Sass Instead of brackets and semicolons, it uses the indentation of lines to specify blocks. It is hard to decide which one is better and why. Angular CLI provides built-in support to both sass and scss (Sassy CSS). The difference between the two is mainly the syntax. The sass syntax is based on proper indentation and it doesn’t have semi-colons and curly braces, whereas scss syntax is more like CSS and therefore it is easy to convert css into scss. What is the difference between CSS and SCSS - GeeksforGeeks SASS vs LESS: What to Choose? - Cynoteck Ready to integrate or switch CSS Preprocessors on React project: … LESS or SCSS or SASS: Which one is the Best? - Web3Canvas Themeing, Stylus vs SCSS