What is module caching in CommonJS?

What is module caching in CommonJS?

Module caching in CommonJS refers to the mechanism where modules are loaded and cached after their first execution, so subsequent calls to require the same module return the cached version instead of reloading it.

Why is module caching important?

It's important because it improves performance by reducing the overhead of loading modules multiple times, and it ensures that the same instance of a module is used throughout the application.

Can you give an example of how it works?

Sure! When you require a module for the first time, it's executed and cached. If you require it again, the cached version is returned, preserving any state or changes made.

What happens if I change the module after it's cached?

If you change the module's code, the cached version won't reflect those changes until the process is restarted, as CommonJS does not automatically reload modules.