StorageEvent

BaselineWidely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

TheStorageEvent interface is implemented by thestorage event, which issent to a windowwhen a storage area the window has access to is changed within the context of another document.

Constructor

StorageEvent(): Returns a newly constructedStorageEvent object.

Instance properties

In addition to the properties listed below, this interface inherits the properties of its parent interface,Event.

keyRead only: Returns a string with the key for the storage item that was changed.Thekey attribute isnull when the change is caused by the storageclear() method.
newValueRead only: Returns a string with the new value of the storage item that was changed.This value isnull when the change has been invoked by storageclear() method,or the storage item has been removed from the storage.
oldValueRead only: Returns a string with the original value of the storage item that was changed.This value isnull when the storage item has been newly addedand therefore doesn't have any previous value.
storageAreaRead only: Returns aStorage object that represents the storage object that was affected.
urlRead only: Returns string with the URL of the document whose storage changed.