The onstorage property of the WindowEventHandlers mixin is an EventHandler for processing storage events.
The storage event fires when a storage area has been changed in the context of another document.
Syntax
window.onstorage = functionRef;
Value
functionRef is a function name or a function expression. This function receives a StorageEvent as its sole argument.
Example
This example logs the value for a storage key whenever it changes in another document.
window.onstorage = function(e) {
console.log('The ' + e.key +
' key has been changed from ' + e.oldValue +
' to ' + e.newValue + '.');
};
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'onstorage' in that specification. |
Living Standard |
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome ? | Edge Full support Yes | Firefox Full support 45 | IE ? | Opera ? | Safari ? | WebView Android No support No | Chrome Android No support No | Edge Mobile Full support Yes | Firefox Android Full support 45 | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
See also
storageevent