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这是一个实验中的功能
此功能某些浏览器尚在开发中,请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订,所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

ResizeObserverEntry 接口是传递给ResizeObserver() 构造器回调函数中的参数对象。

属性

ResizeObserverEntry.contentRect  只读
对改变尺寸大小的元素的 DOMRectReadOnly引用(包含x,y,width,height,top,right,bottom,left属性)。
ResizeObserverEntry.target  只读
当前改变尺寸大小的元素的 Element 引用
 

事件

方法

无.

示例

以下示例通过观察box的宽度变化从而改变其边框圆角半径。

const resizeOserver = new ResizeObserver(entries => {
  for (let entry of entries) {
    entry.target.style.borderRadius = Math.max(0, 250 - entry.contentRect.width) + 'px';
  }
});
resizeObserver.observe(document.querySelector('.box:nth-child(2)'));

规范

Specification Status Comment
Resize Observer
ResizeObserverEntry
Editor's Draft Initial definition.

浏览器兼容性

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
ResizeObserverEntry
Experimental
Chrome Full support 64Edge ? Firefox ? IE ? Opera Full support YesSafari ? WebView Android Full support 64Chrome Android Full support 64Edge Mobile ? Firefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
target
Experimental
Chrome Full support 64Edge ? Firefox ? IE ? Opera Full support YesSafari ? WebView Android Full support 64Chrome Android Full support 64Edge Mobile ? Firefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
contentRect
Experimental
Chrome Full support 64Edge ? Firefox ? IE ? Opera Full support YesSafari ? WebView Android Full support 64Chrome Android Full support 64Edge Mobile ? Firefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

文档标签和贡献者

此页面的贡献者: vaynewang
最后编辑者: vaynewang,