Mongoose Aggregation Queries

Course overview

Uplatz offers this comprehensive course on Node.js: Mastering Backend Development for Scalable Applications. It is a self-paced course with video lectures. You will be awarded Course Completion Certificate at the end of the course.

Node.js is an open-source, cross-platform runtime environment built on Chrome's V8 JavaScript engine. It enables developers to run JavaScript on the server side, allowing for the creation of dynamic web applications, APIs, and other server-side functionalities.

How Node.js Works

1. Single-Threaded Event Loop Model:

   • Node.js uses a single-threaded event loop architecture to handle multiple client requests efficiently.
   • Incoming requests are placed into an event queue, and the event loop processes them asynchronously.

2. Non-Blocking I/O:

   • Input/output operations, such as reading files or querying databases, are performed asynchronously using callbacks, Promises, or Async/Await.
   • This ensures that other tasks are not blocked while waiting for operations to complete.

3. V8 JavaScript Engine:

   • Node.js uses Google’s V8 engine, which compiles JavaScript directly into machine code, providing high performance.

4. Modules:

   • Node.js has a modular design and uses a built-in module system (CommonJS) for code reuse.
   • Additional functionality is available via npm packages.

Core Features of Node.js

1. Asynchronous and Event-Driven:

   • All APIs are asynchronous and follow a non-blocking approach, making it highly efficient.

2. Fast Execution:

   • Node.js is built on the V8 engine, which provides fast execution of JavaScript code.

3. Single Programming Language:

   • Developers can use JavaScript for both frontend and backend, simplifying development.

4. Cross-Platform:

   • Node.js applications can run on Windows, macOS, and Linux.

5. Built-in Modules:

   • Includes modules for HTTP, file systems, streams, and more, reducing development time.

6. Scalability:

   • Handles a large number of simultaneous connections efficiently using an event-driven architecture.

7. npm (Node Package Manager):

   • Provides access to thousands of reusable libraries and tools for various functionalities.

8. Real-Time Applications:

   • Ideal for real-time applications like chat applications, gaming servers, and live collaboration tools.

Benefits of Learning Node.js

1. High Demand:

   • Node.js is widely used in the industry, creating opportunities for roles such as Backend Developer and Full Stack Developer.

2. Versatility:

   • Enables the development of a wide range of applications, including web, mobile, and APIs.

3. Fast Learning Curve:

   • For JavaScript developers, transitioning to Node.js is easy, as it uses the same language.

4. Community Support:

   • A large and active community offers extensive resources, libraries, and tools.

5. Job Opportunities:

   • Node.js is a critical skill for roles in modern web development, cloud computing, and API development.

6. Real-Time App Development:

   • Simplifies building applications like chat apps, streaming platforms, and online collaboration tools.

7. Cost-Effective Development:

   • Allows code sharing between frontend and backend, reducing development time and effort.

8. Scalability for Modern Apps:

   • Suitable for applications requiring scalability, such as social media platforms or e-commerce sites.