SASS编译出空的CSS文件？

Question

SASS编译出空的CSS文件？

4

我正在尝试将这段小的SCSS编译成CSS:

$font-size: 16px;
$em: $font-size / 1em;

$column: 48px;
$gutter: 24px;

 $cols1: ( 1 * ($column + $gutter) - $gutter) / $em;
 $cols2: ( 2 * ($column + $gutter) - $gutter) / $em;
 $cols3: ( 3 * ($column + $gutter) - $gutter) / $em;
 $cols4: ( 4 * ($column + $gutter) - $gutter) / $em;
 $cols5: ( 5 * ($column + $gutter) - $gutter) / $em;
 $cols6: ( 6 * ($column + $gutter) - $gutter) / $em;
 $cols7: ( 7 * ($column + $gutter) - $gutter) / $em;
 $cols8: ( 8 * ($column + $gutter) - $gutter) / $em;
 $cols9: ( 9 * ($column + $gutter) - $gutter) / $em;
$cols10: (10 * ($column + $gutter) - $gutter) / $em;
$cols11: (11 * ($column + $gutter) - $gutter) / $em;
$cols12: (12 * ($column + $gutter) - $gutter) / $em;
$cols13: (13 * ($column + $gutter) - $gutter) / $em;
$cols14: (14 * ($column + $gutter) - $gutter) / $em;
$cols15: (15 * ($column + $gutter) - $gutter) / $em;
$cols16: (16 * ($column + $gutter) - $gutter) / $em;

我用 sass grid.scss grid.css 和 sass --watch grid.scss:grid.css 都试过了，但得到的都是一个空的 css 文件。出了什么问题？

- fullstackplus

12

你希望CSS文件包含什么内容？在SCSS文件中，你所做的只是定义变量，这些变量只有在你在CSS规则中使用它们时才会输出到CSS文件中。 - pjumble

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- rudolph9 · Accepted Answer

正如@pjumble评论所说，你只是在定义变量。将你的代码添加额外的hello_world语句：

$font-size: 16px;
$em: $font-size / 1em;

$column: 48px;
$gutter: 24px;

 $cols1: ( 1 * ($column + $gutter) - $gutter) / $em;
 $cols2: ( 2 * ($column + $gutter) - $gutter) / $em;
 $cols3: ( 3 * ($column + $gutter) - $gutter) / $em;
 $cols4: ( 4 * ($column + $gutter) - $gutter) / $em;
 $cols5: ( 5 * ($column + $gutter) - $gutter) / $em;
 $cols6: ( 6 * ($column + $gutter) - $gutter) / $em;
 $cols7: ( 7 * ($column + $gutter) - $gutter) / $em;
 $cols8: ( 8 * ($column + $gutter) - $gutter) / $em;
 $cols9: ( 9 * ($column + $gutter) - $gutter) / $em;
$cols10: (10 * ($column + $gutter) - $gutter) / $em;
$cols11: (11 * ($column + $gutter) - $gutter) / $em;
$cols12: (12 * ($column + $gutter) - $gutter) / $em;
$cols13: (13 * ($column + $gutter) - $gutter) / $em;
$cols14: (14 * ($column + $gutter) - $gutter) / $em;
$cols15: (15 * ($column + $gutter) - $gutter) / $em;
$cols16: (16 * ($column + $gutter) - $gutter) / $em;

.hello_world{ width: $column }

命令sass grid.scss grid.css会生成以下内容：

.hello_world {
  width: 48px; }