What modules are there in nodejs?

Answer: Node.js uses core modules and third-party modules to organize code. Core module: Built into Node.js, no installation required. Provide basic system functions, such as file system operations, operating system interaction, etc. Third-party modules: developed and maintained by the community. Installed via NPM, providing additional functionality and extensions. Using modules: Use the require() function to load modules.

Node.js module

Node.js uses a modular system to organize and manage code, which is mainly divided into Two categories:

Core module

• is built into the Node.js runtime environment and does not need to be installed separately.

• Provides basic system functions and operations, such as:

  • fs: File system operations
  • os: Operating system interaction
  • http: HTTP network communication
  • path: path processing
  • events: event processing

Third-party module

• Developed and maintained by the Node.js community.

• Provides a variety of additional features and extensions, including:

  • express: Web framework
  • mongoose: MongoDB database object mapper
  • lodash: Utility library
  • async: asynchronous programming

Module usage

To use modules, Please use the require() function:

<code class="javascript">const fs = require('fs');</code>

This will load the fs core module, allowing you to access its exported functions and objects.

Install third-party modules

Third-party modules can be installed through the Node.js package manager (NPM):

<code class="bash">npm install <package-name></code>

After installation, you can use require() Function loads installed modules.

Module role

Modules provide the following benefits:

• Code reuse:Modules can break down code into Reusable parts, thereby improving development efficiency.
• Modularity: Applications can be built by combining and integrating modules for increased flexibility.
• Extensibility: Third-party modules extend the functionality of Node.js, allowing developers to easily implement various functions.

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