A simple Sudoku board and validation implemented with ReasonML React. View the demo

yarn                 # install dependencies
yarn start           # build and watch files
yarn webpack         # in another tab build the bundle
open docs/index.html # open in your browser

After you see the webpack compilation succeed (the yarn webpack step), open up the nested html files in docs/* (no server needed!). Then modify whichever file in src and refresh the page to see the changes.