Pruning the Bloat: Mastering Tree Shaking in Rollup
Stop shipping unused code. Learn how Rollup's tree shaking uses ESM static analysis to prune dead code and how to avoid the common 'side effect' pitfalls that break production apps.
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rollupThe sideEffects Contract: Tuning Rollup Tree-Shaking for Library Builds
Tree-shaking in Rollup depends on a precise sideEffects contract. Learn how ESM boundaries, named exports, and visualizer audits keep library bundles lean.
javascriptAuditing Rollup Bundles to Remove Unused ES Module Exports
A practical audit for Rollup bundles: identify exports that survive tree shaking, decide between moduleSideEffects and /*@__PURE__*/ annotations, and verify the result without breaking side-effect code.
Diagnosing Rollup Tree‑Shaking Failures: A Practical Checklist
Spot and fix Rollup tree‑shaking failures that leave unused code in your bundle. Follow a step‑by‑step diagnostic checklist, example config, and verification steps to reduce bundle size.
Making Rollup Tree Shaking Work: Practical Tips for Removing Unused JavaScript
Learn how Rollup’s static analysis removes unused JavaScript, what configuration and side‑effect markings are required, and how to verify the savings in a real‑world bundle.
Choosing Rollup Output Formats for a Library: ES, CJS, and Tree-Shaking Decisions
A decision guide for publishing a library with Rollup: why dual es + cjs output is the practical default, how external and sideEffects settings make or break tree-shaking, and how to validate the result.
Lodash Is Bloating Your Production Bundle: A Diagnostic Guide to Import Patterns
Your bundle ships 70 KB of Lodash but you use five functions. Diagnose which import pattern is defeating tree-shaking, fix it, and verify with the bundle analyzer.
lodash
webpackRollup Tree-Shaking: How Static Imports Shrink Your Bundle (and What Breaks It)
Rollup's tree-shaking works because ES modules are statically analyzable. Here's how it prunes unused code, a verifiable example, and the side-effect and CommonJS pitfalls that defeat it.
Optimizing Rollup Bundles: The Power of the sideEffects Flag
Rollup’s sideEffects flag lets you prune unused code, but it must be used carefully. Learn how to set the flag, test bundle size gains, and avoid breaking your app.