Onze vrijwilligers hebben dit artikel nog niet naar het Nederlands vertaald. Doe mee en help de klus te klaren!
U kunt het artikel ook in het English (US) lezen.

The onscroll property of the GlobalEventHandlers mixin is an EventHandler that processes scroll events.

The scroll event fires when the user scrolls an item's contents.

Note: Don't confuse onscroll with onwheel: onwheel handles general wheel rotation, while onscroll handles scrolling of an object's content.

Syntax

target.onscroll = functionRef;

Value

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

Only one onscroll handler can be assigned to an object at a time. For greater flexibility, you can pass a scroll event to the EventTarget.addEventListener() method instead.

Example

This example monitors scrolling on a <textarea>, and logs the element's vertical scroll position accordingly.

HTML

<textarea>1 2 3 4 5 6 7 8 9</textarea>
<p id="log"></p>

CSS

textarea {
  width: 4rem;
  height: 8rem;
  font-size: 3rem;
}

JavaScript

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

textarea.onscroll = logScroll;

function logScroll(e) {
  log.textContent = `Scroll position: ${e.target.scrollTop}`;
}

Result

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'onscroll' in that specification.
Living Standard  
Document Object Model (DOM) Level 3 Events Specification
The definition of 'onscroll' in that specification.
Obsolete Initial definition

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support YesEdge Full support YesFirefox Full support YesIE ? Opera ? Safari ? WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

Documentlabels en -medewerkers

Laatst bijgewerkt door: mfluehr,