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Top reactjs development companies

Top 5 React.JS development companies in 2019

Top 5 ReactJS development companies in 2019

ReactJS is the very latest JavaScript open source library majorly utilized to split pages or features into smaller parts of reusable components. With the help of ReactJS a website can be developed by a combination of multiple components, which are built on the top of the other components. ReactJS, created by Facebook, is also used by the other popular companies including Yahoo.

ReactJS is currently used by the most popular websites like, Netflix, Imgur, Bleacher Report, Feedly, Airbnb, SeatGeek, HelloSign, Walmart, and others. It is backed by a community of ReactJS developers who come up with a sophisticated web application using the cutting-edge features of this JavaScript library.

Top 5 ReactJS App Development Companies

1.CronJ – CronJ is one of the early adopters of Node.js, React.js, Angular.js, MeanStack & array of JavaScript stack. They provide fixed bid ReactJS development as well as the monthly based ReactJS developer hiring model which suits the customer requirement. Their developers are well versed with the latest JavaScript technologies. CronJ is one of the top ReactJS development companies in the country. CronJ’s developers are very competent and perseverant. If you are looking for a seamless web and mobile app solutions, then CronJ is considered as the best ReactJS development company.

top reactjs develpment companies
Cronj IT technologies Pvt Ltd

Benefits of Hiring React Developers from CronJ

  • Dedicated developer working only on your requirement
  • 20,000 + hours of ReactJS experience
  • 15 + Projects developed & delivered
  • 10 + Open source project contribution
  • They deliver project across the globe
  • 100% Confidentiality Assured with Strict NDA terms.

    Website – https://www.cronj.com/

2. WebClues Infotech – WebClues Infotech is a web and mobile application development company that offers effective and successful solutions. They are known to deliver to numerous services such as web development, branding, cloud computing, web design, and mobile application development. Founded in 2014, WebClues Infotech has strived to become the optimal solution to your needs in terms of Website Development, Web Design, Web Hosting, Enterprise Solutions, Android and iOS Technology.

Website – https://www.webcluesinfotech.com/

Webclues

Also Read: Angular vs React explained in detail..!!

3. Inwizards Inwizards is one of the highly structured, performance focused and customer-centric organization. Inwizards follows the idea of development and sustainable to bring about a change in the quality of services and business. Started in 2009, Inwizards is mostly specialized in Website & Mobile App Development, E-Commerce Solutions, React, React Native, PhoneGap, Titanium, etc.

Website – http://www.inwizards.com/

Inwizards

Also Read: React vs Angular2: You should know the difference

4. iGnovate Solutions – iGnovte Solutions is a Chennai based application development company specialized in building MVPs for the startups. It is mainly focused on creating compelling user experience design digital experiences and building topnotch highly scalable web and mobile applications for startups and SME’s. iGnovate has been able to successfully deliver exceptional and scalable applications with React.

Website – http://www.ignovatesolutions.com/

Ignovate Solutions

Also Read: React vs Angular vs Vue: A complete comparison

5. Bacancy – With 100+ developers, situated on the different countries, Bacancy Technology delivers value and high performance at every stage of product development, from planning to delivery.

Website – https://www.bacancytechnology.com/

top reactjs develpment companies
Bacancy

Reactjs developers 6 pro tips

6 Pro Tips from React Developers

If you’re new to ReactJs, you could benefit from learning from the success and failure from react.Js developers. Here are the 6 pro tips from react.js developers.

React Developers Pro Tip #1 

– Use the functional components, if you do not need internal state or lifecycle methods. Here’s a class-based component, that really ought to be a functional component, now, it’s a pure function that accepts props as this argument and returns a react element. The advantages of functional components are there’s less code so it’s easier to understand the component is stateless so you don’t accidentally store state on a component that you shouldn’t. The component is simpler to test, there’s no this finding and it’s easier to see when and where to extract smaller components which leads me

React Developers Pro Tip #2

– To keep your components small, small components are easier to read tests maintain and reuse, for example, a comment component, it contains a comment div with a user info tip inside of it along with the division for comment text and comment date but if I’m going to use this user info information during my application, I can extract this into its own component. In this case, a functional component is neatly tuck, the user info component within my common component and wherever else in my application that I’ll need it, since I’m now in a functional component I do not require the dots, so they’ll get deleted and if I wanted to make this even more modular I could take out this block of code make it into its own Avatar component, then switch this out and nest avatar, now I will have  my Avatar component within my user component, within my common component they are compact and very simple to read Reuse and maintain.

