ServiceWorkerContainer: controllerchange event
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2018.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
Note: This feature is available in Web Workers.
The controllerchange event of the ServiceWorkerContainer interface fires when the document's associated ServiceWorkerRegistration acquires a new active worker.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("controllerchange", (event) => { })
oncontrollerchange = (event) => { }
Event type
A generic Event.
Example
js
navigator.serviceWorker.addEventListener("controllerchange", () => {
console.log("The controller of current browsing context has changed.");
});
Specifications
| Specification |
|---|
| Service Workers # dom-serviceworkercontainer-oncontrollerchange |