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Node.js Modules

Introduction to Node.js
What is Node.js? History and Evolution of Node.js Advantages and Disadvantages of Node.js Use Cases of Node.js
Setting Up Node.js Environment
Node.js Installation Configuring Node.js NPM (Node Package Manager) Basic NPM Commands
Node.js Fundamentals
Node.js Architecture Node.js Modules Node.js Globals Node.js Callbacks EventDriven Programming Asynchronous Programming Streams and Buffers
Working with Node.js Modules
Creating and Exporting Modules Builtin Modules NPM Modules Creating a Package.json file Working with Module Dependencies Understanding Semantic Versioning
Express.js
Introduction to Express.js Setting Up Express.js HTTP Request Methods Routing in Express.js Request and Response Objects Middlewares in Express.js Handling Errors in Express.js
Working with Databases in Node.js
Introduction to Databases SQL vs NoSQL Databases Connecting to Databases in Node.js MongoDB (a NoSQL Database) Mongoose (an Object Data Modeling Library) CRUD Operations with MongoDB and Mongoose
Testing and Debugging in Node.js
Why is Testing Important? Unit Testing Integration Testing Debugging Node.js Applications Debugging with npm Debugger Debugging with Visual Studio Code
Deployment and Scaling of Node.js Applications
Deploying Node.js Applications Understanding the Different Environments Clustering in Node.js Load Balancing in Node.js Process Management in Node.js
Security in Node.js Applications
Common Security Threats Web Application Security Secure Coding Practices Authentication and Authorization Handling Passwords and Sensitive Data
Best Practices and Patterns in Node.js
Coding Best Practices Design Patterns Architectural Patterns Scalable Application Architecture Choosing the Right Tools and Techniques
←Node.js Modules

Node.js provides a number of built-in modules that you can use out of the box. These include modules for working with file system, networking, cryptography, HTTP, and more. To use a built-in module, you simply have to require it at the beginning of your code file using the special `require()` function

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Node.js is a powerful JavaScript runtime environment that provides a rich set of built-in modules to make the development process easier and faster. These modules are available to use without the need of installing any third-party packages, hence they can be used straight out of the box.

To use a built-in module, you need to require it at the beginning of your code file, like this:

 
                    
const fs = require('fs');

Here, we are requiring the built-in 'fs' (file system) module that provides a set of APIs for working with files in Node.js. The returned value of the require function is an object that provides all the functionalities of the required module.

Now that the 'fs' module has been required, you can call its functions and methods to read, write, and manipulate files in your code.

For example, to read a file, you can use the readFile function provided by the 'fs' module, like this:

 
                    
fs.readFile('file.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

This will read the contents of a file named 'file.txt' in the current directory and output it to the console.

Similarly, you can use other built-in modules like 'http', 'crypto', 'net', etc. to perform various operations related to networking, cryptography, and other functionalities in your Node.js application. By leveraging these modules, you can save time and effort in building your application's features and functionalities.

March 27, 2023

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