The basic foundations of React.js, minus all the confusing stuff.
None! In this simple setup, all you need is an HTML file which imports the React and the ReactDOM libraries from a CDN: https://reactjs.org/docs/cdn-links.html
Try https://www.npmjs.com/package/create-react-app to get started with a boilerplate that includes a server, proper directory structure, bundling script and other important things you will need to move your app to production. Then check out this cool tutorial that explains whats going on behind the boilerplate and shows you how to start from scratch: https://www.andrewhfarmer.com/build-your-own-starter
- https://medium.freecodecamp.org/learn-react-js-in-5-minutes-526472d292f4
- https://reactjs.org/docs/react-component.html#constructor
- https://babeljs.io/repl/
- https://hackernoon.com/react-stateless-functional-components-nine-wins-you-might-have-overlooked-997b0d933dbc
- https://tylermcginnis.com/reactjs-tutorial-a-comprehensive-guide-to-building-apps-with-react/?utm_campaign=React%2BNewsletter&utm_medium=web&utm_source=React_Newsletter_118
- https://medium.com/@baphemot/understanding-reactjs-component-life-cycle-823a640b3e8d
- https://developmentarc.gitbooks.io/react-indepth/content/life_cycle/the_life_cycle_recap.html