TouchEvent.altKey

Summary

A Boolean value indicating whether or not the alt (Alternate) key is enabled when the touch event is created. If the alt key is enabled, the attribute's value is true. Otherwise, it is false.

This property is Read only .

Syntax

var altEnabled = touchEvent.altKey;

Return value

altEnabled
true if the alt key is enabled for this event; and false if the alt is not enabled.

Example

This example illustrates how to access the TouchEvent key modifier properties: TouchEvent.altKey, TouchEvent.ctrlKey, TouchEvent.metaKey and TouchEvent.shiftKey.

In following code snippet, the touchstart event handler logs the state of the event's modifier keys.

someElement.addEventListener('touchstart', function(e) {
   // Log the state of this event's modifier keys
   console.log("altKey = " + e.altKey);
   console.log("ctrlKey = " + e.ctrlKey);
   console.log("metaKey = " + e.metaKey);
   console.log("shiftKey = " + e.shiftKey);
}, false);

Specifications

Specification Status Comment
Touch Events – Level 2 Draft Non-stable version.
Touch Events Recommendation 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 22Edge Full support YesFirefox Full support 52
Full support 52
No support 18 — 24
IE No support NoOpera Full support YesSafari No support NoWebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support 6Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

Document Tags and Contributors

Contributors to this page: fscholz, erikadoyle, chrisdavidmills, rolfedh, AFBarstow
Last updated by: fscholz,