React

Start with A Basic React+Redux Introductory Tutorial or Code The Game Of Life With React, which build something small in an afternoon. The Build A Random Quote Machine video series (7 parts) is another gentle start. From there, clone-style projects teach how a real app fits together: React Tutorial: Cloning Yelp from Fullstack React, Create Todoist clone with React and Firebase (video), Build A Simple Medium Clone using React.js and Node.js, and Create a Trello Clone, which pairs React with an Elixir and Phoenix backend.

Several tutorials focus on tooling rather than features: Learn Webpack For React, Build Your Own React Boilerplate, Testing React App With Puppeteer and Jest, and Build A Chrome Extension with React + Parcel. Teropa's Full Stack Movie Voting App builds the client and server test-first with Mocha, Redux and Immutable, and Create Serverless React.js Apps (Serverless Stack) deploys a React app on AWS.

Many of these were written between 2015 and 2018, before React hooks arrived in React 16.8, so expect class components and older Redux patterns. The ideas still carry over, but use current React docs for setup. React Native and Next.js projects have their own sections.