React Developers Pro Tip #3

Understand how to handle ‘this’ remember tip 1, since functional components don’t require this binding you’ll want to use them whenever possible but if you are using an es6 class you’ll want to bind this manually, since react doesn’t auto bind the functions within that component here are several methods for doing so.

One method is to, Bindin render. So this way is concise and clear and works, but it can cause a little performance issue because a new function is going to be called every time this component re-renders which could be very frequent. Another option is to use an Arrow function render. So this is concise and clear, like method one, but like method one it will also create a new function every time, this component renders another method is to Bind in the constructor. So this is going to resolve the possible performance issues of methods 1 and 2 – just don’t forget to call super here in the constructor, another method is to bind in the Arrow function of a class property. So this is much clean and readable and it’s going to ignore performance issues of methods 1 and 2 and avoids the repetition of method 3, please be aware, however, this method relies on experimental features and it’s not an official part of the ACMA script specification. You can allow experimental language features by installing and configuring the babel package and apps created by a create react app has many features enabled.

React Developers Pro Tip #4

Use a function in SetState, not an object. According to the react Docs, react does not guarantee that state changes are applied immediately, therefore, reading this state right after calling set state is a potential pitfall, because the dot state may not be actually what you think it is,  instead of updating state with an object we can update it with a function. Function will accept the previous state as its first argument, and the props at the time the update is applied as it’s the second argument.

React Developers Pro Tip #5

– Utilize prop types, prop type is a library for type checking props and it can help to prevent bugs by ensuring you are using the right data types for your props, it is an external library so you’re going to install npm or however, you prefer installing then import the library and add prop types to the component, set the data type accordingly and if it’s needed add is required.

React Developers Pro Tip #6

–  Use react developer tools, let’s take a look at the features, now looking at any web application built in react, we can notice in the react tab we can view the component hierarchy and if we were to click on a component, we can view the props as well as the state of that component so as you can notice this is a very valuable and very helpful tool to test and debug and really understand what’s happening with your app. If you have any more react tips, I’d love to hear about them in the comments.

Happy coding 🙂


React vs Angular vs Vue

React vs Angular vs Vue: A complete comparison

Angular vs React vs Vue: Selecting a front-end framework can be a difficult and confusing process, you’ve heard of Angular.Js and React.Js there’s this new thing called Vue.Js But, you don’t have time to learn all three, so how do you choose whatever you do not overthink that  can be successful with any of these frameworks, also learning one framework makes it easier to learn another as you learn everything you need to know about a framework. Searching for Best AngularJs Development Services Company?

  • You won’t just learn about that specific framework, but also, you’ll learn about these Shared concepts,
  • Architecting single page applications or spa’s designing and developing components
  • Understanding how data flows through an application properly,
  • Managing state templating and
  • Data binding working with back-end API’s
  • Handling client-side routing using language abstractions like, SAS and typescript
  • Applying testing and all of its variant forms and
  • Leveraging front-end builds react offers easy lightweight component creation,
  • Functional stateless components are about as easy as it gets

Additionally, React’s elegant API encourages you to embrace composition using components. React as a very popular evidenced by its large supporting community and it is especially popular with startups the availability of a wide variety of open-source community developed extensions for react gives you a lot of choices for building out complete solutions.

Component templates

React vs Angular vs Vue

which are written using JSX, not native HTML so expect a bit of an adjustment period and because of its focus on building new eyes. You’ll likely need to extend react with third-party libraries, luckily there are lots of great choices or fulfilling almost any requirement but having more choices can be overwhelming or confusing. Especially for beginners, angular is an all-inclusive framework that provides more in the box than React.Js or Vue.Js, because of this, it provides more guidance on how to build complete solutions and it’s focused on application development that makes it popular with enterprises. Searching for Best ReactJs Development Services Company?

