W3cubDocs

/Web APIs

KeyboardEvent: ctrlKey property

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.

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

© 2005–2023 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/ctrlKey