node.js

What is node.js?

Node.js is a JavaScript runtime environment based on the V8 JavaScript engine from Chrome. As a runtime environment for JavaScript Node is therefore not a framework.

JavaScript code can be executed on the server side with Node.js. This allows backend and frontend to work better together, as multiple programming languages do not have to communicate with each other. In this way, Node has become a popular alternative to PHP or Ruby. It is also more efficient for full-stack developers to write both frontend and backend code in the same programming language.

Node.js makes it possible to execute JavaScript, which is otherwise only executed in the browser, on the server as well.

In addition, Node.js is based on an asynchronous software architecture model and a large number of Node packages/libraries are available.

Node.js – runtime environment for JavaScript

Video on node.js – YouTube tutorial on the JavaScript runtime environment node.js

In this video we look at node.js. You will learn what node.js is and what it can do with JavaScript! When developing a cool web app, these two JavaScript technologies will definitely help you. Node.js is a powerful JavaScript runtime environment that allows us to execute JavaScript code outside of the browser. This means that we are no longer limited to the browser and can also use JavaScript on servers. This opens up completely new possibilities for web development, as we can now also create server-side applications with JavaScript. Nuxt.js and Node.js together form an unbeatable duo that raises the efficiency and performance of our web development to a new level. Be it server-side rendering or seamless interaction with the client side, these JavaScript technologies offer us numerous advantages for the development of a web app.

Why does node js exist?

As an asynchronous, event-driven JavaScript runtime environment , Node.js is designed for the creation of scalable network applications .

node js can manage countless network connections simultaneously

The tool used by many software developers has the ability to parallelize a large number of different network connections, meaning it can handle them simultaneously.

The callback is triggered for every connection, but if there is no work to be done, Node.js sleeps.

Advantages & goals of using node.js

• Very fast prototyping of MVP

• API-based input/output processing

• No dead locks of processes

• Scalable systems / network applications

How does node.js avoid dead locks?

node.js offers an opposite concurrency model than the thread-based ones of current operating systems. Thread-based network applications are relatively ineffective and very complicated to use. In addition, Node.js users are free from the worry of process dead-locks because there are no locks in Node.js. Almost every function in Node.js performs direct API-based input/output (I/O) processing, so at no point can a process ever be blocked.

When do node.js applications block?

A node.js application is blocked if the execution of additional JavaScript in the Node.js process has to wait until a non-JavaScript operation has been completed. This happens because the event loop is unable to continue the execution of JavaScript while a blocking operation is taking place.

How you can specifically increase performance with node.js

In Node.js, JavaScript that performs poorly because it does not wait for a non-JavaScript operation and is therefore particularly CPU-intensive (e.g. I/O) is usually not referred to as blocking. Synchronous methods in the Node.js standard library that use libuv are the most commonly used blocking operations. Native modules can also have blocking methods.

All I/O methods in the Node.js standard library provide asynchronous versions that are non-blocking and accept callback functions. Some methods also have blocking counterparts that have names ending in Sync.

These architectural properties make it easy to create scalable systems with node.js. An overview of the blocking and non-blocking features of node.js can be found here.

What can I use node.js for?

• Front-end applications
  • Web front end
  • Progressive Web Apps
  • Mobile apps
• Backend applications
• Chat applications – as a JavaScript application, node is ideal for managing simultaneous access to the chat app for a large number of users
• Real-time processing of network streams – as soon as a large number of users access an application simultaneously and changes in this application should also be displayed to all users, the runtime environment offers advantages
• Streaming – Handling large amounts of data during streaming is a requirement that Netflix solves with node.js, among other things, to optimize the performance of its streams

What are the advantages of the node.js implementation?

Developers benefit from existing knowledge of JavaScript. Node is easily extensibleand integration is directly supported by package managers such as NPM and YARN. Front-end developers can use their JavaScript knowledge to create server-side code quickly and easily with Node.js. Node remains a lightweight application that responds quickly and with which you can implement a good API solution very quickly. Node’s error management is easy to understand and allows errors to be rectified quickly. The basic Javascript language allows you to declare free variables. This Node feature then facilitates the exchange with all Javascript frameworks and JS libraries in the backend and frontend. In just a few lines of code, you can build a backend application that provides data for a frontend. This is very easy to do using the Fetch API. Axios, for example, is an alternative to node to make data fetching, i.e. the integration of data from any data source, easier. However, Node is a real improvement on previous technologies such as PHP for implementing modern backends and APIs. It is easier and faster to implement and uses the same language as the web frontends. Node has a very active and broad community, is very flexible and can be used for different use cases. Above all, it is open source. Compared to compiled backend languages, node is relatively slow. For large applications, many projects therefore prefer alternatives such as Kotlin or Ruby.

Advantages of Node.js for real-time applications

Node.js is particularly suitable for real-time applications that require many simultaneous connections, such as:

• Chat applications: Node.js can connect multiple users simultaneously and deliver messages in real time.
• Real-time collaboration tools: Tools in which users work on a document at the same time benefit from the high scalability.
• Gaming server: Node.js enables the creation of online games where many users interact simultaneously. Due to its asynchronous architecture, Node.js is ideal for these use cases and offers a fast and smooth user experience.

Node.js and the Event-Driven Programming Model

The Event-Driven Programming Model is one of the core components of Node.js that increases its efficiency:

• Asynchronous processing: Node.js uses callbacks that make it possible to execute tasks without having to wait for other processes to complete.
• No blocking due to dead locks: In contrast to thread-based systems, Node.js does not create dead locks, which increases the reliability and stability of the applications.
• Efficient use of resources: Resources are only used when there is really work to be done, which reduces server utilization. The event-driven model enables Node.js to efficiently support applications with high parallelism and performance requirements.

Node.js as a full-stack solution

Node.js offers full-stack developers the opportunity to write both backend and frontend code in the same language (JavaScript):

• Uniform language: JavaScript in the backend and frontend simplifies the code base and promotes rapid development.
• NPM and Yarn: Node.js uses package managers that provide a large number of libraries and modules and accelerate development.
• Easy API creation: APIs can be created easily and quickly in Node.js, which improves interoperability between different applications. These advantages make Node.js a popular choice for full-stack developers looking for a consistent and efficient development environment.