Web/API/NavigatorOnLine

From Get docs

The NavigatorOnLine interface contains methods and properties related to the connectivity status of the browser.

There is no object of type NavigatorOnLine, but other interfaces, like Navigator or WorkerNavigator, implement it.

Properties

The NavigatorOnLine interface doesn't inherit any property.

NavigatorOnLine.onLine Read only
Returns a Boolean indicating whether the browser is working online.

Methods

The NavigatorOnLine interface neither implements, nor inherit any method.

Specifications

Specification Status
HTML Living StandardThe definition of 'NavigatorOnLine' in that specification. Living Standard

Browser compatibility

Update compatibility data on GitHub

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
NavigatorOnLine Chrome

Full support 1

Edge

Full support 12

Firefox

Full support 3.5

IE

Full support 8

Opera

Full support 3

Safari

Full support 5

WebView Android

Full support 1

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android

Full support 10.1

Safari iOS

Full support 4.2

Samsung Internet Android

Full support 1.0

onLine

Chrome Full support 1

Notes'

Full support 1

Notes'

Notes' Earlier versions of Chrome incorrectly return true when a tab is first opened, but it starts reporting the correct connectivity status after the first network event. Windows: 11, Mac: 14, Chrome OS: 13, Linux: Always returns true. For history, see crbug.com/7469.

Edge

Full support 12

Firefox Full support 3.5

Notes'

Full support 3.5

Notes'

Notes' Since Firefox 4 the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity. Since Firefox 41, on OS X and Windows, the returned values follow the actual network connectivity, unless 'Work offline' mode is selected (where it will always return false).

IE Full support 8

Notes'

Full support 8

Notes'

Notes' in Internet Explorer 8 'online' and 'offline' events are raised on the document.body; under IE 9 they are raised on both document.body and window.

Opera Full support 3

Notes'

Full support 3

Notes'

Notes' From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.

Safari

Full support 5

WebView Android Full support 1

Notes'

Full support 1

Notes'

Notes' Faulty in a WebView component, see Issue bug 16760.

Chrome Android

Full support 18

Firefox Android

Full support 4

Opera Android Full support 10.1

Notes'

Full support 10.1

Notes'

Notes' From Opera 11.1 until Opera 12.1, the browser returns true when 'Work Offline' mode is disabled and false when it is enabled, regardless of actual connectivity.

Safari iOS

Full support 4.2

Samsung Internet Android

Full support 1.0

Available in workers Chrome

?

Edge

?

Firefox

Full support 29

IE

?

Opera

?

Safari

?

WebView Android

?

Chrome Android

Full support 29

Firefox Android

Full support 35

Opera Android

?

Safari iOS

?

Samsung Internet Android

Full support 2.0

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.'
See implementation notes.


See also