Next-generation ES module bundler
Rollup is next-generation ES module bundler. Licensed under MIT, it is extremely popular in the JavaScript ecosystem with 88.8M weekly downloads.
Rollup has an excellent overall health score of 85/100. Its strongest dimension is maintenance (100/100), while quality (50/100) is the area with most room for improvement. This package is well-maintained and actively used.
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Complete guide to npm package size optimization in 2026: tree shaking with ESM, sideEffects field, bundle analysis tools, size-limit CI checks, and eliminating.
2026-03-29T00:00:00.000ZThe CJS to ESM migration in the npm ecosystem in 2026. Which major packages went ESM-only, common migration issues, and how to handle CJS/ESM interop today.
2026-03-08T00:00:00.000ZVite uses Rollup under the hood for production builds. When should you use Rollup directly instead of Vite? Compare use cases, configuration, and tradeoffs.
2026-03-08T00:00:00.000Z