The original title is: "Backend Internals #2: How Node.js require() loads and caches modules"

Short summary

This tutorial walks through the seven steps Node.js performs when require() is called: resolve path, check cache, read file, wrap module in a function, execute, cache, and return exports. It uses a restaurant analogy and code examples to explain module caching behavior. The post is part of a 'Backend Internals' series aimed at helping developers understand how Node.js works under the hood.

• •require() resolves path, checks cache, reads, wraps, executes, caches, and returns exports
• •Module caching means the same file's code runs only once per process
• •Understanding these internals helps with debugging, efficiency, and interview prep

Generated with AI, which can make mistakes.