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  • :empty (Selectors) - CSS 中文开发手册
    该:empty伪类代表没有子节点的所有元素。这里只考虑元素节点和文本（包括空格）。注释或处理指令不影响元素是否被认为是空的。
    /* Selects any <div> that contains no content */div:empty { background: lime; }
  • 语法
    :empty
    实例
    body { display: flex; justify-content: space-around; } .box { background: red; height: 100px; width: 100px; } .box:empty { background: lime; }
  • <div class="box"><!-- I will be lime --></div><div class="box">I will be red</div> <div class="box"> <!-- I will be red because of the whitespace around this comment --> </div>
  • 规范

Specification

Status

Comment

Selectors Level 4The definition of ':empty' in that specification.

Working Draft

No change

Selectors Level 3The definition of ':empty' in that specification.

Recommendation

Initial definition

  • 浏览器兼容性

Feature

Chrome

Edge

Firefox (Gecko)

Internet Explorer

Opera

Safari

Basic support

1.0

(Yes)

1.0 (1.7 or earlier)

9.0

9.5

3.1


Feature

Android

Edge

Firefox Mobile (Gecko)

IE Mobile

Opera Mobile

Safari Mobile

Basic support

2.1

(Yes)

1.0 (1)

9.5

10.0

3.1