css at-rule在样式属性中是否有效？

Question

Is the following markup valid? 以下标记是否有效？

<!DOCTYPE html>
<html>
    <head>
         <title>Test whether at-rules are valid in style attributes</title>
    </head>
    <body style="@import url(style.css);"></body>
</html>

Firefox and Chromium on Linux don't render it, but the W3C validator did not mark it as an error. Linux上的Firefox和Chromium不会渲染它，但W3C验证器没有将其标记为错误。

Answer 1

No. 没有。

Only a declaration may be placed inside a style attribute. 只有声明可以放在样式属性中。

From the HTML 4.01 specification : 从HTML 4.01规范：

The syntax of the value of the style attribute is determined by the default style sheet language. style属性值的语法由默认样式表语言确定。 For example, for [[CSS2]] inline style, use the declaration block syntax described in section 4.1.8 (without curly brace delimiters). 例如，对于[[CSS2]]内联样式，请使用4.1.8节（没有大括号分隔符）中描述的声明块语法。

Answer 2

It is not. 它不是。

@ -rules can't contain rules directly, but only selectors. @ -rules不能直接包含规则，只能包含选择器。

@import imports a file, but they can't have rules outside selectors. @import导入一个文件，但它们不能有选择器之外的规则。
@media can only contain selectors. @media只能包含选择器。
@font-face doesn't affect elements. @font-face不会影响元素。

The style attribute is meant for setting rules directly to elements, so clearly the @ -rules don't fit to that. style属性用于直接将规则设置为元素，因此@ -rules显然不适合。

css at-rule在样式属性中是否有效？

问题描述

2 个解决方案

解决方案1
3 已采纳 2014-07-12 20:56:56

解决方案2
2 2014-07-12 20:59:09

css at-rule在样式属性中是否有效？

问题描述

2 个解决方案

解决方案1 3 已采纳 2014-07-12 20:56:56

解决方案2 2 2014-07-12 20:59:09

解决方案1
3 已采纳 2014-07-12 20:56:56

解决方案2
2 2014-07-12 20:59:09