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: " + String.fromCharCode(e.charCode) + "\n" + "charCode: " + e.charCode + "\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 Specification The definition of 'KeyboardEvent.ctrlKey' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
Feature | Edge | Firefox (Gecko) | Chrome | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Edge | Firefox Mobile (Gecko) | Android | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | ? | ? | ? | ? | ? |