Node JS



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3 hours
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Welcome to the Training on Node.js Tutorial. Lets understand the importance of contents of this Node.js Tutorial. Node.js is a runtime environment from JavaScript to develop server based web applications. The Node package manager is one of the biggest open source libraries. This Node.jsTutorial course will cover the following topics within:

  • Introduction
  • Callback Concepts
  • Methods
  • Events and Events Loops
  • REPL interpreter
  • Buffer creation, reading and writing
  • Installing and removing via Node Package Manager
  • Streams
  • File Systems
  • Global Objects
  • Utility Modules and Web Servers

The examples in the Node.js Training are developed in Windows, but the scripts will work perfectly well in Linux and Mac OSX. Node.js is extremely scalable and fast. Though it uses a single threaded model along with event loops, it is still very fast and can handle nnumber of requests as well. It is recommended not to use node.js for multi-threaded or more specifically for cpu intensive works. This Node.js Tutorial will take you through all the basics and will also cover intermediate topics.

Node.js Trainingl is a robust and strong application and server technology massively changing workflows of advanced developers. This is a totally free technology, mode allows developers to come up with native software and servers through JavaScript programming. This ensures that developing products through latest technologies such as Web Sockets and HTTPs and come up with dynamic content with essential framework.

Node.js Tutorial is a modular tool ensuring freeness of availability of units that provide highly advanced solutions to essential problems and can ensure use of minimal code. Currently, Node.js Tutorial has close to 200,000 fee-less modules producing any part of the workflow as comprising an off the shelf answer. This can reduce development time as well as costs and is the reason why free server platforms are tried out for modern web applications.

Within an asynchronous event driven framework, node.JS is for coming up with scalable network applications. Several connections can be managed on a concurrent basis and within each connection, call-back undergoes firing yet no work can be performed.

It is in opposition to common concurrency models where OS threads are employed. Thread linked networking is not efficient and tough to apply. Those using Node.JS are free from deadlocking the process and there are currently no locks. While the function in the node does not perform I/O, there is never blockage of a process. As nothing blocks this process, programmers with less expertise are even able to come up with systems which have scalability.

Node.JS is akin in design to systems like Ruby

Event Machines or the twisted by Python. Node.JS carries the model slightly further and creates an event loop in the form of a linguistic construct as against a library. Within remaining systems, there is a blocking calls for commencing the event loops. Node enters the event loop for execution of the input script. Within the node, there exists a event loop during which lack of callbacks are performed. This is why the browser is concealed from the view of the user.

Within the node.JS, HTTP is designed to ensure streaming and latency. This ensures the node is well perfected for building the web library as well as framework. As Node.JS is developed without the threads, multiple cores within the environment will not be used. JavaScript has been associated with a lot of modifications and the extent of web developing is massively different today.

JavaScript is operating within the server and browser in ways that were difficult to visualize previously. Prior to digging within node.js, benefits of JavaScript are used over the stack forming the language as well as data format. This ensures optimal reuse of developer resources. There is a moot advantage to incorporation of node within the stack. Node.js is a well formed compilation of the JavaScript V8 engine. Alongside this is the online platform, abstraction surface and core library primarily composed in JavaScript.

Node.js has been created by Ryan Dahl with the view to create websites in the real time with push capacity. These are inspired by apps like Gmail. Within Node.js, he provided developers tools for work in non-blockage of event linked I/O paradigms. Following twenty years of stateless web based on request responses paradigms ensures web applications with real time, 2 way connections.

Node.js is perfect for web apps that are real time using push-control technologies through web sockets. Web applications with 2 way, real time links between clients and servers can initiate communication. This allows free exchange of data in contrast to the web response network.


Node.js Training: The Highlights

We have specified some highlights of Node.js Tutorial. Lets understand some of the below points:

Sandboxed ecologies trying the web as transport protocol can be given to the client alone and operated through ports which are non-standard. Node.js is an important step for playing a crucial role in top profile companies which look for unique benefits. The benefits are translated into efficient time allocation as well as functional operability.

Node.js is a non-blocking, event linked I/O for remaining efficient and lightweight. Data intricate real time apps across distributed devices. Node.js is not a magic bullet fresh platform in the web evolving universe. This platform meets specific needs. This is a platform that is not used for CPU rich operations. One uses it for detailed and extensive computation that will solve all the problems. As node is excellent for dealing with numerous connections with massive throughput associated with high scalability, its operations are considerably complicated.

