Is module caching used when it is connected via the require function in Node.js?

Yes, when a module is loaded via the require function in Node.js, it is cached. This means that on the first call to require('module'), the module is loaded and executed, and the result is stored in the cache.

On subsequent calls to require with the same path, the cached object is returned, and the module is not executed again. This helps avoid reloading and reinitializing the module, improving performance and providing singleton-like behavior.

If you need to reset the cache, you can delete the module from require.cache, but this is rarely done and should be done with caution.