esbuild

esbuild is a bundler for JavaScript and web assets that combines multiple files and formats into optimized bundles for browsers and Node.js environments. It processes JavaScript, TypeScript, JSX, CSS, and other content types with built-in support for both ES modules and CommonJS. The tool includes features such as tree shaking, minification, and source maps, and offers APIs for command-line, JavaScript, and Go usage. It also supports plugins for extending functionality, a local server for development, and watch mode for automatic rebuilding.

esbuild is developed by evanw and released under the MIT license. The project is written in Go and aims to significantly improve build performance compared to other web bundlers. The tool provides straightforward configuration for bundling code for different platforms and includes a bundle size analyzer for understanding output composition.