As against conventional web serving techniques where every connection needs a fresh thread, detailed RAM system and maxing out of available RAM, Node.js works using a unitary thread and nonblocking I-O calls leading to concurrent connections. Every thread has around 2 MB equivalent memory running within a system with 8GB RAM placing it at virtual maximum of 4000 concordant connections and cost of context-switching associated across threads.

Node.js alters scaling levels of over IM concurrent connections. Coming up with a single thread between client requests and the potential drawback of composing node.js apps is as follows. Essentially, heavy computation can cause a problem for single threads of the Node and clients using it. This is because incoming requests will be blocked till computation has been finished. Developers also need to check to ensure exception reaching up to the core event loop causes the node.js example to end thereby closing the program.

This technique is used for the purpose of avoiding exceptions bubbling back to the top thereby passing errors associated with the callback parameters. In case some unhanded exception is created, numerous paradigms and key tools are there for monitoring the node procedure and the recovery of crashed instances. The most popular of these are the forever modules or different approach associated with exterior outer system tools. This should not be left out as wired in support for package managing through the NPM tools with every single node.js installation. Module ecosystem is available for all and people can publish their particular module in the NPM repository. Some common N-P-M modules are express and connect.

Node.js Tutorial excels with real time apps and ensures a quick fit for revealing data from object DBs.

Through this approach, responsiveness of the heavy load is essentially helpful when firm confirmation of correct data write is not needed by clients. Essential examples include logging or composition of user tracking data, processing in batches and no use till a later time. Data undergoes queuing through caching or message queuing infrastructure. This is included within a separate database batch write method and computation intensive processing services that are backended.

It can be written in the better performing platform for these tasks and behavior can be implemented with linguistic frameworks not on the same hardware with the same high, maintained throughput. Through the Node, one can push the database write off to a side and associate with these later, proceeding as if one is succeeding. Across more traditional web platforms, HTTP requests and responses become isolated events which actually work as streams. This observation can be used in node.js for creating amazing features. This could be done for real time audio or video encoding and proxying linked between data sources.

Node.js is used as a server side proxy when a large amount of simultaneous connections in a manner which is non-blocking manner. This is useful for proxying varied services with different types of response times or collection of data from numerous source points. Keeping in mind the server side app, communication with third party resources ensures pulling in data from associated sources or storage of assets such as images and videos to 3rd party cloud services.

While dedicated proxy servers do exist, this Node is essentially helpful for proxying infrastructure is not there or if a solution for local development is needed, one can build client side apps with the node.js evolution. In production, one can handle such interactions through key proxy services.

Coming back to the application level, when desktop software dominates and can be replaced with current time web solution refers to brokers’ trading software, tracking stock prices, carrying out calculations as well as technical analysis and creation of graphs and charts. Making the transition to real time web based solution to enable those who are brokers to switch to the work station or working places.

Who Should Learn Node.js Training?

  • Students
  • Professionals
  • Website Designers
  • Website Security Testers

Node markets is an asynchronous, event linked framework constructed on JavaScript engine and it is perfect for creating network applications which possess scalability. This is basically JavaScript plusC/C+++ under the hood for interacting with the file system, starting on HTTP or TCP servers and more.

This node is single threaded and employs a concurrency model associated with the event loop. This is no blocking so the program cannot wait and registers a callback letting the program persist. This can scale in sequential language to ensure HTML content of the page.

Within the node, callbacks can be registered. Node.js is perfect for those who perform important tasks and not buffer data into memory and instead outputting it chunk by chunk.

There is a significant difference between existing event loop systems and node.JS. Within the node, all of the libraries have been created from ground up to be non-blocking between themselves and the Node.

Within the node, all the libraries have been created from ground up to be non-blocking yet the same cannot be agreed for others. Node is ideal for I/O bound apps and not so much for CPU heart apps.

Data intensive real time applications, JSON APIs and single page applications as well as data streaming applications are some of the other desirable features of node.js.

Apart from corporate workers and students, professionals can also work for the benefit of their individual projects using node.js.

Who is this course for?

