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; andfalse
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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
altKey | Chrome Full support 22 | Edge Full support ≤18 | Firefox
Full support
52
| IE No support No | Opera Full support Yes | Safari No support No | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 6 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support