写 SCSS 代码应该遵循的原则_html/css_WEB-ITnose
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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