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
HTML Standard
# handler-window-ononline

Browser compatibility

BCD tables only load in the browser

See also