This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The key property of the StorageEvent interface returns the key for the storage item that was changed.
A string containing the key for the storage item that was changed.
| Specification |
|---|
| HTML> # dom-storageevent-key-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 | |
key |
1 | 12 | 13 | ≤12.1 | 4 | 18 | 14 | ≤12.1 | 3 | 1.0 | 4.4 | 3 |
© 2005–2025 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/StorageEvent/key