---
title: Dynamic Imports for Heavy Components
impact: CRITICAL
impactDescription: directly affects TTI and LCP
tags: bundle, dynamic-import, code-splitting, next-dynamic
---

## Dynamic Imports for Heavy Components

Use `next/dynamic` to lazy-load large components not needed on initial render.

**Incorrect (Monaco bundles with main chunk ~300KB):**

```tsx
import { MonacoEditor } from './monaco-editor';

function CodePanel({ code }: { code: string }) {
  return <MonacoEditor value={code} />;
}
```

**Correct (Monaco loads on demand):**

```tsx
import dynamic from 'next/dynamic';

const MonacoEditor = dynamic(() => import('./monaco-editor').then((m) => m.MonacoEditor), {
  ssr: false
});

function CodePanel({ code }: { code: string }) {
  return <MonacoEditor value={code} />;
}
```