How to check if the caps lock is on in Javascript?

Harish Kumar · · 2053 Views

To detect if the caps lock is on, use the getModifierState() method for the KeyboardEvent object:

const capslockIsOn = event.getModifierState(modifier);

The getModifierState() method returns true if a modifier is active; else, it returns false. So, event.getModifierState('CapsLock') can be used to detect if the caps lock is on.

The following snippet is example to detect if the caps lock is on.

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