Getting started with React.

React taught me to build an interface out of components. You make a small piece once, like a button or a card, and reuse it wherever you need it. React works out what changed and only updates that part of the page, so it stays fast even in a big app.

The most important thing to learn is state. That means knowing where your data lives, when to lift it up to a parent, and how to use hooks. Data in React flows one way, from parent to child, which makes a bug much easier to track down. There's also a big community around it, so there's usually a library or an answer for whatever you're stuck on.