node js presentation pdf

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Learning Nodejs: A Hands-On Guide to Building Web

Welcome to Learning Node js Node js is an exciting platform for writing applications of all sorts Node js is an exciting platform for writing applications of all sorts ranging from powerful web applications to simple scripts you can run on your local computer

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Node

Node js is a server-side platform built on Google Chrome\'s JavaScript Engine (V8 Engine) Node js was developed by Ryan Dahl in 2009 and its latest version is v0 10 36 The definition of Node js as supplied by its official documentation is as follows: Node js is a platform built on Chrome\'s JavaScript runtime for easily building fast and

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How to Code in NodeJS

6 How To Create a Node js Module 7 How To Write Asynchronous Code in Node js 8 How To Test a Node js Module with Mocha and Assert 9 How To Create a Web Server in Node js with the HTTP Module 10 Using Buffers in Node js 11 Using Event Emitters in Node js 12 How To Debug Node js with the Built-In Debugger and C hrome DevTools 13

PDF	Introduction to Nodejs: Using Server-Side JavaScript Node js is a JavaScript runtime environment that lets you run JavaScript outside of the browser It’s often used to build back-end services (your server) Application Programming Interfaces (APIs) are prominent feature of Node js

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INTERNET SYSTEMS NODE

PRESENTATION OUTLINE What is Node js? Design of Node js Modules Web frameworks for Node js Node tools for front-end developers MOTIVATION Node js might be the most exciting single piece of software in the current JavaScript universe — used by LinkedIn Groupon PayPal Walmart etc Node js is one of the most watched projects

How to create a Node.js project using npm?
Start a new Node.
js project we should run npm init to create a new package. json file for our project.
Create a new empty directory in your development environment and run npm init .
You'll then answer a few basic questions about your project, and npm will create a new package.
How to Compile Node.
How to Compile Node.
1Step 1: Download and Install Node. js Source Code.
The first step to compiling Node.
2) Step 2: Install Dependencies.
Before you can compile Node.
3) Step 3: Configure and Build Node. js.
4) Step 4: Run the Make Command.
After configuring Node.
5) Step 5: Install Node. js.

What is Node.js presentation?

Node.js is an open-source and cross-platform JavaScript runtime environment.
It is a popular tool for almost any kind of project Node.js runs the V8 JavaScript engine, the core of Google Chrome, outside of the browser.
This allows Node.js to be very performant.

What Node.js is used for?

Developers use Node. js to create server-side web applications, and it is perfect for data-intensive applications since it uses an asynchronous, event-driven model.
Now that we know what is Node, let's look at why it is so prevalent in web development.

What is Node.js and why should I use it?

Node.js is a JavaScript runtime environment that lets you run JavaScript outside of the browser It’s often used to build back-end services (your server) Application Programming Interfaces (APIs) are prominent feature of Node.js cdn.cs50.net

Pros of Node.js

It’s best to build highly-scalable, data-intensive, real-time applications Can use JavaScript everywhere (client-side and server-side) Large ecosystem of cdn.cs50.net

Setting up package.json

First, let’s set up our package.json Package.json is a universal file in Node.js that contains metadata about the Node packages installed, the project name and description, and other details Run npm init to get one cdn.cs50.net

Creating a simple server with Express, part 1

Now we can install NPM (Node Package Manager) packages Run npm install express to install Express You can read more about Express on their website https://expressjs.com/ This adds stuff to package.json and package-lock.json (a more specific version of package.json we will not touch) and also creates the folder full of our installs called node_modu

Where is my server?

Look for the link to your new Express web server under PORTS in the terminal (right click and click ports if you hid it before) However, this is annoying to do every time, so let’s install another great NPM package that helps us in our development environment (no need to re-open each time) Run npm install nodemon In package.json, let’s type up a s

● app.METHOD(PATH, HANDLER)is

the general pattern for how to handle client requests to a particular endpoint (whether this be via GET request, POST request, etc.) ● First things first—we need to set up a GET request for our homepage Let’s type the following: app.get('/', (req, res) => { res.send('Hello World') }) Sends the text “Hello World” cdn.cs50.net

How to serve up files using Express

We can create html files and use res.sendFile, but we want to serve dynamic content So let’s use a templating engine A well known one is Pug (it also sounds cute) Their documentation can be found at https://pugjs.org/api/getting-started.html Run npm install pug Sets the templating/view engine for Express as Pug ● Write the code: (there are others

Working with Pug, part 1

Let’s create a views directory with our files, and call our homepage index.pug Pug’s syntax can look a bit strange, but it is easy to familiarize yourself with it (and you don’t have to use Pug if you don’t want to) html head title= title body h1= message cdn.cs50.net

Working with Pug, part 2

● Now we can give information from our Express/Node server cdn.cs50.net

directly to our homepage Here’s the code:

app.get('/', (req, res) => { res.render('index', { title: 'Hey', message: 'Hello there' }) }) cdn.cs50.net

Request from the frontend

First, let’s build our simple form This is how it looks like in Pug We need to make sure Express can read our request in a JSON (JavaScript Object Notation: a cdn.cs50.net

comma-separated key:value list) format:

app.use(express.urlencoded({ extended : true})); app.use(express.json()); cdn.cs50.net

Receive the request from the backend

Now in our backend, we have to get the request that was posted Let’s confirm it with app.post('/', (req, res) => { console.log(req.body); }) res.redirect("/"); Hurray Our frontend is sending a request to our backend. Let’s send a response back cdn.cs50.net

Send a response back to the frontend

Select todos Selects all todos Push to array Push to the array Render index with the todolist variable And finally, access the response from the frontend for todo in todolist li= todo else p there are no todos

Some final notes

You don’t have to use SQLite if you don’t want to; if you want to learn more, I recommend using MongoDB if you want to publish your website You don’t have to use Pug if you don’t want to; if you want to learn more, I recommend implementing a frontend JavaScript library like React or Vue for a more professional touch Ultimately, there is no best tec

Node.js Full Course for Beginners Complete All-in-One Tutorial 7 Hours

How to Create PDFs With Node JS and React

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