What is code splitting and how does it work?

Code splitting is an optimization technique for loading web applications, where the code is divided into several parts (chunks) that are loaded as needed, rather than all at once.

This improves page load time and performance, especially for large applications.

How it works:

• The main bundle contains the minimal code to run the application.
• Additional code parts (e.g., for individual pages or components) are loaded dynamically when the user navigates.

In modern frontend frameworks (React, Vue, Angular), this is implemented using dynamic import:

// Example of dynamic import in React
import React, { Suspense, lazy } from 'react';

const LazyComponent = lazy(() => import('./LazyComponent'));

function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <LazyComponent />
    </Suspense>
  );
}

Thus, the code for LazyComponent will only load when it is rendered, reducing the initial bundle size.