CookieStore: change event

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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

A change event is fired at a CookieStore object when a change is made to any cookie.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

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

cookieStore.onchange = (event) => { }

Event type

A CookieChangeEvent. Inherits from Event.

Event CookieChangeEvent

Examples

To be informed when a cookie has changed, you can add a handler to the cookieStore instance using addEventListener(), like this:

js
cookieStore.addEventListener("change", (event) => {
  console.log("1 change event");
});

Alternatively, you can use the onchange event handler property to establish a handler for the change event:

js
cookieStore.onchange = (event) => {
  console.log("1 change event");
};

Specifications

Specification
Cookie Store API
# intro-monitor
Cookie Store API
# dom-cookiestore-onchange

Browser compatibility

BCD tables only load in the browser