css - CSS 属性前星号的用途

Question

以下内容摘自 Yahoo CSS 重置。有人可以解释一下星号的用途吗？

body {
  font:13px/1.231 arial,helvetica,clean,sans-serif;
  *font-size:small;
  *font:x-small;
}

Answer 1

这是针对 Internet Explorer 7 或以下版本的浏览器特定 CSS hack。

*property: value

Although Internet Explorer 7 corrected its behavior when a property name is prefixed with an underscore or a hyphen, other non-alphanumeric character prefixes are treated as they were in IE6. Therefore, if you add a non-alphanumeric character such as an asterisk (*) immediately before a property name, the property will be applied in IE and not in other browsers. Unlike with the hyphen and underscore method, the CSS specification makes no reservations for the asterisk as a prefix, so use of this hack could result in unexpected behavior as the CSS specifications evolve.

*property: value applies the property value in IE 7 and below. It may or may not work in future versions. Warning: this uses invalid CSS.

发件人:http://www.javascriptkit.com/dhtmltutors/csshacks3.shtml