeholder="text input">
  <input type="password" placeholder="password">
</form>

JavaScript

const form = document.getElementById('form');
form.addEventListener('focus', (event) => {
  event.target.style.background = 'pink';
}, true);
form.addEventListener('blur', (event) => {
  event.target.style.background = '';
}, true);

结果

规范

规范	状态	注释
UI Events	工作草案	Added info that this event is composed.
DOM (文档对象模型) 3 级事件规范	过时	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
`blur` event	Chrome 1	Edge 12	Firefox 24 24 不支持 6 — 24 The interface for this event is `事件` , not `FocusEvent` .	IE 9	Opera 11.6	Safari 3.1	WebView Android 1	Chrome Android 18	Firefox Android 24 24 不支持 6 — 24 The interface for this event is `事件` , not `FocusEvent` .	Opera Android 12.1	Safari iOS 2	Samsung Internet Android 1.0

图例

完整支持

值 Document.activeElement varies across browsers while this event is being handled ( bug 452307 ): IE10 sets it to the element that the focus will move to, while Firefox and Chrome often set it to the body of the document.

另请参阅

相关事件： focus , focusin , focusout
此事件在 Window 目标： blur event

元数据

最后修改： May 1, 2020

在此页

范例

简单范例

HTML

JavaScript

结果

事件委托

HTML

JavaScript

结果

规范

浏览器兼容性

图例

另请参阅

相关话题