You can create your own modules, and easily include them in your applications.
The following example creates a module that returns a date and time object:
Use the [ exports keyword ] to make properties and methods available outside the module file.
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What is a Module in Node.js?
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*Consider modules to be the same as JavaScript libraries.
*A set of functions you want to include in your application.
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Include Modules
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To include a module, use the require() function with the name of the module:
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Include Your Own Module (2)
Now you can include and use the module in any of your Node.js files.
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Notice that we use ./ to locate the module, that means that the module is located in the same folder as the Node.js file.
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Built-in Modules
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Node.js has a set of built-in modules which you can use without any further installation.