Angular’s large API has the steepest learning curve

React vs Angular vs Vue

Angular has the most capable CLI of the three frameworks, typescript offers developers with less JavaScript experience, a friendlier transition to client-side development and while it’s binding syntax takes a bit to get used to being able to leverage native HTML and CSS for component templates and styles and it is a plus. Angular’s large API has the steepest learning curve of the three frameworks, the Angular code can also feel verbose and complex at times when compared to the reactant view. Vue scaled-down experience offers an easy on-ramp for developers who are newer to client-side development, while still being capable enough to grow with you and while it’s not as inclusive as angular view does offer more in the box than react this makes it a popular choice for the beginners.

Vue.Js is newer than both ReactJs and AngularJs

React vs Angular vs Vue

Vue.Js also allows you to leverage your native HTML and CSS skills and it’s known for its well-written documentation. Vue.Js is newer than both react and angular so while its community is growing, it’s not currently as established or as big as the others when deciding on which to use think about your situation or requirements.

If you’re looking to land a job as a developer,

  • What are the employers in your area are looking for?
  • Do they want to work with the startup or our more established enterprise?
  • Do a survey of local job openings or talk with the recruiter which framework has the most active local community,
  • Get out and attend a local meetup that’s focused on ReactJs, AngularJs or Vue.Js and meet other developers who are passionate about those frameworks.

If you’re selecting a framework for your team’s next project, what does the collective skill set for your team look like, do they have a lot of  general JavaScript knowledge, which our team benefit from selecting a framework with a gentler learning curve and what features are very important for the application that you’re building.

The Comparison: React vs Angular vs Vue

Reactant view at their core is focused on building user interfaces, while angular is focused on building applications because of this angular is bigger more complex it has a steeper learning curve. While they’re initially smaller and less complex the more that you extend reactant view the more than their size and complexity will grow.

All three frameworks provide Co-lies or command-line interfaces, these C lies makes it easy to create new projects, support local development and prepare your apps for deployment. All three frameworks also have great support within code editors, like Visual Studio code and atom, to get the best experience you’ll need to install the appropriate editor extensions while performance benchmarks vary for some use cases, each of these frameworks offers similar performance given that for most developers or teams performance isn’t a significant differentiating factor.

Trying to choose which of these front-end frameworks is the best.? It is a little like trying to decide which ice-cream flavor is the best, it’s a subjective decision that will vary from each person and situation and your favorite will likely change over time, remember picking the right front-end framework is important but it’s far more important to focus on learning these shared concepts, this will prepare you for whatever happens to come next and make no mistake, front-end web development like all programming specialties will continue to change and evolve over time!


React vs angular2

React vs Angular2: You should know the difference

React vs Angular2: In my previous article, we had a discussion on react vs angular right? Now we will discuss React vs Angular2. It is very important to know that, the right choice of technology always matter.  Having the experience to work with a variety of technologists, I am very much excited to help you on how to decide between angular2 and react.Js frameworks. Angularjs is an open source JavaScript framework providing everything needed to create a client-side or website.

Angular is a Google creation that was designed with simplicity in mind

React vs angular2

It is worth noting that its second version, unlike the first one, has got rid of all unnecessary complexity. The team of angular 2 developers has added native apps support, server-side rendering, and much more. We also cannot omit the fact that angular 2 performance increase dramatically.

First of all, angular is a Google creation that was designed with simplicity in mind. It means that angular will not injure coders’ psyche while learning. Besides, many coders’ point out that if your angular code looks complicated  – you are doing something wrong. The popular websites built on angular we can refer: GoodFilms, Freelancer, Upwork, etc. ReactJS is a JavaScript-based open source library with the JSX compiler. This library is mainly focused on the user interface allowing to create reusable UI view components. From the technological point of view, react-based solutions are feeling friendly. Their performance effects ability is high, so popular websites built on react.js we can refer, to Netflix, Sidley, Walmart etc.

