dom / latest / window / online_event.html /

Window: online event

The online event of the Window interface is fired when the browser has gained access to the network and the value of Navigator.onLine switches to true.

Note: This event shouldn't be used to determine the availability of a particular website. Network problems or firewalls might still prevent the website from being reached.

Syntax

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

addEventListener('online', event => { });
ononline = event => { };

Event type

A generic Event.

Event handler aliases

In addition to the Window interface, the event handler property ononline is also available on the following targets:

Examples

// addEventListener version
window.addEventListener('online', (event) => {
    console.log("You are now connected to the network.");
});

// ononline version
window.ononline = (event) => {
  console.log("You are now connected to the network.");
};

Specifications

Specification
HTML Standard
# event-online

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
online_event
3
12
9
9
15
4
≤37
18
9
14
3
1.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Window/online_event

Name Web APIs
Version
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Last Updated 2022-04-27T09:33:08Z