IntersectionObserverEntry.intersectionRect

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句法
范例
规范
浏览器兼容性
相关话题

这是实验性技术
检查浏览器兼容性表格要小心谨慎在生产中使用这之前。

IntersectionObserverEntry interface's read-only intersectionRect 特性为 DOMRectReadOnly object which describes the smallest rectangle that contains the entire portion of the target element which is currently visible within the intersection root.

句法

var intersectionRect = IntersectionObserverEntry.intersectionRect;

值

A DOMRectReadOnly which describes the part of the target element that's currently visible within the root's intersection rectangle.

This rectangle is computed by taking the intersection of boundingClientRect with each of the target 's ancestors' clip rectangles, with the exception of the intersection root 本身。

范例

In this simple example, an intersection callback stores the intersection rectangle for later use by the code that draws the target elements' contents, so that only the visible area is redrawn.

function intersectionCallback(entries) {
  entries.forEach(function(entry) {
    refreshZones.push({
      element: entry.target,
      rect: entry.intersectionRect
    });
  });
}

规范

规范	状态	注释
Intersection Observer The definition of 'IntersectionObserverEntry.intersectionRect' in that specification.	工作草案	初始定义

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`intersectionRect`	Chrome 51	Edge 15	Firefox 55 55 不支持 53 — 55 Disabled Disabled ). To change preferences in Firefox, visit	IE No	Opera Yes	Safari ?	WebView Android 51	Chrome Android 51	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android 5.0

图例

完整支持
不支持
兼容性未知 ?
实验。期望将来行为有所改变。
用户必须明确启用此特征。

元数据

最后修改： 2019 年 3 月 23 日

交集观测器 API
IntersectionObserverEntry
特性
1. boundingClientRect
2. intersectionRatio
3. intersectionRect
4. isIntersecting
5. rootBounds
6. target
7. time
Related pages for Intersection Observer API
1. IntersectionObserver

在此页

句法

值

范例

规范

浏览器兼容性

图例

相关话题