Exporting and Consuming Modules
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While everything in Node.js is generally done asynchronously, require()
is not one of those things. Since modules in practice only need to be loaded once, it is a blocking operation and should be used properly.
Modules are cached after the first time they are loaded. Should you be editing a module in development, you will need to delete its entry in the module cache in order to use new changes. That being said, even if a module is cleared out of the module cache, the module itself is not garbage collected, so care should be taken for its use in production environments.
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