🧩 Next Component Analyzer: Stop Guessing if Your Components Should Be Server or Client

#opensource #nextjs #javascript #react

Ever added "use client" somewhere in your Next.js app just because "it might need state" — and then wondered a week later?

"Wait… does this even need to be a client component?"

Yeah… we’ve all been there.

This is the story of Next Component Analyzer: the tool built to stop guessing and help you classify components correctly, every time.

🔍 From Developer Pain to Solution

Working with Next.js, I noticed a pattern: developers often overuse "use client". Why?

They’re not sure if a component uses state or browser APIs
They’re following a habit: “Better safe than sorry”
A missed "use client" can break hooks or event handlers

But overusing "use client" isn’t harmless — it can:

Increase bundle size
Move server-renderable components to the client unnecessarily
Make your project harder to maintain , it wont just appear like that , but it can , you never know.

Wanted a way to audit components automatically and answer the question:

“Does this component really need to be a client component?”

That’s how Next Component Analyzer was like build me .

🛠 What Next Component Analyzer Does

Next Component Analyzer is your CLI sidekick for Next.js:

Scans your entire project
Detects React hooks, browser APIs, and JSX events
Suggests whether a component should be Server or Client
Highlights unnecessary "use client" directives

It’s AST-based, so it doesn’t rely on naive string matching — no false positives here.

📊 Component Classifications

The analyzer classifies components into four meaningful categories:

Category	What it means
Client Component (correct)	Has client features and `"use client"`
Suggested: Client Component	Has client features but missing `"use client"`
Suggested: Server Component	No client features, no `"use client"`
Could be Server Component (unnecessary client)	`"use client"` is present, but no client features

⚡ Installation & CLI Usage

Run without installing:

npx next-component-analyzer

Or install globally:

npm install -g next-component-analyzer
next-component-analyzer

The CLI will scan your project and produce a classification report.

💻 Programmatic Usage

Perfect for CI pipelines, dashboards, or custom scripts:

import { analyzeProject } from "next-component-analyzer";

async function run() {
  const results = await analyzeProject();
  console.log(results);
}

run();

Example output:

[
  {
    "filePath": "app/page.tsx",
    "classification": "server",
    "detected": ["fetch"]
  },
  {
    "filePath": "components/button.tsx",
    "classification": "client",
    "detected": ["useState", "useEffect"]
  }
]

✅ Integrate results into CI checks, dashboards, or editor tools.

🌟 Why This Matters

Next Component Analyzer helps you:

Keep your Next.js apps lean
Avoid unnecessary client components
Automatically enforce component architecture rules
Reduce bugs caused by forgotten "use client" directives

It turns guesswork into data-driven decisions, saving time and improving performance.

🧠 Philosophy

Every component should answer a simple question:

“Do I actually need to be a client component?”

Next Component Analyzer gives you the answer. By analyzing hooks, browser APIs, and events, it ensures intentional "use client" usage — no more guesswork, no more cluttered client bundles.