This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The storageArea property of the StorageEvent interface returns the storage object that was affected.
A Storage object that represents the storage object that was affected.
| Specification |
|---|
| HTML> # dom-storageevent-storagearea-dev> |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | WebView on iOS | |
storageArea |
3 | 12 | 13 | ≤12.1 | 4 | 18 | 14 | ≤12.1 | 3 | 1.0 | 4.4 | 3 |
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https://developer.mozilla.org/en-US/docs/Web/API/StorageEvent/storageArea