WorkerGlobalScope: offline event

Limited availability

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

Note: This feature is only available in Web Workers.

The offline event of the WorkerGlobalScope fires when the device loses connection to the internet.

Syntax

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

addEventListener("offline", (event) => { })

onoffline = (event) => { }

A generic Event.

The following code snippet shows an onoffline handler set inside a worker:

self.onoffline = () => {
  console.log("Your worker is now offline");
};

The same snippet, but using addEventListener():

self.addEventListener("offline", () => {
  console.log("Your worker is now offline");
});

Specification
HTML # handler-workerglobalscope-onoffline