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 Standard The definition of 'onkeyup' in that specification. |
Living Standard |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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
});
See also
keyup
event- Related event handlers