What is node.js used for

According to Wiki, Node.js is an open-source, cross-platform, back-end, JavaScript runtime environment that executes JavaScript code outside a web browser. The original author of NodeJs is Ryan Dahl and the first release was on May 27, 2009.

Background

For most of its life, the JavaScript programming language has lived inside web browsers. It started as a simple language for modifying small details of web pages but grew into a complex language, with loads of applications and libraries. Many browsers vendors like Mozilla and Google began to pump resources into fast JavaScript runtimes, and browsers got much faster JavaScript engines as a result.

Why to use Node.JS

JavaScript might not be the perfect language for everyone but node.js has real benefits. For one, the V8 JavaScript engine is first and node.js encourages an asynchronous coding style, making for faster code while avoiding multi-threaded nightmares. JavaScript also had a bevy of useful libraries because of its popularity, but the biggest benefit of Node.js is the ability to share code between browser and server. Developers don’t have to do any kind of context switch when going from client and server. Now they can use the same code. And same coding paradigms between two JavaScript runtimes, the browser, and the server.

Node js often, shortened to the node, is a JavaScript platform. A way to run JavaScript, most of the time JavaScript is done in web browsers. But there is nothing about the JavaScript language that we queried to be run in a browser. It’s a programming language. Just like Ruby or Python or C++, or PHP or Java. Many JavaScript runtime bundles are available with all popular web browsers, but that doesn’t mean that it has to perform there. If you are running a python file named myfile.py, you’d run python myfile.py but you could write your python interpreters call it snake woman and run snake woman myfile.py.

Running JavaScript outside the browser lets you do a lot, anything a regular programming language could do really, but it’s mostly used for web development. Okay, so you can run JavaScript on the server. Why would you do this? A lot of developers will tell you that node.js is fast and that’s true. Node.js isn’t the fastest thing on the market by any means, but it’s fast for two reasons. The first is pretty simple, the JavaScript engine is fast, it’s based on the engine used in Google Chrome, which has a famously quick JavaScript engine. It can execute JavaScript like there is no tomorrow. processing, thousands of instructions, a second. The second reason for its speed lies in its ability to handle concurrency and it’s a bit less straightforward, its performance comes from asynchronous workings, the best real-world analogy. I can come up with baking. Let’s say I am making muffins. I have to prepare the batter And while I am doing that, I cannot do anything else. I cannot sit down and read a book. I cannot cook anything else and so on. But once I put the muffins in the oven, I don’t have to stand there looking at the oven until they are done, I can do something else. Maybe I will start preparing better. Maybe if I read a book in any case, I don’t have to wait for the muffins to finish baking for me to be able to do something else.

In node.js. A browser might request something from your server, you begin responding to this request and another request comes in, let’s say both requests have to talk to an external database. You can ask the external database about the first request. And while the external database is thinking, you can begin to respond to the second request, your code isn’t doing two things at once, But when something else is working on something you are not held up waiting.

Other runtimes Don’t have this luxury building by default, Ruby on Rails. For example, it can process only one request at a time to process more than one at a time. You effectively have to buy more servers.

I don’t mean to tell you that node.js is the first state in the world because of its asynchronous capabilities, node.js can squeeze a lot of performance out of one CPU core, but it doesn’t Excel with multiple cores. Other programming languages. Truly allow you to actively do two things at once. To reuse the baking example. Other programming languages, let you buy more ovens so that you can bake more muffins. Simultaneously node.js is beginning to support this functionality, but it’s not as first-class in node.js as it is in other programming languages. I don’t believe that performance is the biggest reason to choose Node.js, although it is often faster than other programming languages. Like Ruby or Python or PHP? I think the biggest reason is that it’s all one programming language. Often when you are writing a web application, you will be using JavaScript. But before a note, You would have to code everything into different programming languages. You’d have to learn two different Technologies, paradigms and libraries. With Nodejs, A back-end developer can jump into front-end code and vice versa. I think this is the most powerful feature of the runtime.

Often other people seem to agree. Some developers have created the mean stack. Which is an all JavaScript web application stack, consisting of MongoDB, a database controlled by JavaScript Express, Angularjs, and node js. The JavaScript everywhere mentality is a huge benefit for node.js, large companies like Walmart, the BBC LinkedIn, and people are even getting behind node.js. It’s not a child’s play anymore.

How to Install NodeJS

A theme of the JavaScript world is an overwhelming number of choices, and node Installation is no exception. There are numerous ways to get Node running on your system. The official download page at https://nodejs.org/download has several links for pretty much every platform Windows, Mac, and Linux. The choice of platform Should be obvious. Choose the one for your operating system. If you are not sure if your system is 32-bit or 64-bit search the web for the answer because you will get a lot of performance benefits from choosing 64-bit if it’s available. Mac and Windows users have the option to download a binary or installer. And I recommend the letter.
If you have a package manager on your system, you can use that instead. Node is available on package managers such as apt-get, Homebrew, and chocolatey. You can check out the official installing node.js for a package manager guide at https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions

If you are on Mac or Linux, I highly recommend the node version manager, NVM found at https://github.com/nvm-sh/nvm NVMW at GitHub https://github.com/hakobera/nvmw, which is a port for Windows users.

These programs will allow you to easily switch between node versions which is great If you want to have the stable version of the node and the exciting experimental pre-release versions. It also allows you to easily upgrade Node when new versions are released. NVM has a couple of other benefits that I like. It’s trivial to uninstall and it doesn’t need administrator (root) access to install it on your system.

NodeJS usages

NodeJS is used heavily used in generating server-side code. But modern cloud platforms Like AWS, GCP, or Azure use NodeJS to run serverless applications as well. NodeJS is also very popular in microservice-based applications.

Conclusion

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