What is module caching in JavaScript?

What is module caching in JavaScript?

Module caching in JavaScript refers to the technique of storing modules in memory after they are loaded for the first time, so that subsequent requests for the same module can be served faster without reloading it.

How does it improve performance?

It improves performance by reducing the time and resources needed to load modules multiple times, as the cached version is reused.

Can you give an example of how it works?

Sure! When you import a module in Node.js, it checks if the module is already in the cache. If it is, it uses the cached version instead of loading it again.

Are there any downsides to module caching?

Yes, one downside is that if a module is updated, the cached version may not reflect those changes until the cache is cleared.