当浏览器失去网络连接时，offline事件被触发。并且navigator.onLine的值变为 false。
General info
- Specification
- HTML5 Offline
- Interface
- Event
- Bubbles
- No
- Cancelable
- No
- Target
- DefaultView (
<window>) - Default Action
- None
Properties
| Property | Type | Description |
|---|---|---|
target 只读 |
EventTarget |
The event target (the topmost target in the DOM tree). |
type 只读 |
DOMString |
The type of event. |
bubbles 只读 |
Boolean |
Whether the event normally bubbles or not |
cancelable 只读 |
Boolean |
Whether the event is cancellable or not? |