This is a template for the Sass markup language. You can use this template to test Sass or create projects that rely on Sass.
As this template needs to run in the browser, it does not use node-sass but instead uses the sass.js library which creates a service worker to compile sass to css.
<link> tags with rel="scss".compileSCSS function then converts the .scss files to pure css and appends it to the <style id="css"> tag.