Find out whether or not the "ALT" key was pressed when a mouse button is clicked:
The altKey property returns a Boolean value that indicates whether or not the "ALT" key was pressed when a mouse event was triggered.
Note: On some Mac keyboards, the "ALT" key is displayed as "Option" or "Opt".
Note: This property is read-only.
Property | |||||
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altKey | Yes | Yes | Yes | Yes | Yes |
Return Value: |
A Boolean, indicating whether the "ALT" key was pressed when the mouse event occured.
Possible values:
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DOM Version: | DOM Level 2 Events |
HTML DOM reference: MouseEvent ctrlKey Property
HTML DOM reference: MouseEvent metaKey Property
HTML DOM reference: MouseEvent shiftKey Property