Code Splitting

Code splitting is a build-tool technique that breaks a JavaScript bundle into smaller chunks that are loaded on demand, typically per route or per dynamic import, instead of shipping the entire application as a single file.

Code splitting is a build-tool technique that breaks a JavaScript bundle into smaller chunks that are loaded on demand, typically per route or per dynamic import, instead of shipping the entire application as a single file.

Learn more in our reducing JavaScript bundle size guide, or work with us through our done-for-you speed optimization service.

Modern bundlers such as Vite, webpack, and Rollup report bundle composition and chunk sizes after a build.