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 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 box mode is persistent, and false
otherwise.
Syntax
navigator.storage.persist().then(function(persistent) { ... })
Parameters
None.
Return value
A Promise
that resolves to a Boolean
.
Example
if (navigator.storage && navigator.storage.persist) navigator.storage.persist().then(function(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 | Status | Comment |
---|---|---|
Storage The definition of 'persist' in that specification. |
Living Standard | Initial definition. |
Browser Compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
persist | Chrome
Full support
52
| Edge Full support ≤79 | Firefox Full support 55 | IE ? | Opera Full support Yes | Safari ? | WebView Android
Full support
52
| Chrome Android
Full support
52
| Firefox Android Full support 55 | Opera Android Full support Yes | Safari iOS ? | Samsung Internet Android
Full support
6.0
|
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- Uses a non-standard name.
- Uses a non-standard name.