StorageManager

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

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

Methods

StorageManager.estimate() Secure context
Returns a Promise that resolves to a StorageEstimate object containing usage and quota numbers for your origin.
StorageManager.persist() Secure context
Returns a Promise that resolves to true if the user agent is able to persist your site's storage.
StorageManager.persisted() Secure context
Returns a Promise that resolves to true if persistence has already been granted for your site's storage.

Specifications

Specification Status Comment
Storage
The definition of 'StorageManger' in that specification.
Living Standard Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
StorageManagerChrome Full support 48Edge Full support ≤79Firefox Full support 57
Full support 57
No support 51 — 57
Notes Disabled
Notes See bug 1304966 and bug 1399038.
Disabled From version 51 until version 57 (exclusive): this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE No support NoOpera Full support YesSafari ? WebView Android Full support 48Chrome Android Full support 48Firefox Android Full support 51
Notes Disabled
Full support 51
Notes Disabled
Notes See bug 1304966 and bug 1399038.
Disabled From version 51: this feature is behind the dom.storageManager.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 5.0
estimateChrome Full support 52Edge Full support ≤79Firefox Full support 51IE No support NoOpera Full support YesSafari ? WebView Android Full support 52Chrome Android Full support 52Firefox Android Full support 51Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 6.0
persistChrome Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: requestPersistent
Edge Full support ≤79Firefox Full support 55IE No support NoOpera Full support YesSafari ? WebView Android Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: requestPersistent
Chrome Android Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: requestPersistent
Firefox Android Full support 55Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 6.0
Full support 6.0
No support 5.0 — 6.0
Alternate Name
Alternate Name Uses the non-standard name: requestPersistent
persistedChrome Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: persistentPermission
Edge Full support ≤79Firefox Full support 55IE No support NoOpera Full support YesSafari ? WebView Android Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: persistentPermission
Chrome Android Full support 52
Full support 52
No support 48 — 52
Alternate Name
Alternate Name Uses the non-standard name: persistentPermission
Firefox Android Full support 55Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support 6.0
Full support 6.0
No support 5.0 — 6.0
Alternate Name
Alternate Name Uses the non-standard name: persistentPermission

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.
Uses a non-standard name.
Uses a non-standard name.