Keyboard: lock() method

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The lock() method of the Keyboard interface returns a Promise after enabling the capture of keypresses for any or all of the keys on the physical keyboard. This method can only capture keys that are granted access by the underlying operating system.




keyCodes Optional

An Array of one or more key codes to lock. If no keycodes are provided all keys will be locked. A list of valid code values is found in the UI Events KeyboardEvent code Values spec.

Return value


Transient user activation is required. The user has to interact with the page or a UI element in order for this feature to work.


Capturing all keys

The following example captures all keypresses.


Capturing specific keys

The following example captures the "W", "A", "S", and "D" keys. It captures these keys regardless of which modifiers are used with the key press. Assuming a standard US QWERTY layout, registering "KeyW" ensures that "W", Shift+"W", Control+"W", Control+Shift+"W", and all other key modifier combinations with "W" are sent to the app. The same applies to for "KeyA", "KeyS" and "KeyD".

navigator.keyboard.lock(["KeyW", "KeyA", "KeyS", "KeyD"]);


Keyboard Lock
# h-keyboard-lock

Browser compatibility

BCD tables only load in the browser