StorageEvent: StorageEvent() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨April 2018⁩.

The StorageEvent() constructor creates a new StorageEvent object.

Syntax

new StorageEvent(type)
new StorageEvent(type, options)

A string with the name of the type of the StorageEvent. It is case-sensitive and browsers set it to storage.

An object that, in addition of the properties defined in Event(), has the following properties:

key Optional: A string that represents the key for the storage item that changed. Defaults to null.
oldValue Optional: A string containing the original value of the storage item. Defaults to null.
newValue Optional: A string with the new value of the key. Defaults to null.
url: A string with the URL of the document whose storage changed.
storageArea Optional: A Storage object that represents the storage that was affected. Defaults to null.