# install webpack dev server
npm install -g webpack webpack-dev-server

# install dependencies
npm install

# run tests
npm test

# run webpack dev server
npm run serve

This demo is built with ES6 and React. ES6 code is transpiled to ES5 by Babel with a simple Webpack configuration.

Files breakdown:

• index.html: a straightforward html page to load the javascript app
• style.css: page styling with flexbox, cross and circle are rendered with utf-8 characters
• main.js: all view and UI of the game
• game.js: game business logic
• ai.js: basic decision making for the computer player
• test.js: unit tests built with mocha