Window: offline event
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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
.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("offline", (event) => {});
onoffline = (event) => {};
Event type
A generic Event
.
Event handler aliases
In addition to the Window
interface, the event handler property onoffline
is also available on the following targets:
Examples
js
// 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 |
---|
HTML # event-offline |
HTML # handler-window-onoffline |
Browser compatibility
Report problems with this compatibility data on GitHubdesktop | mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
offline event |
Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.