Introduction
Code Splitting is the technique of dividing the JavaScript bundle into smaller parts loaded when needed. It's key to reducing initial load time.
Entry Point Splitting
Divide your application into multiple entry points. Each main page or section has its own bundle. Users only load the code for the page they visit.
Vendor Splitting
Separate third-party libraries into a vendors chunk. This prevents re-downloading when app code changes. Leverages browser cache.
Dynamic Imports
Use dynamic import() to load modules on demand. Webpack, Vite, and Turbopack automatically detect dynamic imports and create separate chunks.
Route-based Splitting
Split code by routes. Each route loads only its code. Next.js, Nuxt, and React Router do this automatically.
Component-level Splitting
For heavy components like code editors or charts, use component-level lazy loading. They load only when the user interacts with them.
Conclusion
Code Splitting is essential for modern JavaScript applications. At Vynta, we implement code splitting strategies for ultra-fast initial loads.