react-from-zero (via) Interesting approach to teaching and understanding React: unlike most other tutorials this skips Webpack and ES6 entirely an focuses on things you can get running just using a browser and loading code via script tags. It does eventually load Babel to enable client-side JSX transforms, but before that it shows how React can be used by loading react.js and react-dom.js and then calling React.createElement() manually (or by using the 0xeac7 magic symbol and constructing JavaScript objects manually with $$typeof: magicValue).