Component Composition — Building UIs Like Lego Blocks

The difference between a React codebase that scales gracefully and one that collapses under its own weight almost always comes down to composition. Not state management. Not performance tricks. Composition — how you build big things out of small things.

If you've been vibe coding with AI tools, you've probably noticed that generated components tend to be monolithic. One big component that does everything. That works for a prototype, but the moment you need to reuse pieces, customize behavior, or hand the code to another developer, you need composition patterns.

This lesson covers the three most important ones: children, render props, and compound components.

The Problem With Monolithic Components

Here's a common pattern AI tools generate:

function Card({ title, description,