Technologies Comparison – React vs Angular2

Now, let’s dive deeper into details that are quite important during technology selection. One should be acknowledged with the kind of license that framework is disturbed under. Several licenses are much flexible to work with and one can use them to create commercial apps without any problem. However, there is a variety of license that doesn’t give you such a freedom of action.

Angular and react are both open source with no restrictions towards the usage, angular uses MIT license against three closed BSD used in react. However, the only visible difference of BSD is a ban on usage of a right holders name for advertising purposes.

Model, View, and Controller

react vs angular2

The model-view-controller pattern allows splitting the project data into three components: Model, View, and controller. This way, the magnification of each component can be conducted independently leading to tighter code and increasing the quality of the final product. Among all the angular features, the availability of MVC patterns out of the box is a significant advantage to reactJs.

Talking about angular, worth to mention its ease of display templates writing. Having really straightforward UI for your data, angular allows you to get the end result with a more intuitive approach to the user interface that demands less code and seems to be more obvious.

Document Object Model(DOM)

In that case with reactJs, it needs some special functions in order to manage data display. Mostly it means that you should define the way your data is represented before it will be coded into the DOM. That might cause a disconnect during its attempts to determine how a particular element will be rendered. Angular uses two-way data-binding, with its help, the framework is able to connect DOM model data via the controller.

In a nutshell, when a user interacts with inputs and provides new value to your app not only view can be updated but also the model too. Therefore, you do not need to write any method for tracking these changes within the application.

However, this approach affects performance since a watcher for each binding is created. React uses one-way data-binding, where the flow data is directed only in one way. Due to this, you will only be aware of a place where your data changes. This approach is much easier to debug when it comes to large application.

Angular creates a watcher for every binding in order to track all the changes in the DOM. As soon as the view gets some updates, Angular start comparing obtain values with the initial ones. So that, Angular 2 performance may cause some problem when it comes to massive apps.

ReactJS experts have introduced the virtual DOM idea that allows creating light DOM tree saving it on the server. Every time a user interacts with the website, for example, filling the form, react creates a new virtual DOM for comparing it with a previous one. After the library has found all the differences, between these two models – the virtual DOM model will be revealed. This way reacts performance increases when it comes to big amounts of data since there are no watchers.

If you can’t choose how to continue further with web development or mobile app development for your business, you can outsource our skillful JavaScript experts who not only develop your application but also assist you right from your project requirement identification, planning, development, and deployment.


Angular vs React

Angular vs React explained in detail..!!

Angular.Js vs React.Js

The benefits of developing with JavaScript frameworks, like angular or react. Angular vs React: the next question that usually comes is what is the best one to use what and should we use for the business or which is the most recommended one in general and unfortunately, it’s not an easy answer because a lot of these frameworks are a very similar concept that makes scalable web application possible.

Imagine, we go to a car dealership we ask the salesman what’s your best car, well that’s going to depend on what we need, something the great gas mileage or a perfect towing capacity, all the cars in the lot will technically help to take us to travel from A to B but they’ll do it in multiple ways and we might like one versus the other based on those specifications. So, it’s very similar with JavaScript frameworks a lot of them are based around componentize development making scalable large applications easier but they’re going to do it in different ways and some developers really like angular & some really like react but again both are great solutions to make large web or mobile applications. Ultimately, we encourage the readers to do a test drive some of these tools and figure out the best solution for yourself.

Differences between Angular & React.

Now, the differences between Angular and React. Angular as marketed a complete framework for either web or mobile it takes over the assembly line with everything we needed to develop – large-scale applications out of the box and it’s built on typescript, a superset of JavaScript which can be great or terrible depending on who you ask typescript is a language that actually compiles down into standard JavaScript. It necessarily gives us the features of the future to use at present as well as optimizing our code for the browser because once new JavaScript standards are defined browsers still have to implement those specifications or make them available to use typescript.

