The KeyboardEvent.ctrlKey read-only property returns a Boolean that indicates if the control key was pressed (true) or not (false) when the event occured.
Syntax
var ctrlKeyPressed = instanceOfKeyboardEvent.ctrlKey
Return value
A Boolean
Example
<html>
<head>
<title>ctrlKey example</title>
<script type="text/javascript">
function showChar(e){
alert(
"Key Pressed: " + e.key + "\n"
+ "CTRL key pressed: " + e.ctrlKey + "\n"
);
}
</script>
</head>
<body onkeypress="showChar(event);">
<p>Press any character key, with or without holding down the CTRL key.<br />
You can also use the SHIFT key together with the CTRL key.</p>
</body>
</html>Specifications
| Specification | Status | Comment |
| Document Object Model (DOM) Level 3 Events SpecificationThe definition of 'KeyboardEvent.ctrlKey' in that specification. | Obsolete | 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ctrlKey
|
Chrome
Full support Yes |
Edge
Full support 12 |
Firefox
Full support Yes |
IE
Full support Yes |
Opera
Full support Yes |
Safari
Full support Yes |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support Yes |
Opera Android
Full support Yes |
Safari iOS
Full support Yes |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
See also
KeyboardEvent.ctrlKey by Mozilla Contributors is licensed under CC-BY-SA 2.5.
