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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
altKey
|
Chrome
Full support 22 |
Edge
Full support ≤18 |
Firefox Full support 52 Full support 52 No support 18 — 24 |
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
TouchEvent.altKey by Mozilla Contributors is licensed under CC-BY-SA 2.5.