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 # handler-window-onoffline |
Browser compatibility
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