sass 与 scss 的区别和关系

版权声明：本文自撰，转载先跟我说一下比较好 https://blog.csdn.net/KimBing/article/details/88070570

sass 与 scss 的区别和关系

github 库：
sass scss: https://github.com/sass/ruby-sass
less: https://github.com/less/less.js

sass 是 scss 的前身。

sass 语言在写的时候没有大括号 {} 和 分号;，就是裸奔的状态，其语言的目的是给那些不喜欢加大括号和分号结尾的人们。

后来 sass 进阶成了 scss，支持了大括号和分号，更像 less了

.sass 和 .scss 都是用的是同一个编译工具 sass(这是工具名，不是语言名)，目前 sass还支持对 .sass文件的编译

举个例子

SCSS

nav {
  ul {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  li { display: inline-block; }

  a {
    display: block;
    padding: 6px 12px;
    text-decoration: none;
  }
}

SASS

nav
  ul
    margin: 0
    padding: 0
    list-style: none

  li
    display: inline-block

  a
    display: block
    padding: 6px 12px
    text-decoration: none

上面的两个都会生成 CSS

nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
nav li {
  display: inline-block;
}
nav a {
  display: block;
  padding: 6px 12px;
  text-decoration: none;
}

这是他们 github 的官方说明

Sass makes CSS fun again. Sass is an extension of CSS, adding nested rules, variables, mixins, selector inheritance, and more.
It’s translated to well-formatted, standard CSS using the command line tool or a web-framework plugin.

Sass has two syntaxes. The new main syntax (as of Sass 3) is known as “SCSS” (for “Sassy CSS”),
and is a superset of CSS’s syntax.
This means that every valid CSS stylesheet is valid SCSS as well.
SCSS files use the extension .scss.

The second, older syntax is known as the indented syntax (or just “Sass”).
Inspired by Haml’s terseness, it’s intended for people who prefer conciseness over similarity to CSS.
Instead of brackets and semicolons, it uses the indentation of lines to specify blocks.
Although no longer the primary syntax, the indented syntax will continue to be supported.
Files in the indented syntax use the extension .sass.