The mouseEvent altKey property is used to define whether the alt key is pressed or not. It is a boolean value. When alt key is pressed then onclick of the mouse buttons it returns true and if it is not pressed then it returns false.
Return Value: It returns a boolean value indicating whether alt key is pressed or not.
- true: it indicates alt key is pressed
- false: it indicates alt key is not pressed
Clicking button (Alt key is not pressed):
Clicking button (Alt key is pressed):
Supported Browsers: The browser supported by mouseEvent altKey Property are listed below:
- Apple Safari
- Google Chrome
- Internet Explorer