StorageManager: persisted() method
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.
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 persisted() method of the StorageManager interface returns a Promise that resolves to true if your site's storage bucket is persistent.
Syntax
js
persisted() Parameters
None.
Return value
Exceptions
TypeError-
Thrown if obtaining a local storage shelf failed. For example, if the current origin is an opaque origin or if the user has disabled storage.
Example
js
if (navigator.storage && navigator.storage.persist) { navigator.storage.persisted().then((persistent) => { if (persistent) { console.log("Storage will not be cleared except by explicit user action"); } else { console.log("Storage may be cleared by the UA under storage pressure."); } }); } Specifications
| Specification |
|---|
| Storage # dom-storagemanager-persisted |
Browser compatibility
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