The MouseEvent.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 = instanceOfMouseEvent.ctrlKey

Return value

A boolean

Example

<html>
<head>
<title>ctrlKey example</title>

<script type="text/javascript">
document.addEventListener('click', function(e) {
  console.log('Is Control key pressed?', e.ctrlKey);
})
</script>
</head>

<body>
<p>
Click anywhere on the page and open your developer console to see the results.
</p>
</body>
</html>

Specifications

Specification Status Comment
Document Object Model (DOM) Level 3 Events Specification
The definition of 'MouseEvent.ctrlKey' in that specification.
Obsolete No change from Document Object Model (DOM) Level 2 Events Specification.
Document Object Model (DOM) Level 2 Events Specification
The definition of 'MouseEvent.ctrlKey' in that specification.
Obsolete Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes Yes Yes Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? Yes ? ? ? ?

See also

Document Tags and Contributors

Contributors to this page: janzenz, fscholz, libbymc, teoli, amycb, Jeremie
Last updated by: janzenz,