This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The newValue property of the StorageEvent interface returns the new value of the storage item whose value was changed.
A string containing the new value of the storage item.
| Specification |
|---|
| HTML> # dom-storageevent-newvalue-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 | |
newValue |
1 | 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/newValue