KeyboardEvent getModifierState() Method

Is the Caps Lock key activated?

var x = event.getModifierState("CapsLock");

Description

The getModifierState() method returns true if the specified modifier key was pressed, or activated.

Modifier keys that are activated only when they are being pressed down:

Modifier keys that are activated when they are clicked, and deactivated when they are clicked again:

The numbers in the table specify the first browser version that fully supports the method.

Method
getModifierState()	30	9.0	15	10.1	17

event.getModifierState(modifierKey)

Parameter	Description
modifierKey	The key to check if is activated or not. Legal Values: "Alt" "AltGraph" "CapsLock" "Control" "Meta" "NumLock" "ScrollLock" "Shift"

Return Value:	A Boolean, true if the specified modifier key is activated, otherwise false.
DOM Version:	DOM Level 3 Events

Is the shift key breing pressed down?

var x = event.getModifierState("Shift");