MouseEvent: getModifierState() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨March 2019⁩.

The MouseEvent.getModifierState() method returns the current state of the specified modifier key: true if the modifier is active (i.e., the modifier key is pressed or locked), otherwise, false.

See KeyboardEvent.getModifierState() for details.

Syntax

getModifierState(key)

Parameters

key: A modifier key value. The value must be one of the KeyboardEvent.key values which represent modifier keys or "Accel" Deprecated . This is case-sensitive.