Building a Component Registry Pattern in Next.js

The Problem

When building a themeable application, you need a way to render different components based on configuration. A page layout might specify “render a Hero section here, then a Latest Posts grid, then a Newsletter signup” — but the actual component implementations should be swappable.

This is where the component registry pattern comes in. Instead of hardcoding imports, you maintain a map of component names to their implementations, and a renderer that resolves names to components at runtime.

The Registry

The registry is simply a Record mapping string names to React components. In Next.js, we use dynamic imports for code splitting — only the components actually used on a page get loaded.

Each component in the registry accepts typed props and consumes theme tokens via CSS variables. This means you can swap the visual theme without changing any component code — just update the CSS custom properties.

Type Safety

The key insight is using a union type for component names. This gives you autocomplete in your layout configuration files and compile-time errors when you reference a component that does not exist. TypeScript catches the typo before your users do.

The Section Renderer

The SectionRenderer is the engine that reads a layout configuration and renders the corresponding components. It wraps each section in a Suspense boundary for streaming and an ErrorBoundary for fault isolation. If one section fails to load, the rest of the page still renders.

This pattern scales beautifully. Adding a new section type means creating the component and adding one line to the registry. No changes to the renderer, no changes to the routing, no changes to the build configuration.

When to Use This Pattern

The registry pattern shines when you need configurable page layouts — CMS-driven pages, theme systems, white-label applications, or any scenario where the page structure is determined by data rather than code. For simpler applications with fixed layouts, direct imports are simpler and more appropriate.