If you are creating a separate directory for each "module" then it would just be one more file in each directory. Component - index.js - Component.js - comp

If you are creating a separate directory for each "module" then it would just be one more file in each directory. Component - index.js - Component.js - component.scss - Component.spec.js This structure has worked really well for me, you have everything you need in a single directory so you don't have to jump around to another directory to find the test or styling or whatever.