SCSS mixin 中 if/else 条件的语法 [英] Syntax for if/else condition in SCSS mixin

问题描述

我正在尝试学习 SASS/SCSS，并且正在尝试重构我自己的 mixin 以进行 clearfix

Hi I'm trying to learn SASS/SCSS and am trying to refactor my own mixin for clearfix

我想要的是 mixin 是基于我是否给 mixin 传递了一个宽度.

what I'd like is for the mixin to be based on whether I pass the mixin a width.

到目前为止的想法(只有伪代码，因为我将包括其他混合)

thoughts so far (pseudo code only as I will be including other mixins)

@mixin clearfix($width) {

   @if !$width {

    // if width is not passed, or empty do this

   } @else {

        display: inline-block;
        width: $width;
   }
}

这就是我认为我可以调用它的方式，但它不起作用.

here's how I thought I might call it, but it's not working.

@include clearfix();

或

@include clearfix(100%)

或

@include clearfix(960px)

如果能以最佳或正确的方式执行此操作，我将不胜感激！

I'd appreciate any help on the best or right way to do this!

推荐答案

你可以试试这个:

$width:auto;
@mixin clearfix($width) {

   @if $width == 'auto' {

    // if width is not passed, or empty do this

   } @else {
        display: inline-block;
        width: $width;
   }
}

我不确定您的预期结果，但设置默认值应该返回 false.

I'm not sure of your intended result, but setting a default value should return false.

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