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.
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rollupSplitting Vendor Code in Rollup with output.manualChunks
Use Rollup's output.manualChunks to split node_modules into a stable vendor chunk, keeping library code cached across deploys while your app code changes.
Trim Your Bundle: Using Babel’s useBuiltIns to Auto‑Insert Only Needed Polyfills
Babel’s useBuiltIns option in @babel/preset‑env lets you auto‑inject polyfills only for the features you actually use. This reduces bundle size, speeds up load times, and keeps your codebase lean. Learn how to configure it, see a concrete example, and understand the trade‑offs.
javascriptEnable and Verify Rollup Tree‑Shaking for an ES Module Bundle
Learn how to turn on Rollup’s built‑in tree‑shaking, verify that unused exports are removed, and recover if needed code is dropped.
Deterministic, readable chunk filenames in Rollup using output.plugins
Learn how to use Rollup’s output.plugins hook to generate deterministic, readable filenames for code‑split chunks while avoiding collisions and preserving cache‑busting benefits.
Rollup Tree Shaking: How Static Analysis Shrinks Your Bundle
Rollup's tree shaking uses ES Module static structure to drop unused exports. Learn how the treeshake config tunes aggressiveness, why sideEffects flags matter, and how to verify the output in CI.
Diagnosing Rollup Build Failures and Bloated Bundles: A Systematic Checklist
A systematic diagnostic sequence for Rollup's three most common failures: unresolved modules, missing exports, and unexpected bundle bloat — with fixes tied to each finding.
Chart.js 4 Modular Imports: Cutting Bundle Size with Tree-Shaking
Chart.js 4 removes auto-registration. Import only the controllers, scales, elements, and plugins you need, register them explicitly, and let your bundler tree-shake the rest. A minimal line chart with decimation drops to ~20 kB gzipped.
chartjsChoosing a Rollup Chunking Strategy: Entry Points, manualChunks, or preserveModules
A decision guide to Rollup code splitting: when to use entry-point chunks, a manualChunks function, or preserveModules, with working configs and validation steps.