Performance/Lazy Loading
Performance / Topic

Lazy Loading

Understand how lazy loading improves performance by loading components and resources only when they are needed.

Difficulty

Beginner

Read time

16 min

Format

Concept + Code

Focus

Interview ready
Concepts
Lazy Loading
React
Performance

01 / Foundation

Understand the concept

Lazy loading reduces the initial JavaScript bundle by loading components only when they are required.

Combined with React Suspense, lazy loading improves page load times and creates a smoother user experience.

02 / Implementation

React.lazy Example

lazy-loading.tsx
import { lazy, Suspense } from "react";

const Dashboard = lazy(() => import("./Dashboard"));

export default function App() {
  return (
    <Suspense fallback={<p>Loading...</p>}>
      <Dashboard />
    </Suspense>
  );
}

04 / Interview

Test your understanding