Let us use these features and then worry about spitting out code, that the browser will understand, it’s a strongly typed language that allows developers to specify datatypes and strict contracts between various pieces of code. Those who come from a Java or C sharp background might really like typescript as it shares a lot of common features. Now, there’s a ton of great things in typescript that we can’t possibly cover in one blog, so we’ll be diving deeper into these as we continue to pin down more blogs, but one of the greatest benefits about typescript and having that compilation process, that is, we can catch a lot of Arizona code before even running our app, if you’ve ever worked with JavaScript you can understand the pain and easily misspelling a word that crashes your entire program and you can wait several minutes hunting for a bug that was all because of a silly mistake. Let’s be clear, typescript can be used with a variety of tools.!

What makes interesting about angular.Js?

Angular vs React

What makes interesting about angular is, they really treat it like an A-class citizen and you’ll understand all the documentation defaults around typescript.

If you’re using react.js and you want to use typescript you might find it a little difficult to find documentation or others doing the same thing. Need Developers? Hire Top ReactJs developers

Main differences between the ionic and native script

Angular vs React

To develop your mobile applications in angular there’s a couple ways we can do, we can use the ionic framework which is a truly hybrid approach making cross-platform apps that uses the web browser within a native app container or we can choose to use native script which is a truly native application with native UI accomplishing 60 frames per second.

These are the two main differences between the ionic and native script and there’s definitely pros and cons to both approaches because this is an introductory blog and I will again save that for later stages. One of the major differences between angular and react is that Angular is indeed a full-fledged toolkit to create your applications out of the box, angular has solutions for routing accessing data services, templating and more. I think the biggest advantage with angular is that everything is right there for you to use and this is going to provide a lot of consistency.

Reasons to don’t like Angular.Js

Angular vs React

Now, one of the biggest cons developers probably don’t like about angular is that it is indeed a box you are operating including the new libraries. There’s absolutely an angular way. Now, the question is can you use angular without typescript? Sure! You can, but it’s actually not used widely and so if you really don’t like typescript you might be best just choosing a different framework maybe something like react and the question that all of the managers and CTOs want to know, who’s using angular today?

Well, the big names like NBA Sears, the NFL grub hub, for just a few and for a more list of companies using angular. A full listing of more showcases, react on the other hand takes a different approach to all this because react is just a piece of the puzzle of selling point and its use as a virtual Dom in the emphases on application state, now you’re probably asking yourself what’s a virtual DOM and to understand that I have to write about the regular Dom, the document object model or Dom is the view representation of all your code it takes our HTML and JavaScript to create what we see on the real page. Dom was never built for the dynamic web apps.

The previous websites were static content and general text living on a page, nowadays we are really pushing the dominoes since it was not designed to do so. Searching for Best ReactJs Development Services

How React.Js resolves issues can’t be done by Angular

React went about resolving this performance problem by removing itself away from the environment. With react you work with an object representation of the Dom & react maintains two snapshots, an original and one of the updated changes. That compares the two, to find the difference updating that small piece of code that actually needs to be changed rather than rewriting the entire HTML document.

What ends up happening is an extraordinary performance boost as we’re not forcing the whole browser to repaint itself, every time there’s a change again there’s a lot more that goes into this process. One of my preferred things about react is the focus, it has on application state it’s an object, that controls how the code or component renders and behaves.

One can think of state as a single source of truth for all the react.js components rather than keeping values and variables that are littered throughout the component or application, they’re continued in a single object that can only be restructured through a special method of set state & it’s similar to a private class with properties that get updated with a public method. At current, you still use variables in react but State is an object used for something that’s dynamic like the data that might change or maybe boolean values which they like to show or hide a loading spinner this makes it very easy to debug a react application.

React.js features Virtual DOM | State

One can always find an exact State to try to reproduce some bug or some feature. Since react focuses on these two features of the virtual DOM and state alone, its needed to fill those missing pieces like routing and templating. Fortunately, there are a lot of react.Js libraries out there to back this like the rack router and JSX JSX is not technically templating, but it serves and resembles alike properties and functionality tools like they produce rack tap and make this really easy to create a rack tap that already has all these pieces assembled for you in react.

