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The Module System
In Chapter 1, The Node.js Platform, we briefly introduced the importance of modules in Node.js. We discussed how modules play a fundamental role in defining some of the pillars of the Node.js philosophy and its programming experience. But what do we actually mean when we talk about modules and why are they so important?
In generic terms, modules are the bricks for structuring non-trivial applications. Modules allow you to divide the codebase into small units that can be developed and tested independently. Modules are also the main mechanism to enforce information hiding by keeping private all the functions and variables that are not explicitly marked to be exported.
If you come from other languages, you have probably seen ...
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