ServiceWorker: error event

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 error event fires whenever an error occurs in the service worker.

Syntax

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

js
addEventListener("error", (event) => {});

onerror = (event) => {};

Event type

A generic Event.

Example

The following code snippet gets a handle to the ServiceWorker object via ServiceWorkerRegistration.active and sets up an onerror handler on the resulting object:

js
// in the page being controlled
if (navigator.serviceWorker) {
  navigator.serviceWorker.register("service-worker.js");

  navigator.serviceWorker.ready.then((registration) => {
    registration.active.onerror = (event) => {
      console.log("An error occurred in the service worker!");
    };
  });
}

Specifications

Specification
HTML
# handler-abstractworker-onerror

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
error event

Legend

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Full support
Full support
No support
No support