Getting Started With Node Js

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If you're brand new to using Node.js, this guide will help you to get started with some basics.

Prerequisites

  • Howdy coders, In this post we are going to understand some basics of the Nodejs framework .

If you are a beginner, trying Node.js for the first time, we recommend installing directly on Windows. For more information, see Should I install Node.js on Windows or Windows Subsystem for Linux

Try NodeJS with Visual Studio Code

If you have not yet installed Visual Studio Code, return to the prerequisite section above and follow the installation steps linked for Windows or WSL.

  1. So, let’s get started… . Nodejs is an Open source and cross-platform runtime environment for executing JavaScript code outside of the browser.

  2. In other words, NodeJS is a platform which allows you to build scalable network application using JavaScript on the server side .

  3. NodeJS is not programming language but it’s a platform where you can run JavaScript on server .

  4. Node.js Was Created by ‘Ryan Dahl’ . Basic understanding of javascript. Basic Knowledge of Ajax, HTML, CSS and other web technologies will be good.

  5. Node.js is Great for prototyping and agile development. Node is ideal for making highly-scalable, data-intensive and real-time apps. Its used for production in large companies like Flipkart, uber, Netflix, Walmart and so on.

  6. Nodejs uses JavaScript everywhere, so we don’t need to learn any extra languages to dive in.

Using node.js we can make Cleaner and more consistent codebase.

Nodejs has the Large ecosystem of open source libs which we make development process very faster. Node.js is making use of the Google Chrome V8 runtime engine. V8 is written in c++ and that is why it is very fast. Node applications are single-threaded.

Create your first NodeJS web app using Express

Express is a minimal, flexible, and streamlined Node.js framework that makes it easier to develop a web app that can handle multiple types of requests, like GET, PUT, POST, and DELETE. Express comes with an application generator that will automatically create a file architecture for your app.

To create a project with Express.js:

  1. That means a single thread is used to serve all clients. Node applications are asynchronous or non-blocking by default.

  2. That means when the application involves I/O operations (eg accessing the file system or the network), the thread doesn’t wait (or block) for the result of the operation.

  3. It is released to serve other clients. Node.js use event loop is single-threaded by nature. But most the I/O (network, filesystem, etc) is run on separate threads because the I/O APIs in Node.js are asynchronous/non-blocking.

    Organizations are making use of Node.js because of following reasons: .

    Write all code in JavaScript. Easy to modify and maintain. Faster Development time. Better Performance because of Non-Blocking or Asynchronous I/O. Every day more than 500 new packages are published to NPM everyday. V8 is an open source engine written in C++. Rather than treating each JavaScript object as having its own separate class, V8 adds a hidden class that identifies common properties between those objects. V8 translate the JavaScript code into Machine code. the computer processor can read machine code directly. Without this, your browser would have to translate each piece of JavaScript into machine code every time you run a script on a web page. V8 has better garbage collection, which means that when it finishes using memory for one task, it can better reclaim that memory for another task.

  4. So Because of these reasons, it makes javascript faster. I/O Application. Data Streaming Applications.

    Data Intensive Realtime Applications. JSON APIs based Applications. Single Page Applications. Real-Time Web Application like (Chat, Video Streaming, etc…). Network applications. General purpose applications.

    • IOT Applications. You should avoid using Node for CPU-intensive applications, such as a Heavy image manipulaton,video encoding/conversion service or file compression because while executing these operations, other clients have to wait for the single thread to finish its job and be ready to serve them.
    • NOTE : In Node, we don’t have browser environment objects such as window or the document object. Instead, we have other objects that are not available in browsers, such as objects for working with the file system, network, operating system, etc.
    • Thanks for reading. in this post, we have covered some basic introduction of node js so, its good to have some basic knowledge of node.js before we dive into some advanced topic. Do let me know If you face any difficulties please feel free to comment below we love to help you.
    • if you have any feedback suggestion then please inform us by commenting. Don’t forget to share this tutorial with your friends on facebook, and twitter. Node.js is a compelling JavaScript-based platform that's built on Google Chrome's JavaScript V8 Engine. It is used to develop I/O intensive web applications, such as video streaming sites, single-page applications, online chat applications, and other web apps.
    • Large, established companies and newly-minted startups alike (Netflix, Paypal, NASA, and Walmart, to name a few) use it often. Eager to know more?
    • This tutorial will help you in getting started with node.js. Node.js is open-source and completely free, and thousands of developers around the world use it.
  5. The platform brings plenty of advantages to the table, making it a better choice than other server-side platforms, like Java or PHP. Start Learning With Our FREE CoursesEnroll Now. First, we'll go through some of the basic concepts required in getting started with node.js, and then we will create our own Weather App. This application will enable us to search for weather conditions anywhere in the world.

  6. Let us now begin our tutorial on NodeJS by understanding what is node.js. Node.js is an open-source, cross-platform JavaScript runtime environment and library used to run web applications outside the client's browser.

    Ryan Dahl developed it in 2009, and the latest version, v13.8.0, was released on Jan.

    Node.js is used to create server-side web applications and is perfect for data-intensive applications since it uses an asynchronous, event-driven model. Fig: Node.js logo. Now that we have learned the basics of getting started with node.js, let us next learn the architecture of node.js. In Partnership with HIRIST and HackerEarthEXPLORE COURSE. Welcome to the Node.js Quickstart! Here we will walk through the process of getting your API keys, installing the SDK, and making your first API call with Node.js.

  7. If you have any questions, join our Discourse community: https://forum.courier.com/.

  8. Sign up for Courier. Install the latest version of Node.js: https://nodejs.org/en/download/. Navigate to the Courier API Keys page in Settings (https://app.courier.com/settings/api-keys) to get access to all API keys, including production and test keys. Learn more about the difference between production and test keys >.

  9. Run the following command in your project directory to install the SDK via npm:.

Try using a Node.js module

Node.js has tools to help you develop server-side web apps, some built in and many more available via npm. These modules can help with many tasks:

ToolUsed for
gm, sharpImage manipulation, including editing, resizing, compression, and so on, directly in your JavaScript code
PDFKitPDF generation
validator.jsString validation
imagemin, UglifyJS2Minification
spritesmithSprite sheet generation
winstonLogging
commander.jsCreating command-line applications

Let's use the built-in OS module to get some information about your computer's operating system:

  1. Courier Elemental is a new JSON syntax built to describe your notification, including recipient data, notification content, variables, and routing.

  2. Here is an example of a simple notification sent with Elemental:. Replace the JSON within the body to match the type and content of notification you want to send.

  3. There are 4 main properties within this example notification:.

  4. to: provide information used by Courier to identify the recipient of the notification.

  5. Here you can include details such as the recipient’s email address for email, phone number for SMS.

    content: add your notification’s title and body.

    data: include any data you want to pass to a message template. The data will populate the corresponding template variables. routing: customize which channel(s) Courier will potentially deliver the message. If no routing key is specified, Courier will use the default routing configured in the Courier Studio UI.