In this demo, I used Modules to make my previous "JavaScript Events Project Planner" app code more readable. To do that, I used the module type and a dummy web server for development. With modules, every Javascript file states its dependencies and has its own import. So they help me split my code and download things only when I need them.
https://sofiane-abou-abderrahim.github.io/modular-javascript-events-project-planner/