CookieChangeEvent

Baseline 2025
Newly available

Since June 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The CookieChangeEvent interface of the Cookie Store API is the event type of the change event fired at a CookieStore when any cookies are created or deleted.

Note: A cookie that is replaced due to the insertion of another cookie with the same name, domain, and path, is ignored and does not trigger a change event.

Event CookieChangeEvent

Constructor

CookieChangeEvent()

Creates a new CookieChangeEvent.

Instance properties

This interface also inherits properties from Event.

CookieChangeEvent.changed Read only

An array listing all newly-created cookies. Note that this will exclude cookies which were created with an expiry date in the past, as these cookies are immediately deleted.

CookieChangeEvent.deleted Read only

An array listing all cookies which were removed, either because they expired or because they were explicitly deleted. Note that this will include cookies which were created with an expiry date in the past.

Instance methods

This interface also inherits methods from Event.

Examples

In this example when the cookie is set, the event listener logs the event to the console. This is a CookieChangeEvent object with the changed property containing an object representing the cookie that has just been set.

js
cookieStore.addEventListener("change", (event) => {
  console.log(event);
});

const oneDay = 24 * 60 * 60 * 1000;
cookieStore.set({
  name: "cookie1",
  value: "cookie1-value",
  expires: Date.now() + oneDay,
  domain: "example.com",
});

Specifications

Specification
Cookie Store API
# CookieChangeEvent

Browser compatibility

desktop mobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
CookieChangeEvent
Chrome – Full support
Chrome 87 (Release date: 2020-11-17)
footnote Full support
Edge – Full support
Edge 87 (Release date: 2020-11-19)
footnote Full support
Firefox – Full support
Firefox 140 (Release date: 2025-06-24)
footnote Full support
Opera – Full support
Opera 73 (Release date: 2020-12-09)
footnote Full support
Safari – Full support
Safari 18.4 (Release date: 2025-03-31)
footnote Full support
Chrome Android – Full support
Chrome Android 87 (Release date: 2020-11-17)
footnote Full support
Firefox for Android – Full support
Firefox for Android 140 (Release date: 2025-06-24)
footnote Full support
Opera Android – Full support
Opera Android 62 (Release date: 2021-02-16)
footnote Full support
Safari on iOS – Full support
Safari on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 87 (Release date: 2020-11-17)
footnote Full support
WebView on iOS – Full support
WebView on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
CookieChangeEvent() constructor
Chrome – Full support
Chrome 87 (Release date: 2020-11-17)
footnote Full support
Edge – Full support
Edge 87 (Release date: 2020-11-19)
footnote Full support
Firefox – Full support
Firefox 140 (Release date: 2025-06-24)
footnote Full support
Opera – Full support
Opera 73 (Release date: 2020-12-09)
footnote Full support
Safari – Full support
Safari 18.4 (Release date: 2025-03-31)
footnote Full support
Chrome Android – Full support
Chrome Android 87 (Release date: 2020-11-17)
footnote Full support
Firefox for Android – Full support
Firefox for Android 140 (Release date: 2025-06-24)
footnote Full support
Opera Android – Full support
Opera Android 62 (Release date: 2021-02-16)
footnote Full support
Safari on iOS – Full support
Safari on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 87 (Release date: 2020-11-17)
footnote Full support
WebView on iOS – Full support
WebView on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
changed
Chrome – Full support
Chrome 87 (Release date: 2020-11-17)
footnote Full support
Edge – Full support
Edge 87 (Release date: 2020-11-19)
footnote Full support
Firefox – Full support
Firefox 140 (Release date: 2025-06-24)
footnote Full support
Opera – Full support
Opera 73 (Release date: 2020-12-09)
footnote Full support
Safari – Full support
Safari 18.4 (Release date: 2025-03-31)
footnote Full support
Chrome Android – Full support
Chrome Android 87 (Release date: 2020-11-17)
footnote Full support
Firefox for Android – Full support
Firefox for Android 140 (Release date: 2025-06-24)
footnote Full support
Opera Android – Full support
Opera Android 62 (Release date: 2021-02-16)
footnote Full support
Safari on iOS – Full support
Safari on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 87 (Release date: 2020-11-17)
footnote Full support
WebView on iOS – Full support
WebView on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
deleted
Chrome – Full support
Chrome 87 (Release date: 2020-11-17)
footnote Full support
Edge – Full support
Edge 87 (Release date: 2020-11-19)
footnote Full support
Firefox – Full support
Firefox 140 (Release date: 2025-06-24)
footnote Full support
Opera – Full support
Opera 73 (Release date: 2020-12-09)
footnote Full support
Safari – Full support
Safari 18.4 (Release date: 2025-03-31)
footnote Full support
Chrome Android – Full support
Chrome Android 87 (Release date: 2020-11-17)
footnote Full support
Firefox for Android – Full support
Firefox for Android 140 (Release date: 2025-06-24)
footnote Full support
Opera Android – Full support
Opera Android 62 (Release date: 2021-02-16)
footnote Full support
Safari on iOS – Full support
Safari on iOS 18.4 (Release date: 2025-03-31)
footnote Full support
Samsung Internet – Full support
Samsung Internet 14 (Release date: 2021-04-17)
footnote Full support
WebView Android – Full support
WebView Android 87 (Release date: 2020-11-17)
footnote Full support
WebView on iOS – Full support
WebView on iOS 18.4 (Release date: 2025-03-31)
footnote Full support

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support