css 变量名可以以数字开头吗?
Can a css variable name start with a number?
我想知道定义一个以这样的数字开头的css变量是否有效,
:root { --1space: 32px; }
这与 Chrome 一起工作得很好,但是该代码未被 https://jigsaw.w3.org/css-validator/ 验证,并且 VSCode 在变量名下画了一条红线。
如果css变量名是idents那么按照这个图以数字开头应该没问题;
是的,它是有效的。如果我们按照 the definition in the speficiation:
A custom property is any property whose name starts with two dashes (U+002D HYPHEN-MINUS), like --foo
. The <custom-property-name>
production corresponds to this: it’s defined as any valid identifier that starts with two dashes
和
identifier
A portion of the CSS source that has the same syntax as an <ident-token>
. Also appears in <at-keyword-token>
, <function-token>
, <hash-token>
with the "id" type flag, and the unit of <dimension-token>
.
:root {
--2222:red;
}
body {
background:var(--2222);
}
我想知道定义一个以这样的数字开头的css变量是否有效,
:root { --1space: 32px; }
这与 Chrome 一起工作得很好,但是该代码未被 https://jigsaw.w3.org/css-validator/ 验证,并且 VSCode 在变量名下画了一条红线。
如果css变量名是idents那么按照这个图以数字开头应该没问题;
是的,它是有效的。如果我们按照 the definition in the speficiation:
A custom property is any property whose name starts with two dashes (U+002D HYPHEN-MINUS), like
--foo
. The<custom-property-name>
production corresponds to this: it’s defined as any valid identifier that starts with two dashes
和
identifier
A portion of the CSS source that has the same syntax as an
<ident-token>
. Also appears in<at-keyword-token>
,<function-token>
,<hash-token>
with the "id" type flag, and the unit of<dimension-token>
.
:root {
--2222:red;
}
body {
background:var(--2222);
}