NavigatorOnLine

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.

特性

NavigatorOnLine interface doesn't inherit any property.

NavigatorOnLine.onLine 只读
返回 Boolean indicating whether the browser is working online.

方法

NavigatorOnLine interface neither implements, nor inherit any method.

规范

规范 状态
HTML Living Standard
The definition of 'NavigatorOnLine' in that specification.
实时标准

浏览器兼容性

更新 GitHub 上的兼容性数据
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 1 Edge 12 Firefox 3.5 IE 8 Opera 3 Safari 5 WebView Android 1 Chrome Android 18 Firefox Android 4 Opera Android 10.1 Safari iOS 4.2 Samsung Internet Android 1.0
onLine Chrome 1
1
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 12 Firefox 3.5
3.5
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 8
8
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 3
3
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 5 WebView Android 1
1
Faulty in a WebView component, see Issue bug 16760 .
Chrome Android 18 Firefox Android 4 Opera Android 10.1
10.1
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 4.2 Samsung Internet Android 1.0
Available in workers Chrome ? Edge ? Firefox 29 IE ? Opera ? Safari ? WebView Android ? Chrome Android 29 Firefox Android 35 Opera Android ? Safari iOS ? Samsung Internet Android 2.0

图例

完整支持
完整支持
兼容性未知
兼容性未知
见实现注意事项。

另请参阅

  1. NavigatorOnLine
  2. 特性
    1. onLine
  3. 实现通过:
    1. Navigator
    2. WorkerNavigator
  4. Related pages for HTML DOM
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    2. DOMStringMap
    3. ErrorEvent
    4. GlobalEventHandlers
    5. HTMLAnchorElement
    6. HTMLAreaElement
    7. HTMLAudioElement
    8. HTMLBRElement
    9. HTMLBaseElement
    10. HTMLBaseFontElement
    11. HTMLBodyElement
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