Pre-requisites for Learning Node.js Tutorial:

  • Basic Computer Knowledge
  • Passion to learn
  • Basic Programming Terminologies
  • JavaScript
  • Knowing CSS and HTML will be an added advantage

To understand HTTP is one of the prerequisites for understanding the client and server paradigm and acquiring understanding of Node.js Tutorial. Verbs such as Get, Post, Put, Delete and Rest based mechanism can involve code on server side.

Prerequisite of Node.js Tutorial also includes knowledge of JavaScript and familiarity with nuances of programming language and the model. What can be used to understand the semantics is also an important precondition for learning node.js programs. It is a very different programming model and without comprehension of the same, an efficient code cannot be composed.

Client rich framework (Angular, Backbone, Ember) and the server side API that is associated with JSON ensures that learning node.js becomes easier. Using JavaScript, the information can be converted to server side framework and the data from HTTP to JSON on the server side objects. Through use of JavaScript across the app, practical applications of this software are available. JavaScript is consuming the entire world and it runs on every PC in the world. Node.js is a JavaScript runtime using V8 engine put together by Google for Chrome.

V8 compiles and executes JavaScript at very fast speeds into native machine code. As it goes lightning fast, JavaScript event loop provides amazing results. Event loop is a unitary thread performing I/O operations in a synchronous manner. These operations run synchronously or asynchronously through parallel threads that work. This previous approach consumes considerable money and is difficult to program. When a Node application is performed through an I/O operation, this sends an asynchronous task to the event loop along with a function that is callback and the execution of the rest of the program.

While a sync operation finishes, event loop returns within the task for call back execution. Reading as well as writing to network connections, filesystems and database are very rapidly constructed and reading/writing as the database- which are very common tasks in web apps execute very well in Node. This allows the construction of fast, scalable network apps that can manage simultaneous connections with quick throughput. NPM is a node.js package manager resembling managers from other ecosystems which is consistent, fast and strong. This is also ensuring specification as well as installation of project dependencies.

Packages were isolated from others avoiding version conflicts. Global installs of shell commands and platform dependent binaries were also in consideration. Through Node.js enables the use of the same language for the client, server and database, data is native JSON format from browser to disk. Node.js is perfect for concordant connections which make sense for use with real time web apps and multiple users like chats and games.

The event loop also covers multiple user requirement. Real time power is through web socket protocol which involves two way communication channels associated with the client and the server. Server can release data as quickly as the client can leading to avoidance of overhead of HTTP.

Web frameworks treat HTTP requests and responses as whole data objects and are I/O streams. Node.js ensures audio or video files while uploading cut down on overall processing time. Node.js will enable writing of JavaScript on the client as well as the server making it easy to send data between client and server. This runs on the same codebase on client and servers and enable writing client code saving it directly to the database. Then the data is automatically saved in the server and vice versa. Data changes on server are automatically sent to the client. This gets better as the data reacts automatically and updates itself. Inherent risk with any open source project is eliminated with node.js.


Node.js Training Objective:

To enable developers to code and develop server side web based input output applications, data streaming applications and also real time data intensive applications. This Node.js Tutorial will also take you through the JSON API based applications.

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Study method describes the format in which the course will be delivered. At courses are delivered in a number of ways, including online courses, where the course content can be accessed online remotely, and classroom courses, where courses are delivered in person at a classroom venue.

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CPD stands for Continuing Professional Development. If you work in certain professions or for certain companies, your employer may require you to complete a number of CPD hours or points, per year. You can find a range of CPD courses on, many of which can be completed online.

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A regulated qualification is delivered by a learning institution which is regulated by a government body. In England, the government body which regulates courses is Ofqual. Ofqual regulated qualifications sit on the Regulated Qualifications Framework (RQF), which can help students understand how different qualifications in different fields compare to each other. The framework also helps students to understand what qualifications they need to progress towards a higher learning goal, such as a university degree or equivalent higher education award.

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An endorsed course is a skills based course which has been checked over and approved by an independent awarding body. Endorsed courses are not regulated so do not result in a qualification - however, the student can usually purchase a certificate showing the awarding body’s logo if they wish. Certain awarding bodies - such as Quality Licence Scheme and TQUK - have developed endorsement schemes as a way to help students select the best skills based courses for them.


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