CSS属性旁边的星号是什么意思？ [英] What does an asterisk mean next to a CSS property?

问题描述

可能重复：

星号在CSS属性名称中做什么？

我想弄明白这个CSS文件中vertical-align：middle属性旁边的星号（*）是什么意思：

I am trying to figure out what the asterisk (*) means next to the "vertical-align: middle" property in this CSS file:

button, input, select, textarea { 
  font-family: sans-serif; 
  font-size: 100%; 
  margin: 0; 
  vertical-align: baseline; 
  *vertical-align: middle; 
}

此外，为什么会将vertical-align重复两次，值不同于第一个？

Also, why would "vertical-align" be repeated twice, with the asterisk value different than the first?

我知道类名称旁边的意思，但是我从来没有见过它的属性。

I know what it means next to the class name, but I've never seen it next to a property.

推荐答案

这是一个CSS黑客。只有IE7及以下会识别它。

It's a CSS hack. Only IE7 and below will recognize it.

我不建议使用它。相反，使用IE条件注释为BODY标记呈现不同的类名称，具体取决于所使用的IE的版本。

I wouldn't recommend using it. Instead, use IE conditional comments to render a different class name for the BODY tag depending on the version of IE being used.

当我要处理旧版本的IE时，我使用类似以下的方法：

When I have to deal with old versions of IE, I use a method similar to this:

a href =http://nicolasgallagher.com/better-conditional-classnames-for-hack-free-css/> http://nicolasgallagher.com/better-conditional-classnames-for-hack-free-css/

http://nicolasgallagher.com/better-conditional-classnames-for-hack-free-css/

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