NODE.JS PROJECTS

This repository contains the NodeJS: De cero a experto) projects. Also contains a bunch of small projects that i made to practice the topics of NodeJs.

Projects

Here's the table of the projects stored in this repo, the projects are organized based on the knowledge of topics required to complete them.

Name	Tier
1. Node Foundations.	1-Beginner
2. Node foundation project .	1-Beginner
3. Node and Typescript project.	1-Beginner
4. Console App	1-Beginner
5. NOC (Network Operation Center) App	2-Intermediate
6. Json Server	2-Intermediate
7. REST Server	2-Intermediate
8. Prisma	2-Intermediate
9. User Store Server	2-Advanced

Node.js Roadmap

Node.js is an open-source, cross-platform JavaScript runtime environment.

Code Execution & Event Loop

The event loop is a crucial concept in understanding how Node.js handles asynchronous operations. Here's a brief overview of the event loop in Node.js:

1. Event Loop Overview:

   • The event loop is a continuous process that allows Node.js to perform non-blocking I/O operations, even though JavaScript in Node.js is single-threaded.
   • It enables Node.js to handle many connections concurrently, without creating a separate thread for each.

2. Phases of the Event Loop:

   • Timers: This phase executes callbacks scheduled by setTimeout() and setInterval().
   • I/O callbacks: Executes I/O-related callbacks. This includes callbacks from fs module, networking, and others.
   • Idle, prepare: Used internally.
   • Poll: Retrieves new I/O events. If there are no I/O events, it will wait for events to occur.
   • Check: Executes setImmediate() callbacks.
   • Close callbacks: Executes close event callbacks, such as those from sockets or server.close().

3. Example:

const fs = require('fs');

// Asynchronous non-blocking file read
fs.readFile('example.txt', 'utf8', (err, data) => {
    if (err) {
        throw err;
    }
    console.log(data);
});

console.log('Reading file...');

In this example, the readFile function initiates a non-blocking file read operation, and the callback function will be called once the file read is complete. Meanwhile, the program can continue to execute other tasks.

4. Microtasks and Macrotasks:
   • Promises and process.nextTick are examples of microtasks, and they have priority over macrotasks (events from the event loop phases).
   • Microtasks are executed after each phase of the event loop.

setImmediate(() => console.log('setImmediate'));
process.nextTick(() => console.log('nextTick'));

console.log('Main script');

In this example, nextTick runs before setImmediate.

Temary

1. Introduction to Node.js.

• What is Node.js?
• Why use Node.js?
• History of Node.js?
• Node.js vs Browser.
• Running Node.js code.

2. Modules.

• Creating Custom Modules.
• global keyword.
• Common Formats
  • Common JS.
  • ESM.

3. NPM.

• npx.
• Updating packages.
• Using Installed packages.
• Running Scripts.
• npm Workspaces.
• Creating packages
  • Private packages.
  • Public packages.

4. Keeping Application Running.

• Nodemon package.
• --watch argument.

5. Error Handling.

• Uncaught Exceptions.
• Types of Errors.
  • Javascript Errors.
  • System Errors.
  • User Specified Errors.
  • Assertion Erros.
• Call Stack & Stack Trace.
• Using Debugger.
• Handling Async Errors.

6. Asynchronous Programming.

• Writing Async Code.
  • Callbacks.
  • Promises.
  • Async / Await.
  • setTimeout.
  • setInterval.
  • setImmediate.
  • process.nextTick().
• Event Emitter
• Event Loop

7. Working With Files.

• fs Module.
• path Module.
• process.cwd().
• __dirname.
• __filename.
• Open Source packages
  • glob
  • globby
  • fs-extra
  • chokidar

8. Command Line Apps.

• Exiting & Exit Codes.
• Enviroment Variables.
• dotenv package.
• process.env.
• Command Line Args
  • process.argv.
  • Commander.js package.
• Printing Output
  • processs.stdout.
  • process.stderr.
  • chalk package.
  • figlet package.
  • cli-progrss package.
• Taking Input
  • process.stdin.
  • Prompts package.
  • Inquirer package.

9. Working With API's.

• Http Server
  • Fastify framework
  • NestJs framework
  • Express.js framework
  • http module.
• Making API Calls
  • http module.
  • axios package.
  • unfetch package.
  • got package.
• Authentication
  • jsonwebtoken package
  • Passport.js package

10. Templating Engines.

• EJS.
• PUG.
• MARKO.

11. Working with Databases.

• Relational
  • Native Drivers.
  • Sequelize package.
  • Prisma package.
  • TypeORM package.
  • Knex package.
• Document
  • Moogoose package.
  • Prisma package.
  • Native Drivers.

12. Testing.

• Jest.
• Mocha.
• Cypress.

13. Logging.

• Morgan.
• Winston.

14. Keeping App Runing.

• pm2 package.
• forever package.
• nohup.

15. Threads.

• Child process.
• Cluster.
• Worker threads.

16. Streams.

17. More Debugging.

• Using APM.
• node --inspect
• Memory Leaks
  • Garbage Collection

18. Common Built-in Modules.

• fs
• os
• net
• path
• url
• events
• http
• console
• assert
• process
• cluster
• perf_hooks
• crypto
• Buffer

Gdpp :D