shadcn/ui Deep Dive: Theming, Custom Variants, and Building Your Own Components

shadcn/ui has become the de facto component library for Next.js. It's not a package you install -- it's components you own. Here's how to use it effectively and customize it properly. What Makes shadcn/ui Different Most component libraries (MUI, Chakra, Ant Design) ship as npm packages. You import their components and customize through props and theme overrides. shadcn/ui copies the component source code into your project: npx shadcn-ui@latest add button # Adds: components/ui/button.tsx # You own this file -- modify it freely This means: No version conflicts or breaking upgrades Full control over every line of the component Built on Radix UI (accessible primitives) + Tailwind Components are a starting point, not a constraint Initial Setup npx shadcn-ui@latest init This creates components.json and sets up the base config: { "style": "default", "rsc": true, "tsx": true, "tailwind": { "config": "tailwind.config.ts", "css": "app/globals.css", "baseColor": "slate", "cssVariables": true }, "