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。
IntersectionObserver
方法
observe()
adds an element to the set of target elements being watched by the
IntersectionObserver
. One observer has one set of thresholds and one root, but can watch multiple target elements for visibility changes in keeping with those.
To stop observing the element, call
IntersectionObserver.unobserve()
.
When the visibility of the specified element crosses over one of the observer's visibility thresholds (as listed in
IntersectionObserver.thresholds
), the observer's callback is executed with an array of
IntersectionObserverEntry
objects representing the intersection changes which occurred. Note that this design allows multiple elements' intersection changes to be processed by a single call to the callback.
IntersectionObserver.observe(targetElement);
targetElement
element
whose visibility within the root is to be monitored. This element must be a descendant of the root element (or contained wtihin the current document, if the root is the document's viewport).
undefined
.
<<<...>>>
| 规范 | 状态 | 注释 |
|---|---|---|
|
Intersection Observer
The definition of 'IntersectionObserver.observe()' in that specification. |
工作草案 | 初始定义。 |
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
更新 GitHub 上的兼容性数据| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
observe
|
Chrome 51 | Edge 15 | Firefox 55 | IE 不支持 No | Opera Yes | Safari 12.1 | WebView Android 51 | Chrome Android 51 | Firefox Android ? | Opera Android ? | Safari iOS 12.2 | Samsung Internet Android 5.0 |
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。
IntersectionObserver
disconnect()
observe()
takeRecords()
unobserve()