Next.js Best Practices
Software development skill, available on Zeplik
Next.js Best Practices is a ready-to-run software development skill on Zeplik. Next.js App Router: Server Components, data fetching, routing and rendering patterns. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
The Next.js Best Practices skill loads automatically when your request matches it, or you can invoke it directly by typing /nextjs-best-practices in any chat. It works with attachments, connectors, and any model that supports the task, so you get the same expert method every time without setting anything up.
What the Next.js Best Practices skill can do
- Decide whether components should be server or client rendered
- Recommend data fetching and caching strategies for App Router
- Structure routes using layouts, loading, error and not-found files
- Flag anti-patterns like overusing use client or missing error boundaries
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How the Next.js Best Practices skill works
Next.js Best Practices
Principles for Next.js App Router development.
1. Server vs Client Components
Decision Tree
Does it need...?
│
├── useState, useEffect, event handlers
│ └── Client Component ('use client')
│
├── Direct data fetching, no interactivity
│ └── Server Component (default)
│
└── Both?
└── Split: Server parent + Client child
By Default
| Type | Use |
|---|---|
| Server | Data fetching, layout, static content |
| Client | Forms, buttons, interactive UI |
2. Data Fetching Patterns
Fetch Strategy
| Pattern | Use |
|---|---|
| Default | Static (cached at build) |
| Revalidate | ISR (time-based refresh) |
| No-store | Dynamic (every request) |
Data Flow
| Source | Pattern |
|---|---|
| Database | Server Component fetch |
| API | fetch with caching |
| User input | Client state + server action |
3. Routing Principles
File Conventions
| File | Purpose |
|---|---|
page.tsx | Route UI |
layout.tsx | Shared layout |
loading.tsx | Loading state |
error.tsx | Error boundary |
not-found.tsx | 404 page |
Route Organization
| Pattern | Use |
|---|---|
Route groups (name) | Organize without URL |
Parallel routes @slot | Multiple same-level pages |
Intercepting (.) | Modal overlays |
4. API Routes
Route Handlers
| Method | Use |
|---|---|
| GET | Read data |
| POST | Create data |
| PUT/PATCH | Update data |
| DELETE | Remove data |
Best Practices
- Validate input with Zod
- Return proper status codes
- Handle errors gracefully
- Use Edge runtime when possible
5. Performance Principles
Image Optimization
- Use next/image component
- Set priority for above-fold
- Provide blur placeholder
- Use responsive sizes
Bundle Optimization
- Dynamic imports for heavy components
- Route-based code splitting (automatic)
- Analyze with bundle analyzer
6. Metadata
Static vs Dynamic
| Type | Use |
|---|---|
| Static export | Fixed metadata |
| generateMetadata | Dynamic per-route |
Essential Tags
- title (50-60 chars)
- description (150-160 chars)
- Open Graph images
- Canonical URL
7. Caching Strategy
Cache Layers
| Layer | Control |
|---|---|
| Request | fetch options |
| Data | revalidate/tags |
| Full route | route config |
Revalidation
| Method | Use |
|---|---|
| Time-based | revalidate: 60 |
| On-demand | revalidatePath/Tag |
| No cache | no-store |
8. Server Actions
Use Cases
- Form submissions
- Data mutations
- Revalidation triggers
Best Practices
- Mark with 'use server'
- Validate all inputs
- Return typed responses
- Handle errors
9. Anti-Patterns
| ❌ Don't | ✅ Do |
|---|---|
| 'use client' everywhere | Server by default |
| Fetch in client components | Fetch in server |
| Skip loading states | Use loading.tsx |
| Ignore error boundaries | Use error.tsx |
| Large client bundles | Dynamic imports |
10. Project Structure
app/
├── (marketing)/ # Route group
│ └── page.tsx
├── (dashboard)/
│ ├── layout.tsx # Dashboard layout
│ └── page.tsx
├── api/
│ └── [resource]/
│ └── route.ts
└── components/
└── ui/
Remember: Server Components are the default for a reason. Start there, add client only when needed.
How to use the Next.js Best Practices skill
Sign in to Zeplik
Create a free Zeplik account or sign in. New accounts start with free credits, so you can try the Next.js Best Practices skill right away.
Describe your software development task
Ask in plain language, or type /nextjs-best-practices to invoke the skill directly. Zeplik recognizes the Next.js Best Practices skill and applies its method.
Review and refine the result
Zeplik returns a clear, structured answer. Ask follow-ups in the same chat to refine it or take the next step.
Source and credit
- Author
- davila7 (D7 Class-A standalone)
- License
- MIT
Adapted from the open-source davila7/claude-code-templates project and tuned to run natively on Zeplik. View source on GitHub.
Frequently asked questions
- What is the Next.js Best Practices skill?
- Next.js Best Practices is a ready-to-run software development skill on Zeplik. Next.js App Router: Server Components, data fetching, routing and rendering patterns. Ask in plain language and Zeplik applies the skill's method for you inside the conversation, on whichever AI model you prefer.
- How do I use Next.js Best Practices on Zeplik?
- Sign in to Zeplik and ask in plain language, or type /nextjs-best-practices in any chat to invoke it directly. The skill applies its method and returns a result you can refine in the same conversation.
- Which AI model does the Next.js Best Practices skill use?
- Any model you choose. Zeplik works across every model in one chat, so the Next.js Best Practices skill runs on your preferred model for the task.
- Where does the Next.js Best Practices skill come from?
- The Next.js Best Practices skill is adapted from the open-source davila7/claude-code-templates project (MIT) and tuned to run natively on Zeplik. The original source is linked on this page.
- How much does the Next.js Best Practices skill cost?
- Using the skill is free to start. You only spend Zeplik credits when the assistant runs, and new accounts begin with free credits.
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