Gulp-sass is a light-weight wrapper around either Dart Sass or Node Sass, although currently only Node Sass is packaged for Debian in the node-node-sass package.

gulp-sass must be imported into your gulpfile, where you provide it the compiler of your choice. To use gulp-sass in a CommonJS module (which is most Node.js environments), do something like this:

> const sass = require('gulp-sass')(require('node-sass'));

Node.js is an event-based server-side JavaScript engine.