Web App Development in Node.js

Written by Naveen kolusu|7 min read|
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Being the foremost widespread programing language, JavaScript is additionally one of the foremost universal software package development technologies.

Historically used as an internet frontend development tool, it’s conjointly become a serious cross-platform mobile development tool as a basic technology for an outsized variety of platforms, like Apache Cordova/PhoneGap, React Native, NativeScript, Appcelerator atomic number 22.

But the areas of application for JavaScript don’t finish here. Lately, there has been plenty of buzz around the use of JavaScript for server-side programming. one of the tools that indicated this shift in internet development was Node.js.

Node.js

Node.js is truly not a framework or a library, however, a runtime atmosphere, supported Chrome’s V8 JavaScript engine.

The technology was initially introduced back in 2009 by Ryan Dahl at the annual European JSConf and was straightaway recognized as “the most enjoyable single piece of software package within the current JavaScript universe”.

As an associate degree ASCII text file project, Node.js was sponsored by Joyent, a cloud computing and hosting solutions supplier. the corporate invested with during a variety of alternative technologies, like Ruby on Rails framework, and provided hosting services to Twitter and LinkedIn. The latter conjointly became one among the primary firms to use Node.js for its mobile application backend. The technology was later adopted by a variety of technology leaders, like Uber, eBay, Walmart, and Netflix, to call a couple of.

node js trends

Node.js IDEs . Almost any popular code editor has support and plugins for JavaScript and Node.js, so it only matters how you customize your IDE to your coding needs. But, many developers highly praise special tools from VS Code, Brackets, Atom, and WebStorm.

Frameworks. exploitation middleware over pure Node.js may be a common apply that produces developers’ lives easier. We have a separate article examination common Node.js frameworks, wherever we glance at categorical.js, Meteor, Sales.js, Koa.js, Keystone.js, and Loopback.js.

Node.js strengths and weaknesses create it the topic of a heated discussion. to line the record straight, we’ve analyzed each – Node.js execs and cons – in a trial to search out out what comes will like this technology alternative.

Node.js IDEs. virtually any common code editor has support and plugins for JavaScript and Node.js, therefore it solely matters however you customize your IDE to your secret writing desires. But, several developers extremely praise special tools from VS Code, Brackets, Atom, and WebStorm.

The Benefits of Node.js

Robust technology stack

JavaScript has evidenced to be Associate in Nursing undisputed leader among the foremost common programming languages. In turn, Node.js has become a complete name within the business. With a complete of 368,985,988 downloads and over 750 new contributors as expressed in the Node-by-numbers report 2018, the project looks to be stronger than ever.

Using Node.js for backend, you automatically get all the pros of full-stack JavaScript development, such as:

  • better efficiency and overall developer productivity
  • code sharing and reuse
  • speed and performance
  • easy knowledge sharing within a team
  • a huge number of free tools

Consequently, your team may be a heap a lot of versatile, the event is a smaller amount long and as a result, you get a quick and reliable software package. Developers trained in frontend JavaScript will begin programming the server-facet with minimum effort. With identical language on either side, you’ll utilize code on the frontend and therefore the backend by wrapping it into modules and making new levels of abstraction.

Despite a typical belief, being a full stack developer you’re in no manner restricted to the standard MEAN (MongoDB, Express.js, AngularJS, and Node.js) stack. the sole must-have during this case is Node.js (there isn’t any various in JavaScript for backend programming). the remainder of the technologies inside this stack area unit ex gratia and should get replaced with another tool providing similar practicality.

Non-blocking Input/Output and asynchronous request handling created Node.js capable of process requests with no delays. within the context of the backend, the synchronous process assumes that code is dead during a sequence. Thus, every request blocks a thread, creating alternative requests look ahead to it to be finished. The asynchronous process permits requests to be processed while not interference (non-blocking I/O) the thread. therefore once an invitation is processed, it will push a recall and continue serving requests. That helps Node.js build the foremost of single threading, leading to a short interval and coincidental process.

Another side is that the event-based model. once employing a common language for each client/server-side, synchronization happens quick, which is particularly useful for event-based, time period applications. because of its asynchronous, non-blocking, single-threaded nature, Node.js may be an in style selection for on-line play, chats, video conferences, or any resolution that needs perpetually updated knowledge.

Scalable technology for microservices

Since it’s a light-weight technology tool, using Node.js for microservices design may be a nice selection. This type of architecture is best delineated by Martin Fowler and James Lewis as “an approach to developing one application as a set of tiny services, every running in its own method and human activity with light-weight mechanisms, usually associate degree hypertext transfer protocol resource API.”

The Drawbacks of Node.js

Performance bottlenecks with significant computation tasks

The biggest disadvantage of Node.js even now’s its inability to method central processor sure tasks. But, to grasp the roots of this issue area unit, we want a touch little bit of context. Let’s begin with the fundamentals, with JavaScript itself.

As we know, Node.js may be a runtime atmosphere that executes JavaScript on the server facet. Being a frontend artificial language, JavaScript uses one thread to method tasks quickly. Threading isn’t needed for it to figure, as a result of tasks in JavaScript area unit light-weight and take very little central processor.

Turning back to Node.js, currently, we all know why it’s thought of single threaded: It processes JavaScript, which is a single rib. A non-blocking input/output model means Node.js answers the shopper’s decision to start out an invitation and processes the task throughout the time it shoots recall because the task is prepared. process tasks asynchronously, Node executes JS code on its single thread on an occasional basis. that’s what known as associate degree event-loop.

The problem happens once Node.js receives a central processor sure task: Whenever an important request involves the event loop, Node.js would set all the {cpu|central methods unit|CPU|C.P.U.|central processor|processor|mainframe|electronic equipment|hardware|computer hardware} obtainable to process it 1st, and so answer alternative requests queued. That leads to a slow process and overall delay within the event loop, that is why Node.js isn’t suggested for significant computation.

However, in 2018, multithreading was introduced in Node.js as associate degree experimental feature with the ten.5.0 update. a brand new feature known as employee threads module will be accustomed to leveraging further threads from a thread pool, to hold central processor sure tasks. however which will be done solely on machines with multiple cores, as Node.js still permits you to use one core for one thread. meaning that significant parallel processes will be dead on a distinct thread. This feature is remaining experimental in Node.js version twelve however has been considerably improved.

Callback hell issue

Due to its asynchronous nature, Node.js depends heavily on callbacks, the functions that run once every task within the queue is finished. Keeping a variety of queued tasks within the background, every with its recall would possibly lead to the alleged recall hell, that directly impacts the standard of code. Simply put, it’s a “situation wherever callbacks area unit nested inside alternative callbacks many levels deep, doubtless creating it troublesome to grasp and maintain the code.”

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