Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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
StorageEstimateobject containing usage and quota numbers for your origin. StorageManager.persist()Secure context- Returns a
Promisethat resolves totrueif the user agent is able to persist your site's storage. StorageManager.persisted()Secure context- Returns a
Promisethat resolves totrueif persistence has already been granted for your site's storage.
| Specification | Status | Comment |
|---|---|---|
| Storage The definition of 'StorageManger' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Microsoft Edge | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 55.0 | 51 (51)[1] | ? | ? | 42 | ? |
estimate() |
61.0 | 51 (51)[1] | ||||
persist() and persisted() |
55.0 | 55 (55)[2] |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | 55.0 | 51.0 (51)[1] | ? | 42 | ? | 55.0 |
estimate() |
61.0 | 61.0 | |||||
persist() and persisted() |
55.0 | 55.0 |
[1] Firefox 51 introduced NavigatorStorage, navigator.storage, and the StorageManager.estimate() method. These are enabled by default in nightly builds but disabled by default in all other builds. You can enable these features by setting the preference dom.storageManager.enabled to true.
[2] Firefox 55 introduced StorageManager.persist() and StorageManager.persisted() methods. Users can also manage persistent-storage data in Preferences "Privacy and Security" -> "Site data". These are enabled by default in nightly builds but disabled by default in all other builds. You can enable these features by setting the preference dom.storageManager.enabled and browser.storageManager.enabled to true.