Rollup

Rollup is a module bundler for JavaScript that compiles ES6 modules into CommonJS, AMD, IIFE, or UMD formats. Current stable version is v0.0.2 (extremely early, pre-1.0). It pioneered tree-shaking for ES modules, making it popular for building libraries. Key differentiators vs webpack: smaller bundle sizes, faster builds for libraries, native ES module support. Releases are infrequent. Note: this package is abandoned; use the main 'rollup' package at npmjs.com/package/rollup.