HTMLElement: beforeinput event

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The DOM beforeinput event fires when the value of an <input>, <select>, or <textarea> element is about to be modified. The event also applies to elements with contenteditable enabled, and to any element when designMode is turned on.

In the case of contenteditable and designMode, the event target is the editing host. If these properties apply to multiple elements, the editing host is the nearest ancestor element whose parent isn't editable.

Bubbles Yes
Cancelable Yes
Interface InputEvent
Event handler property None
Sync / Async Sync
Composed Yes
Default Action Update the DOM element

Examples

This example logs the value just before you change the value of the <input> element.

HTML

<input placeholder="Enter some text" name="name"/>
<p id="values"></p>

JavaScript

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

input.addEventListener('beforeinput', updateValue);

function updateValue(e) {
  log.textContent = e.target.value;
}

Result

Specifications

Specification Status
UI Events
The definition of 'beforeinput event' in that specification.
Working Draft

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
beforeinput event
Experimental
Chrome Full support YesEdge No support NoFirefox No support NoIE No support NoOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android No support NoOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also

Document Tags and Contributors

Contributors to this page: Watilin, chrisdavidmills, mdnwebdocs-bot, mfluehr
Last updated by: Watilin,