Node.js Tutorial in Hindi #1: Introduction to Node JS

Hello what's up guys and welcome to our brand new series on node and express j Yes guys I am super excited about this series and I hope you are also equally excited because recently we have completed the series of version 19. Now we are going to start Node and Express and first of all today we are going to see Introduction to Node. Before starting the video, I would like to tell you that we are going to understand each topic in depth. Guys believe me you are going to have a lot of fun so guys first of all let's start with definition so you can see what is nuts here as everyone asks you questions you also have a question in your mind and at the end I will ask you a million dollar question, then guys, it will be fun to watch, all doubts will be cleared only today in this one video, What is Not Jas, Why we need Nod Jas, What are the advantages of Nod Jas and where Nod Jas is used, okay? So first of all what is Nut JS it is an open source server side JavaScript run time allows you to run JavaScript on your machine and a server, look anywhere you pick the definitions of any website everyone will say the same Note JS what is it an open source Source Cross Platform JavaScript Run Time Innovation Which Allow Your JavaScript Code to Run Outside Your Browser Basically on Server So there are many words that may come in your mind oh my God what is this open source meaning what is this server Side What is this JavaScript Runtime Brother? What is this JavaScript Runtime Time Evolution? I also used a word cross platform, then we can run the JavaScript code outside the browser, but how can it be written and how can this be done? And one more. The thing is that note how it is made, it is made on v8 JavaScript engine, it is given for speed, there is one more thing, we will see it later, this is the particular line, but you understand, Robot Ecosystem with NPM, okay, on top of NPM. Also a very good history, many people think that its full form is Note Package Manager but it is not, it is just a package manager, okay then we will come there but the most important thing for us guys is that this particular box. Now we will understand in depth what I am keeping inside, first of all what is this open source, so here you can see that open source means that the source code of nut is publicly available. Okay, I basically if here I will click on this particular and it is basically opening here, so what you see is this is the official node in the repo gt hub and here you guys look at this node, so here guys you will get all the source code of this particular. What code has been written to make the Nat JAS application, basically how it has been written, you will get everything here, you can see Guy's Pull Requist here, you can see the issues here which these people are currently facing. There is a discussion, there are many things here you can do, so this is guys, what is your repo of nut jae official repo, okay so it is open source, it means that the source code of nut jae is publicly available, now what is the benefit of it? Look, any one can view that source code, any one can view that source code, so this done, any one can modify this source code, anyone can modify it, but to reflect the modify actually in your repo, we need to Contribute We have to share the request that yes this particular is an issue or a bug and I have written the code in this way, if you add it, it will be better, so open source means anyone, just note, not yours. Even React is also open source. There are many such things which are already open source, meaning whose source code is publicly available, which you can see, modify and become a contributor. How awesome would it be, guys, that you can see it here. We have a contributor, I show it in the overview, if we go to So these are the people who together created this, then if your icon comes here, how would you enjoy it, right? You can also say brother, note that I also have a hand in it. Right so this is your open source, okay now one thing comes, what is this cross platform is very simple, cross platform means that if you write any code in which you can run it in multiple operating systems without any problem. Any major updates or changes are fine like we have a Windows then we have a Mac and then we have a Mac also read it, what will I write, I will write the code note, just copy paste, if you go, I mean Mac, you will also run. It will be done. There is an investment where your JavaScript code is, it runs. What is this? This is an investment for example. Tell me one thing that whenever you talk about JavaScript, what is the first thing that comes to your mind? There will be only one thing and that is it is a building block of web development mostly in your front end like we have ATML we have a CSS third no matter what is your JavaScript which you work in front end let's click any button you So when you go to the website and click on the blood button, something pops up or you get redirected to another page. How it happens with the help of JavaScript. So there is no doubt that we run JavaScript in the browser. Okay, but what if you run the same JavaScript outside the browser, basically in the server, then how will it be? Right, we need something, we need someone's help to do that work, so to do that work, we need a person. The environment seems to be there and the same environment gives you a note, what does it provide? What does Nut provide? What is Node? Node provides you an environment with the help of which you can now run the JavaScript code not just in the browser but outside the browser basically. You can also run it in the server, this is it, JavaScript Run Time Environment means an environment that has to be provided to run the JavaScript code outside the browser, it is written by Simple Write, now it is clear to you then JavaScript. Run Time Evolution JavaScript needs an evolution to run. Note that it provides it. Alright now it provides tools to interact with the system like if