写 SCSS 代码应该遵循的原则_html/css_WEB-ITnose-HTML Tutorial-php.cn

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写 SCSS 代码应该遵循的原则_html/css_WEB-ITnose

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Jun 24, 2016 am 11:19 AM

KISS – Keep It Simple Stupid

“Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.”– Martin Golding

keep sass simple，不要写过度抽象，不要用复杂的语法实现简单的功能。实际上 css 文件不需要很复杂。有了预编译以后，稍不注意就产生过多的层级、巨复杂的选择器了。还有滥用函数，一点点重复都抽象出来。

正确的做法是有逻辑关联的样式才合并到一起。语义上有继承关系的样式，才使用继承。相关的代码不要分散到几百行之外。

DRY – Don’t Repeat Yourself

scss 的变量，extend，mixin 就是为了做这个的。mixin 会生成重复的代码，但是符合 Single source of truth 原则。DRY 不是不让重复（don’t repeat）而是为了保证源头只有一个，源代码只出现在一处，一次修改自动同步到所有的CSS文件。CSS中，机器自动复制出来的的重复，不破坏 DRY 原则。

参考资料：

Single source of truth https://en.wikipedia.org/wiki/Single_source_of_truth

DRY Don’t repeat yourself https://en.wikipedia.org/wiki/Don%27t_repeat_yourself

KISS https://en.wikipedia.org/wiki/KISS_principle

Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live

学这些名词有什么用？这些简洁的词，有公认的含义。跟别人交流的时候，提到这个词就明白对方在说什么。就像是成语一样，方便交流。

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