Reducing Tooling Fatigue with Bun's Built-in Bundler
Stop managing complex config files. Learn how Bun's built-in Rust-based bundler handles TypeScript and CommonJS natively to streamline your build pipeline.
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javascriptStop importing all of core-js: targeted polyfills with feature detection
Blanket core-js imports bloat bundles and risk overriding natives. Targeted modular imports with runtime feature detection give smaller builds and safer polyfills for web and Node apps.
corejsDiagnosing 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.
rollupUsing Rollup's preserveModules to Keep ES Module Structure
Learn how Rollup's preserveModules option keeps your ES module file structure intact while allowing tree‑shaking of external dependencies.
Resolving Rollup Circular Dependency Warnings in ESM Builds
Diagnose Rollup circular dependency warnings by reading the module chain, extracting shared code to a leaf module, deferring with dynamic import, or externalizing third-party cycles.
Cache Vendor Code with Rollup's manualChunks for Stable Long‑Term Builds
Learn how Rollup's manualChunks option separates vendor code into a stable chunk, improving long‑term caching and reducing unnecessary downloads.
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.
Rollup 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.