Web/API/GlobalEventHandlers/onkeyup

The onkeyup property of the GlobalEventHandlers mixin is an EventHandler that processes keyup events.

The keyup event fires when the user releases a key that was previously pressed.

Syntax

target.onkeyup = functionRef;

Value

functionRef is a function name or a function expression. The function receives a KeyboardEvent object as its sole argument.

Example

This example logs the KeyboardEvent.code value whenever you release a key inside the <input> element.

HTML

<input>
<p id="log"></p>

JavaScript

const input = document.querySelector('input');
const log = document.getElementById('log');

input.onkeyup = logKey;

function logKey(e) {
  log.textContent += ` ${e.code}`;
}

Result

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'onkeyup' in that specification.	Living Standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`onkeyup`	Chrome Full support Yes	Edge Full support ≤18	Firefox Full support Yes	IE ?	Opera ?	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support: Full support
Compatibility unknown: Compatibility unknown

Compatibility notes

Since Firefox 65, the keyup and keydown 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 even that has been processed by an IME):

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