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
.
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 Standard # event-offline |
HTML Standard # handler-window-onoffline |
Browser compatibility
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