<ul><li>Dual package support is important for building Universal npm libraries.</li><li>The JavaScript ecosystem currently operates with two module systems: CommonJS (CJS) and ES Modules (ESM).</li><li>Building libraries that support both formats helps maintain backward compatibility, support modern JavaScript workflows, reduce ecosystem fragmentation, and provide a smoother migration path.</li><li>The implementation guide suggests a straightforward approach to implement dual-package support, including project structure, TypeScript support, build configuration, and package.json configuration.</li></ul>

Building Universal npm Libraries: Supporting Both CJS and ESM

Discover more