We don’t really get a lot of that boxed with angular because it only governs the view layer with the state object and it doesn’t really care if you want to include additional library, one can easily snag a package off of NPM import an entry application and that goes downside with a lot of react apps, that can vary in their composition with multiple tools to accomplish similar tasks that might find to react.Js applications that look very dissimilar from one another.

When you are going to use React.Js know these tools and style opinions

Angular vs React

So if you’re going to use react it’s going to be really important for you and your team to get together and agree upon certain tools and style opinions within your business and just as a reminder we can accomplish numerous things that we get, an angular with type checking and additionally there are so many different react packages that again is very important to agree upon what we’re going to use and be on the same page within the business need and in reactJs.

We can also make mobile apps just like angular so if we wanted to make mobile apps with react.Js we would use a react native, we could technically use a native script but react native is really leading the charge and making native UIs for mobile devices. React native comes from the same people at, Facebook that gives us react and has a great ecosystem of third-party components if we wanted to take a more hyper approach with web views inside a native container we could use PhoneGap from Apache. In fact, this is what ionic builds off of and as far as who’s using react there’s actually quite a few companies you might recognize such as, Twitter, Airbnb or uber or Pinterest they’re all using racks somewhere in their product.

Airbnb: One of the Biggest react.js company

Angular vs React

Airbnb is one of the biggest react companies I’ve seen including react native. Now, if you’re using angular or you’re planning to use angular don’t let this discourage you because a cool name is not on your list. Remember, angular entirely rewrote itself from version one to version two, to be a huge scalable framework and it wasn’t really intended to do that with angular one but they pushed as far as they could take it and then they went back to the drawing board on angular 2.

Whereas, a rack has had much more of a steady evolution, since, it’s only focusing on the view layer in this state object. The other companies started off with, PHP or Ruby on Rails and they’ve been sprinkling react into their applications, so that might be a big-time reason why a lot of them chose react over angular, they weren’t rebuilding it from a start and eating a whole framework like that, I personally think one of the foulest things one could do is to pick one of these frameworks, because Company A or B is using it. Yet again, look at these frameworks, evaluate it for your own self and then make the final decision.

If you can’t choose how to continue further with web development or mobile app development for your business, you can outsource our skillful JavaScript experts who not only develop your application but also assist you right from your project requirement identification, planning, development, and deployment.

 


What is react js? React java scipt

React Js – Open source JavaScript library

React Js is an open source JavaScript library for building user interfaces created by Facebook. They say it right up front here and to me, this is the best description of it now, people like to maybe claim it’s a Framework but at the end of the day you just really need to think about this.

What is React Js?

What is React Js

You’re building a website and you need something to be interactive or potentially a dynamic interface right and it doesn’t necessarily have to be crazy interactive. It could just be a general interface, I mean they make static site generators out of react Js now.

So, either way, the whole point of react Js is just for building interfaces whether that’s interfaces that you click on something and something else changes and data loads. But at the end of the day, you’re just building interfaces and you can drop in if you want it to the right you could have a module of your site that is reactJs.

And they may be reactJs is just rendering a very small portion of your website it could be an entire HTML website and using react Js. You could drop in an interface maybe if this interface needs to be dynamic or something like that. So usually I think the misconceptions about react are that it does more than you think it.

People might think that it’s a whole framework it has all this sort of stuff in it. In reality, react is just code that makes it dead simple to interact with elements and build dynamic components and buy components.

I just mean areas or things in your website right a good way to think about it would be to even just look on this page overall like what could be a component here. Well this search area up top here search docks, this could be a component.

So if you think about it, this particular user interface requires that when you click on it and you start typing that a list of search terms just start coming up and then allows you to select one and then go on to something else but this thing’s a sort of doesn’t happen with basic HTML right and you couldn’t necessarily do all of this in the same way server-side or something

like that this requires that when the user in the browser starts typing something some dynamic stuff happens and some interfaces change or load or something like that and so that’s really the purpose of react right it’s to build cool stuff like this stuff that is dynamic now.

