media-feature-name-value-no-unknown

禁止媒体特性的未知值。

¥Disallow unknown values for media features.

@media (color: red) {}
/**     ↑      ↑

 * feature and value pairs like these */

该规则认为 CSS 规范中定义的媒体特性的值是已知的。

¥This rule considers values for media features defined within the CSS specifications to be known.

此规则仅适用于 CSS。你不应该为类似 CSS 的语言（例如 Sass 或 Less）打开它，因为它们有自己的语法。

¥This rule is only appropriate for CSS. You should not turn it on for CSS-like languages, such as Sass or Less, as they have their own syntaxes.

该规则是实验性的，存在一些误报，我们将在次要版本中修补这些漏报。

¥This rule is experimental with some false negatives that we'll patch in minor releases.

它有时与以下内容重叠：

¥It sometimes overlaps with:

如果标记了重复问题，你可以关闭相应的规则。

¥If duplicate problems are flagged, you can turn off the corresponding rule.

message 次要选项可以接受该规则的参数。

¥The message secondary option can accept the arguments of this rule.

选项

¥Options

以下模式被视为问题：

¥The following patterns are considered problems:

@media (color: red) { top: 1px; }

@media (width: 10) { top: 1px; }

@media (width: auto) { top: 1px; }

以下模式不被视为问题：

¥The following patterns are not considered problems:

@media (color: 8) { top: 1px; }

@media (width: 10px) { top: 1px; }