MDN’s new design is in Beta! A sneak peek:

This API is available on Firefox OS for internal applications only.


The closed property indicates whether or not the settings lock is closed.


var isClosed = instanceOfSettingsLock.closed;


Returns a Boolean indicating the state of the settings lock; if true, the lock is no longer active. If false, the lock is still the active lock.


Not part of any specification yet; however, this API will be discussed at W3C as part of the System Applications Working Group.

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, teoli, MHasan, kscarfone, Sheppy, Jeremie
 Last updated by: chrisdavidmills,