WeDoctor Frontend Technology

Jun 27, 2021 · Frontend Development

How Webpack and Rollup Implement Tree-Shaking: A Deep Dive

This article compares the tree‑shaking mechanisms of Rollup and Webpack, explains the three stages Webpack uses (UglifyJS, BabelMinify, Terser), details side‑effects handling, configuration tips, and performance benchmarks, providing practical guidance for optimizing bundle size in modern JavaScript projects.