Document: keyup event

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范例
规范
浏览器兼容性
另请参阅
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keyup event is fired when a key is released.

冒泡	Yes
可取消	Yes
接口	`KeyboardEvent`
事件处理程序特性	`onkeyup`

keydown and keyup events provide a code indicating which key is pressed, while keypress indicates which character was entered. For example, a lowercase "a" will be reported as 65 by keydown and keyup , but as 97 by keypress . An uppercase "A" is reported as 65 by all events.

注意： If you're looking for a way to react to changes in an input's value, you should use the input event . Some changes are not detectable by keyup , for example pasting text from the context menu in a text input.

Since Firefox 65, the keydown and keyup events are now fired during IME composition, to improve cross-browser compatibility for CJKT users ( bug 354358 , also see keydown and keyup events are now fired during IME composition for more useful details). To ignore all keyup events that are part of composition, do something like this (229 is a special value set for a keyCode relating to an event that has been processed by an IME):

eventTarget.addEventListener("keyup", event => {
  if (event.isComposing || event.keyCode === 229) {
    return;
  }
  // do something
});

范例

This example logs the KeyboardEvent.code value whenever you release a key.

addEventListener keyup example

<p>Focus the IFrame first (e.g. by clicking in it), then try pressing some keys.</p>
<p id="log"></p>

const log = document.getElementById('log');
document.addEventListener('keyup', logKey);
function logKey(e) {
  log.textContent += ` ${e.code}`;
}

onkeyup equivalent

document.onkeyup = logKey;

规范

规范	状态
UI Events	工作草案

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
`keyup` event	Chrome 1	Edge 12	Firefox 14	IE 9	Opera 11.6	Safari 2	WebView Android 1	Chrome Android 18	Firefox Android 14	Opera Android 12	Safari iOS 1	Samsung Internet Android 1.0

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范例

addEventListener keyup example

onkeyup equivalent

规范

浏览器兼容性

图例

另请参阅

元数据

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