Web/API/Window/offline event

The offline event of the Window interface is fired when the browser has lost access to the network and the value of Navigator.onLine switches to false.

Bubbles	No
Cancelable	No
Interface	Event
Event handler property	onoffline

Examples

// addEventListener version
window.addEventListener('offline', (event) => {
    console.log("The network connection has been lost.");
});

// onoffline version
window.onoffline = (event) => {
  console.log("The network connection has been lost.");
};

Specifications

Specification	Status
HTML Living StandardThe definition of 'offline event' in that specification.	Living Standard

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
offline event	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

See also

• online

Window: offline event by Mozilla Contributors is licensed under CC-BY-SA 2.5.