JSX and HTML

What is React Js

Let’s talk a little bit about what react looks like and if we kind of scroll down here we can see some examples and you may confuse code that looks like this with well react itself and that’s a major turnoff for some people is the use of HTML in JavaScript and the hits it’s not necessarily HTML it’s a language called JSX which by the way is optional you don’t even have to use jazz if we

were to uncheck this checkbox you could see that this is what react looks like without JSX now honestly it’s recommended to use JSX . I personally do it’s a nice way to work in it but it

shouldn’t turn you off because honestly one of the benefits of using JSX is that you’re able to interact with the Dom in the way that you know how right the way that’s very familiar you’ve been writing HTML for all of these years. We can write HTML in a way that’s 100% connected to JavaScript and it’s really connected in a nice way that you can interact in them and have encapsulation and all sorts of really great stuff that you can’t have with HTML not only that but it provides some sort of structure where a component sort of encapsulates everything that a component would do instead of writing a bunch of jQuery right because when you’re writing a jQuery you have your code that’s interacting with the HTML but at the

end of the day those two things are entirely separate and they’re interacting with each other here this whole thing is encapsulated in one little thing  and just makes working with it just one-to-one SuperDuper easy in addition components also have something called state where well you can change their state.

 

About State in ReactJS

What is React Js

What is a state in Reactjs? You can think of it as a toggle. Toggle has two states on or off right and with reactjs, you can set that into the component this on or off value and you can trigger it, change it, whatever and then do something with that value further. It’s nothing groundbreaking in that regard but the fact that this state lives within this component and again a nice way to encapsulate everything. Now lastly we have some really cool stuff the fact that you’re building components.

 

Explaining State with Analogy

I like to describe these I don’t know if this is a great metaphor analogy you know but as Lego blocks right you have these blocks that you’re creating with your components. You can connect them together to make things. The reason why this doesn’t hold up entirely is

because react has this parent-child relationship obviously that Lego blocks don’t but what’s cool about this is that you can grab these different components from elsewhere from NPM someone else has written. You can use it in your project. They can be these macro things that generate full-on tables and charts.

It can be very micro like a simple toggle component that simply just makes it so you don’t have to write those state changes all the time. This kind of things that allow react to be so flexible. It’s one of the reasons why it’s really had just an absolutely blown up in the community now another great feature of react itself is that you can use react code on the client or server or both.

If we were to look at the code where you could see everything server-side rendered as well right this code is coming straight out of the HTML that’s loaded in this page but here’s the kicker. I wrote the same code client-side and server-side that means I didn’t have to write let’s say if you’re talking about WordPress. I didn’t have to write a WordPress theme and then write a WordPress theme in PHP. Then write some JavaScript to interact with it in the Dom those are all together in one so these are just some of the things about reacting reasons why people like it for the most part. It’s a fairly small library for working with user interfaces and it’s extremely capable one of the cool things that reactjs did.

 

When it came out as well instead of trying to do everything. It tried to do just one thing really well and because of that, the community is extremely flexible. If you want to use other things in coordination with reactjs it’s extremely easy reactjs is not trying to do everything it’s not trying to. It’s just basically handling your user interface and how it’s displayed and updated on the screen so I’ve gone this far without talking about the virtual DOM which is one of the features that one of the things that people really really like about how react performs and essentially what the

What is virtual Dom (Document Object Model)

It’s if you well the Dom which is the document object model is essentially what the browser sees as HTML as a structure of your website and it’s how you interact with your website in the browser.

What react does is it basically creates an in-memory data structure cache so it’s caching what it looks. Then it’s computing differences and then it’s only changing what needs to be changed right now one thing that’s great about that is you get some really really fast page updates.

React js virtual dom

When you change things and move things around the only thing that needs to be changed is changed and everything else stays put and therefore react can be extremely fast again I mentioned this parent-child relationship as well basically where data comes down from one component into the next and it greatly mimics how you generally think of HTML structure overall.

ReactJs virtual Dom

If you look at some of my code right here you can see we have something like a toggle that wraps around a user menu wrapper that wraps around a user menu icon that wraps around a Gravatar now what’s interesting about this whole flow is that data can come down where I have the user passed into this component.

