The KeyboardEvent.ctrlKey read-only property returns a boolean value that indicates if the control key was pressed (true) or not (false) when the event occurred.
KeyboardEvent: ctrlKey property
Value
A boolean value.
Examples
html
<html lang="en">
<head>
<title>ctrlKey example</title>
<script>
function showChar(e) {
alert(`Key Pressed: ${e.key}\nCTRL 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 |
|---|
| UI Events # dom-keyboardevent-ctrlkey |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
ctrlKey |
1 | 12 | 1.5 | 9 | ≤12.1 | 1.2 | ≤37 | 18 | 4 | ≤12.1 | 1 | 1.0 |
See also
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https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/ctrlKey