React
What Is React, and Why Does Everyone Build Components?
React lets you build a UI out of small, reusable pieces instead of one giant tangle of markup and jQuery.
Tutorials
All tutorials
React
JSX and Your First React Components
JSX looks like HTML but it is JavaScript underneath, and composing small components is how every React app is built.
React
Props and the useState Hook: Making Components Interactive
Props flow data down into a component; state is the memory a component keeps for itself and can change over time.
React
Rendering Lists and Handling Events in React
Almost every real UI is a list of something — this is how React renders arrays and reacts to clicks and input.
React
useEffect and Fetching Data From a Real API
useEffect is how a component reaches outside itself — timers, subscriptions, and fetching data from a real backend.
React
Real Project: Building a Todo App With React
A complete, working todo app built from scratch — the classic first real React project, done properly.
React
Real Project: A Weather Dashboard That Talks to a Live API
A second real project: a small weather dashboard that searches a city and fetches live results from an external API.
Docker
What Is Docker, and Why Should You Care?
Docker packages an app with everything it needs to run, so it behaves the same on your laptop, a teammate's machine, and the server.
Docker
Writing Your First Dockerfile
A Dockerfile is a short recipe describing how to build your image, one instruction at a time.