you have to read, delete or update files on the server, then not with the help of JavaScript. You can do that with the help of nut js, that is and by the way by default it provides us built in modus file system with the help of which we can read and write files very easily then if you have a If we want to create a network, then we have HTTP request for that also, we can use that, because now obviously if anyone logins or registers with Lets, then his data is stored in the database and a front end data is sent to the database. So in the middle we have back end, so what does that mean, who does that work, what does that node do and this is what helps you, basically it is simple to connect your front end to the database, so here you will get everything. You will get it, I hope you have understood this one line and on the basis of this, in the end, I am going to ask you a million dollar question. Alright now, this is node.js special as a run time, right, so first of all, see the v8 engine very clearly. Can you use node.js? What is google2 machine code? Making it lightning fast and what it uses. What was told a little while ago? Like FS, we have an FS for what, so that we can play with the file system. We have an HTTP module through which we can access servers. You can play with and you can build powerful applications without extra libraries, basically this is where you get a lot of things, right so now let's go a little further and understand why do we need this, so first of all Look guys, it is very simple whenever we create any application, basically full stack application, what was earlier html-pdf, min stack, min stack, then JavaScript became such a common language that now you can use it in front end also. Yes, you can use it in the back end also. With the help of Mango DV, we can also use it in a bank i mean database, so how easy it has become, now you can use the same language in the front end as well as in the back end. And then you are able to use it in database also so single language for full stack development simple right then high performance thanks to the v8 engine obviously less note is just super fast see when we do then you will know now the guy third one you see Can you do event driven and non blocking IO? Okay, if I show you this then you can see it in this way, now look unlike traditional server that blocks a thread for each request, meaning if now there will be single thread then guys till the time you make a request That request is not completed, the second request will not work, the third and fourth request is getting blocked, until the first one is not completed, the rest of the subsequent ones are not going to be done, but in node dot this is not the case, like simple, neatly multiple, this work. Can do simultaneously and thanks to asynchronous models well that's no I mean no just using it making it highly efficient for handling multiple tasks right and then you can see scalable for modern applications with the help of node. js you can create a chat application streaming platforms and then online games Alright now it must be coming in your mind that which are the big tech companies which are using or using node.js then it is very clear here. You can watch We Have A Net from netflix.in If you use it like this then guys why are you behind? Now stay with me through out this series believe, you will enjoy version 9. We have already completed it. Now it's node and then on express and [ __ ] dvi so I'm already uploading the video okay guys so now it's a million dollar question and that's not it is it a language and a framework what is this react It is a library, isn't it? Angular framework is naked. Many of us also call it a library made through React. So, what is this? Node.js, is it a language or what is it, tell me what is it, and this is. It's guys, neither is it a language nor is it a framework, it is a JavaScript run time environment with the help of which now you can write JavaScript code not only in the browser but also in the server outside the browser. This is it, this is what you have to say. node.js is your JavaScript run time environment with the help of which you can now write JavaScript code not only in the browser but also outside the browser. That's all for this video. I hope you would have liked the video very much where today we saw the introduction. To node.js and node.js, everyone will come to this. Open source cross platform JavaScript run time evolution that allows your JavaScript code to run outside browser based mostly on server but we have no idea what was happening brother, what is this, what does it mean but I tried to explain each and every thing to you and lastly I cleared the doubt that you had, so I hope you got as much as you were waiting for. After react version 19 it's worth it. Glad to see you, learned a lot today. I would like to meet you guys. Please, if you like this video then please like it as much as you like. I will be very happy. Share it widely with your friends. If you like then you can also record the video with your mobile on instagram2 guys. I will post it in my story, isn't it a very good thing and also you comment if you are having any doubt but I don't think any doubt will come but you watch the video one more time, everything is going to be clear and guys we will move ahead. You are going to see a lot, a lot more is coming, so I don't want you to miss such awesome videos, so if you haven't subscribed yet, please do so. A red bell icon will appear on the right side, hit it so that Do n't miss such awesome videos daily and mostly I upload videos every day at 4:00 pm, so you must open the channel at 4:00 pm, okay and yes, if you are interested in React version 19, then I have uploaded it. If you have completed it recently then please do check out that series also. Alright guys, this is PPT, it is notes, I will share everything, you will get the link in the description and comment section below, so guys, see you in the next video till then guys, thank you. So Much Take Kiya [Music]