Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The onchange EventHandler of the CookieStore interface fires when a change is made to any cookie.
CookieStore.onchange = function() { ... } CookieStore.addEventListener('change', function() { ... })
In this example we listen for changes using the onchange event handler.
cookieStore.onchange = function() { console.log('1 change event'); };
In this example we listen for changes using addEventListener().
cookieStore.addEventListener('change', (event) => { console.log('1 change event'); });
| Specification | 
|---|
| Cookie Store API  # dom-cookiestore-onchange  | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
onchange | 
87  | 
87  | 
No  | 
No  | 
73  | 
No  | 
87  | 
87  | 
No  | 
62  | 
No  | 
14.0  | 
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    https://developer.mozilla.org/en-US/docs/Web/API/CookieStore/onchange