I can then use this same user and a child component whether it’s in the same file or not pass through something called props now if you want to learn about all this stuff again check out the react course but for the most part you always have this sort of top-down data structure where stuff’s going in from parent to child It makes knowing what’s going we’re extremely easy now another thing that came about with react is react native allowing you to write it basically reacts code you can write essentially code that looks just like this the only difference is you’re using custom components built by

Facebook that interacts with native API’s to build really like native applications not as a wrapper around an HTML site put into an app. But a real application and that is something that’s extremely powerful. Really you couldn’t do before right you locations with JavaScript you just couldn’t so again all of this stuff you hear the words JSX.

You hear virtual Dom you hear state you hear things like Redux which actually isn’t part of react itself you hear all of these things and think gosh react seems complex. I don’t want to write HTML inside of JavaScript but at the end of the day like I mentioned that react is simply just a way to write user interfaces you can use it as much or as little as you want. You don’t need to build your entire app and react however as I said before because react can be server-side rendered building your entire site. Reactjs is not a terrible idea, in fact, I think it, in fact, there’s a reason why it’s really absolutely

blown up. Another great thing about reactjs is that it teaches you some actual legit JavaScript skills that you don’t get from other frameworks. One thing I really like about reactjs is that things

are just based on JavaScript, for instance, we have a component which is essentially just a class right instead of being something far out of JavaScript world. We’re defining a new class and all

it’s doing is an extending an existing class in that class comes from reactjs that’s what gives us components some of its powers right. Even though there is some jargony stuff here we still have a constructor we have we have methods in here. We’re using just straight-up

JavaScript for instance.

It doesn’t try to do looping or anything like that for you. There’s no ng for loops and stuff built-in to react you actually use legit array functions from JavaScript and you see things like a map that filter and reduce being used and those things can be scary for javascript developers or even web developers. All right if you haven’t

used that stuff it looks scary error functions all the stuff looks scary but the great thing is that

these are skills that you take with you outside of react they do not react specific skills this is straight-up JavaScript skills so another reason I really love working in react now let’s talk about something else you can take with you.

You can take your JSX and react code with you as well there’s a lot of other libraries that interface with Reax API, for instance, we have pre-act which is a three kilobyte alternative to react with the same as with the same es2015 API so what’s cool about pre-act is that this library aims to be able to be not

necessarily a drop-in replacement but a replacement for react nonetheless that’s not going to make you feel locked into a facebook project but more or less luck but more or less feel right at home building your components and another one is inferno which is a super-fast library

Jordan Wolk an engineer on Facebook was influenced by angular and some other stuff

What is React Js

Although I don’t know what the current speed comparisons to the latest version of react as they do say it’s five times faster than reactjs. But honestly, I’m not sure if this has to do with the latest version of react witches a notable improvement on performance. Some quick things about the history of our reactjs just so you know a little bit here it was created by Jordan Wolk an engineer on facebook. He was influenced by angular and some other stuff and created react where it was first used in Facebook’s feed in 2011 and so it had been around for a little bit before it was open sourced in 2013 and when it was open sourced in 2013. When it started to catch on then in a 2015 react native came out and that sort of blew the doors off again sort of blowing people’s minds that the ability to create native apps in JavaScript and most recently in 2017 react released.

 

Their latest version 16 which is also known as react fiber basically it’s an entirely new core algorithm that makes his thing run super fast. Going to be the foundation for a whole bunch of future improvements and things that fix some of the things that fix some of the issues that we’ll have with maybe some of the way.

We write react components so that’s pretty much it if there’s one thing you can take away from this is that react is not this big scary beast it’s not this giant foreign alien it’s not something that’s going to destroy the way you write HTML or understand websites but it will completely blow your mind in terms of how easy it is to build excellent user interfaces.

One of the reasons why it’s so popular although it is polarizing when people see things like HTML and JavaScript. As well as the general look of react Akande it can definitely put some people off but for those people, because I was certainly one of them you know I was initially put off, by the way, react looked. Felt I would recommend that you plow through that and learn it because honestly, nothing has made me a better developer than learning react and I feel like I can say that confidently so check it out react org if you want to learn more about reactjs.