Sass使用伪选择器进行扩展 [英] Sass extend with pseudo selectors

问题描述

我使用指南针来管理mac osx上的一些sass文件。我有这些文件：

I am using compass to manage some sass files on mac osx. I have these files:

sass/
      screen.scss
            partials folder/
      ...
            _fonts.scss
            _functions.scss
      ...

在字体中，我有这个规则，我想重用@extend。

In fonts I have this rule which I would like to reuse @extend.

//fonts.scss
.icon-ab-logo, {
font-family: 'icomoon';
speak: none;
font-style: normal;
font-weight: normal;
font-variant: normal;
text-transform: none;
line-height: 1;
-webkit-font-smoothing: antialiased;
}
.icon-ab-logo:before { //i want to reuse this.
content: "\e000";
}

在我有这个screen.scss的函数中：

In functions I have this screen.scss:

.logo {
position: absolute;
top: 0;
bottom: 0px;
z-index: 500;
width: 9.5em;
background: $logo;
@include transition(all 0.2s);
   &:after{
     @include icon( ".icon-ab-logo" );
   }
 }

最后在functions.scss中我称之为：

Finally in functions.scss I call this:

    @mixin icon( $icon ){
      font-family: 'icomoon';
      speak: none;
      font-style: normal;
      font-weight: normal;
      font-variant: normal;
      text-transform: none;
      line-height: 1;
      -webkit-font-smoothing: antialiased;
      @extend #{$icon}:before; //<- this is the problem, no errors just isn't parsed.
    }

有没有办法引用.icon-ab-logo：混入？解决方法？
感谢您阅读。

Is there a way to reference .icon-ab-logo:before using a mixin? Workarounds? Thanks for reading.

推荐答案

当您想要扩展一个伪类或伪元素时，您只需要扩展

When you want to extend a pseudo class or pseudo element, you just want to extend the parent selector (ie. everything that comes before the colon).

%foo:before {
  color: red;
}

.bar {
  @extend %foo;
}

生成：

Generates:

.bar:before {
  color: red;
}

所以对于你的实例，你想要做的是这样的：

So for your instance, what you want to do is this:

.icon-ab-logo, {
    font: 100%/1 'icomoon'; // use the shorthand
    speak: none;
    text-transform: none;
    -webkit-font-smoothing: antialiased;
}

%foo:before, .icon-ab-logo:before { //i want to reuse this.
    content: "\e000";
}

@mixin icon( $icon ){
    font: 100%/1 'icomoon'; // use the shorthand
    speak: none;
    text-transform: none;
    -webkit-font-smoothing: antialiased;
    @extend #{$icon};
}

.bar {
    @include icon('%foo');
}

请注意，您的mixin会生成 样式，所以它不适合广泛的重用。如果要延长这一点，会更有意义。

Be aware that your mixin generates a lot of styles, so it's not really suitable for extensive reuse. It would make a lot more sense to be extending that as well.

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