Demonstration for functionality of Parce to create js library
yarnyarn build --global FOUR # build as `FOUR` into `dist` dir
# Launch Local Server at project root
# For exmaple,
# python -m http.server
Please note that index.html and dist/index.js are completely isolated from src/ files, which are targetted by Parcel.
In index.html, you can use your code as FOUR in this case.