Code Splitting

Code splitting is a web development optimization technique that involves breaking down a large JavaScript bundle into smaller, on-demand chunks that are loaded only when needed. It reduces the initial load time of web applications by deferring non-critical code, improving performance and user experience. This is commonly implemented in modern front-end frameworks and build tools to manage application size and loading efficiency.

Also known as: Bundle Splitting, Lazy Loading, Dynamic Imports, Chunking, On-demand Loading

Why learn Code Splitting?

Developers should use code splitting when building large-scale single-page applications (SPAs) or complex web apps to minimize initial bundle size and accelerate time-to-interactive. It's particularly valuable for improving performance on slow networks or mobile devices, and for applications with multiple routes or features that aren't needed immediately. This technique helps optimize resource usage and enhances perceived speed for users.

Learning Resources

• docs: Webpack Code Splitting Guide
• docs: React Lazy and Suspense
• tutorial: Code Splitting in JavaScript - freeCodeCamp
• docs: Vue Router Lazy Loading
• video: Code Splitting Explained - YouTube