Window: offline event - Web APIs 编辑

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.

Examples

// 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

Browser compatibility

BCD tables only load in the browser

See also

• online