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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.
| Bubbles | No |
|---|---|
| Cancelable | No |
| Interface | Event |
| Event handler property | ononline |
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 | Status |
|---|---|
| HTML Living Standard The definition of 'online event' in that specification. |
Living Standard |
Browser compatibility
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
online event | Chrome Full support Yes | Edge Full support Yes | Firefox Full support Yes | IE Full support Yes | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support