localStorage and sessionStorage

The localStorage and sessionStorage APIs store data as key-value pairs. While localStorage persists across sessions, sessionStorage data is discarded when the page is closed.

Baseline Status: Achieved Widely Available on Jan 29, 2018 (Cross-browser Newly Available since Jul 29, 2015).

Desktop Browser Engine Support

Google Chrome

4

Supported

Mozilla Firefox

3.5

Supported

Apple Safari

4

Supported

Microsoft Edge

12

Supported

Mobile Browser Engine Support

Chrome Android

18

Firefox Android

6

Safari iOS

3.2

Specifications and References

Specification ↗ Can I Use (namevalue-storage) ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.Storage ↗ api.Storage.clear ↗ api.Storage.getItem ↗ api.Storage.key ↗ api.Storage.length ↗ api.Storage.removeItem ↗ api.Storage.setItem ↗ api.StorageEvent ↗ api.StorageEvent.StorageEvent ↗ api.StorageEvent.key ↗ api.StorageEvent.newValue ↗ api.StorageEvent.oldValue ↗ api.StorageEvent.storageArea ↗ api.StorageEvent.url ↗ api.Window.localStorage ↗ api.Window.sessionStorage ↗ api.Window.storage_event ↗