What are the differences between ES6 and CommonJS modules?

What are the differences between ES6 and CommonJS modules?

ES6 modules use the import and export syntax, while CommonJS uses require and module.exports. This affects how modules are loaded and executed.

Can you explain how the loading mechanism differs?

Sure! ES6 modules are loaded asynchronously and can be statically analyzed, while CommonJS modules are loaded synchronously, which can lead to blocking.

What about the scope of variables in these modules?

In ES6 modules, each module has its own scope, preventing variable collisions. CommonJS modules also have their own scope, but they can expose variables globally if not properly managed.

Are there any performance differences?

Yes, ES6 modules can be more performant in certain scenarios due to their static structure, allowing for better optimization by the JavaScript engine.

Which one should I use for a new project?

If you're starting a new project, it's generally recommended to use ES6 modules for better compatibility with modern tools and features.