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/Web APIs

StorageManager

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨December 2021⁩.

* Some parts of this feature may have varying levels of support.

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

Note: This feature is available in Web Workers.

The StorageManager interface of the Storage API provides an interface for managing persistence permissions and estimating available storage. You can get a reference to this interface using either navigator.storage or WorkerNavigator.storage.

Instance methods

StorageManager.estimate(): Returns a Promise that resolves to an object containing usage and quota numbers for your origin.
StorageManager.getDirectory(): Used to obtain a reference to a FileSystemDirectoryHandle object allowing access to a directory and its contents, stored in the origin private file system. Returns a Promise that fulfills with a FileSystemDirectoryHandle object.
StorageManager.persist(): Returns a Promise that resolves to true if the user agent is able to persist your site's storage.
StorageManager.persisted(): Returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Specifications

Specification
Storage> # storagemanager>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`StorageManager`	55	79	57	42	15.2	55	57	42	15.2	6.0	55	15.2
`estimate`	61	79	57	48	17	61	57	45	17	8.0	61	17
`getDirectory`	86	86	111	72	15.2	109	111	74	15.2	21.0	109	15.2
`persist`	55	79	57	42	15.2	55	57	42	15.2	6.0	55	15.2
`persisted`	55	79	57	42	15.2	55	57	42	15.2	6.0	55	15.2

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https://developer.mozilla.org/en-US/docs/Web/API/StorageManager