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/DOM

MouseEvent.ctrlKey

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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes Yes Yes Yes Yes Yes
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? ? Yes ? ? ? ?

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/ctrlKey