Rollup
Rollup is a JavaScript module bundler that compiles small pieces of code into a larger, optimized library or application. It uses the ES6 module format for its syntax and is known for its tree-shaking capabilities, which eliminate unused code to produce smaller bundles. It is commonly used for building libraries and applications where performance and bundle size are critical.
Developers should learn Rollup when they need to create efficient, production-ready JavaScript bundles, especially for libraries or applications where minimizing file size is a priority. It is ideal for projects using modern ES6+ modules, as its tree-shaking feature removes dead code, leading to faster load times and better performance. Use cases include building npm packages, web applications with complex dependencies, and projects that require advanced optimization techniques.