Javascript | MouseEvent altKey Property
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.
Syntax:
event.altKey
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
Example :
<!DOCTYPE html> < html > < head > < title >JavaScript Mouse Event</ title > </ head > < body style = "text-align:center;" > < h1 style = "color:green;" > GeeksforGeeks </ h1 > < h2 > mouseEvent shiftKey Property </ h2 > < button onclick = "geek (event);" >Get Alt key state!</ button > < script > function geek (event) { if (event.altKey) { alert ("Alt key is pressed."); } else { alert ("Alt key is not pressed."); } } </ script > </ body > </ html > |
Output:
Clicking button (Alt key is not pressed):
Clicking button (Alt key is pressed):
Supported Browsers: The browser supported by altkey property are listed below:
- Apple Safari
- Google Chrome
- Firefox
- Opera
- Internet Explorer
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- HTML | DOM MouseEvent clientX Property
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