:empty CSS 伪类 代表没有子元素的元素。子元素只可以是元素节点或文本(包括空格)。注释或处理指令都不会产生影响。

/* Selects any <div> that contains no content */
div:empty {
  background: lime;
}

语法

:empty

例子

HTML

<div class="box"><!-- I will be lime --></div>
<div class="box">I will be pink</div>
<div class="box">
    <!-- I will be red because of the whitespace around this comment -->
</div>

CSS

.box {
    background: pink;
    height: 80px;
    width: 80px;
}

.box:empty {
    background: lime;
}

Result

规范

Specification Status Comment
Selectors Level 4
:empty
Working Draft No change.
Selectors Level 3
:empty
Recommendation Initial definition.

浏览器兼容

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 1Edge Full support YesFirefox Full support 1IE Full support 9Opera Full support 9.5Safari Full support 3.1WebView Android Full support 2Chrome Android ? Edge Mobile Full support YesFirefox Android Full support 4Opera Android Full support 10Safari iOS Full support 3.1Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

参考

文档标签和贡献者

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