A Deep Dive Into CommonJS and ES Modules in Node.js

Node.js has increasingly adopted ES modules as the preferred method for JavaScript modularization, offering a standardized solution compatible across different runtimes. This post explains the core differences between CommonJS and ES modules, highlighting the benefits of using ESM, such as browser compatibility, asynchronous loading, and improved static analysis. It also provides practical guidance for transitioning from CommonJS to ES modules, discussing how Node.js supports both module systems and the steps needed to migrate codebases.