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Calling exported modules in NodeJS

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by Abdul Rawoof A R dot icon Updated: Jan 30, 2024

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A module in JavaScript is just a file containing related code. In JavaScript, we use import and export keywords to share and receive functionalities across different modules.


The export keyword makes a variable, function, class or object accessible to other modules. 



As building blocks of code structure, Node.js modules allow developers to better structure, reuse, and distribute code. A module is a self-contained file or directory of related code, which can be included in your application wherever needed. 


Types of Modules in Nodejs: 

  • Core Modules. 
  • Local Modules. 
  • Third-party Modules. 



Here is an example of how to call exported modules in Node.js:

Fig: Preview of the output that you will get on running this code from your IDE.

Code

Calling the exported modules in nodejs

Lines of Code : 10dotLicense : Strong Copyleft (CC BY-SA 4.0)

function foo() {
  console.log("Foo!");
}

foo.bar = function bar() {
  console.log("Bar!");
}

foo();
foo.bar();

Instructions

Follow the steps carefully to get the output easily.

  1. Install Node and Visual Studio Code on your computer.
  2. Create a new folder in your local.
  3. Open that folder in Visual Studio Code.
  4. Then create a new JS file(Eg: node.js).
  5. Copy the snippet using 'copy' button and paste it into that file.
  6. Save the file and open the terminal, use this command 'node filename(node.js)' to get the output in your console.


I hope you found this helpful.


I found this code snippet by searching for 'calling exported module in nodejs' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created and tested in Visual Studio Code 1.74.1.
  2. The solution is tested in Node v18.15.0.


Using this solution, we are able to call exported module in nodejs with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to call exported module in nodejs.

FAQ

1. What is meant by exporting modules in Node.js?

Exporting modules in Node.js involves making functions. It has objects and variables defined in one module available for use in other modules or files. This enables modularity and code organization in Node.js applications.


2. How do I export modules in Node.js?

It can export modules in Node.js using the module exports or exports object. It Assigns the function, object, or variable if want to export to module exports or exports.


3. Can I export multiple functions or objects from a single module?

Yes, it can export multiple functions, objects, or variables from a single module in Node.js. It assigns each function, object, or variable to module exports or exports as needed.


4. How do I call a function from an exported module in Node.js?

After importing the module using require (), it can call a function from the exported module. It can be used by dot notation, specifying the function name followed by parentheses to invoke it.


5. Can I export modules asynchronously in Node.js?

No, module exports in Node.js are synchronous and happen during the module loading phase. It can export promises or functions that return promises to handle asynchronous operations.


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