我可以在 SASS 中使用&符号来引用父类的特定标签吗? [英] Can I use the ampersand in SASS to reference specific tags with the parent class?

问题描述

我有一个 semantic 类，我将它应用于许多不同的元素.根据类应用于哪个 html 标签，我希望它应用不同的样式.这就是我尝试这样做的方式:

I have a class semantic which I apply to many different elements. Depending on which html tag the class is applied to, I would like it to apply a different style. This is how I tried to do it:

.semantic {
    &ul {
        padding: 0;
        margin: 0;
    }
    &p {
        margin: 0;
    }
}

这不起作用.我当然可以这样写，但不会很干":

This doesn't work. Of course I could write it like this, but it wouldn't be very "DRY":

 .semantic ul {
    padding: 0;
    margin: 0;
 }

 .semantic p {
     margin: 0;
 }

这可能吗?

为了澄清起见，以下是我的 HTML 外观示例:

For clarification, here is an example of what my HTML looks like:

<ul class='semantic'>
    <li>An Item</li>
</ul>

<p class='semantic'>This text is semantically a paragraph, but should not be displayed as such</p>

推荐答案

理论上你想要的是这样的:

What you're wanting for would in theory look like this:

.semantic {
    ul& {
        padding: 0;
        margin: 0;
    }
    p& {
        margin: 0;
    }
}

这是不可能的，因为 & 必须是第一个.你只需要处理它不是 DRY 的事实并用手写出来:

This is not possible because the & must be first. You're just going to have to deal with the fact that it isn't DRY and write it out by hand:

ul.semantic {
    padding: 0;
    margin: 0;
}

p.semantic {
    margin: 0;
}

从 Sass 3.3 或 3.4 开始，可以使用以下语法:

As of Sass 3.3 or 3.4, it is possible using this syntax:

.semantic {
    ul#{&} {
        padding: 0;
        margin: 0;
    }
    p#{&} {
        margin: 0;
    }
}

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