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CSS all 属性

article 2025/1/29 8:41:25

定义和用法

all 属性将除 unicode-bidi 和 direction 之外的所有属性重置为其初始值或继承的值。

实例

将应用于元素或元素父元素的所有属性更改为其初始值：

<!DOCTYPE html>
<html>
<head>
<style> 
html {
  font-size: small;
  color: blue;
}

#ex1 {
  background-color: yellow;
  color: red;
}

#ex2 {
  background-color: yellow;
  color: red;
  all: inherit;
}

#ex3 {
  background-color: yellow;
  color: red;
  all: initial;
}

#ex4 {
  background-color: yellow;
  color: red;
  all: unset;
}
</style>
</head>
<body>

<p>未设置 all 属性：</p>
<div id="ex1">Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!</div>

<p>all: inherit:</p>
<div id="ex2">Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!</div>

<p>all: initial:</p>
<div id="ex3">Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!</div>

<p>all: unset:</p>
<div id="ex4">Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!</div>

</body>
</html>

CSS 语法

all: initial|inherit|unset;

属性值

值	描述
initial	将此属性设置为其默认值。
inherit	从其父元素继承此属性。
unset	如果可继承，则将应用于元素或元素父元素的所有属性更改为其父值，否则将其更改为初始值。