WorkerGlobalScope: offline event

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 Standard # handler-workerglobalscope-onoffline

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