Key features and characteristics of Node.js include:
2. Event-Driven Architecture:
- Node.js is built on an event-driven, non-blocking I/O model. This means that it efficiently handles many simultaneous connections without the need for threads, making it suitable for applications with high concurrency.
3. Asynchronous Programming:
- Node.js emphasizes asynchronous programming, allowing developers to write code that can execute multiple tasks concurrently. This is achieved using callback functions and Promises, making it efficient for handling I/O operations.
4. NPM (Node Package Manager):
- Node.js comes with npm, a powerful package manager that facilitates the installation, sharing, and management of third-party packages and libraries. NPM is one of the largest package ecosystems in the world.
6. Single-Threaded Event Loop:
- Node.js operates on a single-threaded event loop, which handles multiple connections concurrently. It delegates I/O operations to the system kernel, freeing up the event loop to process other tasks.
- Node.js is known for its scalability, making it suitable for building applications that require handling a large number of simultaneous connections, such as chat applications, real-time collaboration tools, and streaming services.
- Node.js is cross-platform and can run on various operating systems, including Windows, macOS, and Linux. This provides flexibility in deploying applications across different environments.
9. Community and Ecosystem:
- Node.js has a vibrant and active community that contributes to its development and maintenance. The ecosystem includes a vast number of libraries and frameworks, making it easy for developers to find and use pre-built components.
- Web servers and APIs
- Real-time applications (chat, gaming)
- Single-page applications (SPAs)
- Microservices architecture
- Internet of Things (IoT) applications
Node.js uses V8, the virtual machine that powers Google Chrome, for server-side programming. V8 gives Node a huge boost in performance because it cuts out the middleman, preferring straight compilation into native machine code over executing bytecode or using an interpreter.
- Developers can write web applications in one language, which helps by reducing the context switch between client and server development, and allowing for code sharing between client and server, such as reusing the same code for form validation or game logic