Package-level declarations

The StorageEvent interface is implemented by the Window/storage_event event, which is sent to a window when a storage area the window has access to is changed within the context of another document.

MDN Reference

The StorageManager interface of the Storage API provides an interface for managing persistence permissions and estimating available storage. Available only in secure contexts.

The estimate() method of the StorageManager interface asks the Storage Manager for how much storage the current origin takes up (usage), and how much space is available (quota).

The getDirectory() method of the StorageManager interface is used to obtain a reference to a FileSystemDirectoryHandle object allowing access to a directory and its contents, stored in the origin private file system (OPFS).

The persist() method of the StorageManager interface requests permission to use persistent storage, and returns a Promise that resolves to true if permission is granted and bucket mode is persistent, and false otherwise.

The persisted() method of the StorageManager interface returns a Promise that resolves to true if your site's storage bucket is persistent.