JavaScript MouseEvent altKey Property

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JavaScript MouseEvent altKey Property

The event.altKey property indicates whether the alt key was pressed or not when a given mouse event occurs.

Note: This property is read-only.


HTML Online Editor
<!DOCTYPE html> <html> <body> <p onmousedown="myFunction(event)">Hold 'ALT' key and click on me</p> <script> function myFunction(e){ if(e.altKey) alert("altKey was Pressed"); else alert("altKey was not Pressed"); } </script> </body> </html>



Return Value

trueIf the alt key was pressed.
falseIf the alt key was not pressed.


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