PageTransitionEvent
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
Page transition events fire when a webpage is being loaded or unloaded.
当网页在加载完成或卸载后会触发页面传输事件（Page transition events）。
DOM Information
Inheritance Hierarchy
EventPageTransitionEvent
Example
HTML
html
<!doctype html>
<html>
<body onpageshow="myFunction(event)"></body>
</html>
JavaScript
js
function myFunction(event) {
if (event.persisted) {
alert("The page was cached by the browser");
} else {
alert("The page was NOT cached by the browser");
}
}
Members
The PageTransitionEvent object has these types of members:
- Properties
Properties
The PageTransitionEvent object has these properties.
| Property | Access type | Description |
|---|---|---|
| persisted | 只读 | 标记页面是否从缓存（Backforward Cache）中加载 |