Sass Install the loaders to preprocess the Sass files. SASS Loader compiles Sass to CSS, also requires node-sass. npm install --save-dev sass-loader node-sass PostCSS Loader processes CSS with PostCSS. npm install --save-dev postcss-loader CSS Loader resolves import at-rules and url functions in the CSS. npm install --save-dev css-loader Style Loader inlines <style></style> in the DOM. npm install --save-dev style-loader URL Loader and Resolve URL Loader handle relative paths.

This follow up to the basic Webpack 3 Sass preprocessor workflow I wrote about here includes how to handle processing of relative URLs in the Sass for things like fonts and images. Ken Wheeler’s popular Slick carousel contains these asset types in its Sass, so let’s use that for this exercise. Getting Started Prerequisite: Node.js with npm. Navigate to the project root in your CLI, such as Terminal, Cygwin or PowerShell.

Basic Webpack 3 Sass preprocessor workflow using cssnano for postprocessing minification and optimization. The Autoprefixer PostCSS plugin is also included in this configuration to automatically add vendor prefixes for only the browsers that need to be supported. Before getting started, install Node.js and NPM. The default package manager for the Node.js JavaScript runtime environment, NPM is included with the Node.js installation. Project Navigate to the project root in your CLI, such as Terminal in OS X, PowersShell in Windows.