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ReactJS has grown to become one of the most popular front-end frameworks in the world, with companies like Facebook and Instagram using it to build their user interfaces. However, even with so many resources available on ReactJS, people are still confused about how to become experts with this framework. Here are five simple steps that will help you become an expert ReactJS developer, no matter your experience level or programming language background.
What is ReactJS?
ReactJS is a JavaScript library created by Facebook for building user interfaces. It allows developers to create reusable components that are easy to test and understand. It was developed out of React Native, a framework used for creating mobile applications that run on iOS and Android, showing how much promise it holds for front-end development.
It has grown rapidly since its release, but many developers haven’t tried it yet because they don’t know where to start—or if they should try it at all. The purpose of this guide is to help you jump into react js course so you can figure out what makes it so great.
Why Should I Learn React?
React’s syntax is clean and simple, which can be refreshing for developers who have struggled with other JavaScript frameworks. With React Js course, you don’t need to worry about wiring together multiple APIs or packages. It can be intimidating at first, but once you wrap your head around React’s core concepts, it will seem natural and easy to work with.
If you are just starting with web development, I highly recommend learning from React Js course because it has a small scope, and getting started takes less time than it does with other front-end tools.
Getting Started with React
Before getting started with React Js course, you’ll want to be familiar with a few other tools and languages like JavaScript, HTML, and CSS. At its core, React is a library for managing complex data updates and rendering them to the user interface. React leverages a technology called virtual DOM which makes it significantly faster than using traditional methods of DOM manipulation.
With that said, if you have no experience working with virtual DOM libraries like React or Redux, we suggest taking a free course on LearnReactJs first. It will teach you all of these fundamentals in an effective way so that when you sit down to start your new learning journey with node js training, you can focus solely on how React works as opposed to how programming works overall.
Understanding JSX
Before you can learn from React Js course, you need to understand JSX. JSX is what enables us to write HTML-like code inside JavaScript. There are multiple syntaxes for writing JSX, but there’s a reason that we use HTML-like code and it goes back to React’s relationship with Facebook: React was created by developers at Facebook (which uses PHP) who were used to writing HTML and CSS on their front end.
To be able to reuse their existing skillsets, they created a new way of combining JavaScript and markup so that it would be easy for them—but that doesn’t mean it’ll be easy for you! If you’d like more info on why Facebook uses PHP, click here.
Structuring Apps with Flux Architecture
Now that you have a firm grasp of React, Redux, and Flux, it’s time to put them all together and structure your application. A lot of how you choose to do so will depend on what technologies you want to use (and more importantly—what works for your team). But regardless of what specific tools you use for state management, make sure that you implement Flux architecture.
There are several competing ways of structuring Flux applications; I don’t recommend choosing one until you get a sense of what works best with your team. A good place to start is with React 0.14’s new official flux library react-flux which was created by Facebook specifically for creating flux apps using React.
What are Keys in React?
A React component’s key determines which component will be rendered when it receives a given piece of data. A component may have multiple keys, but if so, there must be only one key among all of them that matches props passed in by a parent component for that component to render.
All other keys are ignored in favor of the first match found and receive no corresponding props. By specifying keys for each component, you can pass in arbitrary amounts of data and rest assured that only one instance of any given component will ever get rendered. This is useful when you want to display a list of items where every item has its unique element or visual style.
What are the Two Ways to Handle Data in React?
You’ll want to know about the two ways to handle data in React: stateful and stateless components. Stateful components are easier to understand, but often are more complex.
Stateless components are extremely simple, but you need to keep a few things in mind when using them. Knowing how each of these works can save you time when building large apps with React and will help you better understand what you’re doing as well.
How do you Map Data in React JS?
Mapping data in React is a matter of knowing how to connect components, more specifically, knowing how props and states work together.
To map data, you first need to set up your project correctly. It’s best practice in React for each component not to rely on too many external factors; instead, you should keep all of your data-bound directly within your component if possible. That way, you can easily track what data is being passed into it without having to do any sort of filtering through other components.
What are Side Effects in React?
We’ve already mentioned that React embraces a functional programming style. As a result, it doesn’t support side effects natively (i.e., setting state and callbacks). Instead, it encourages you to think about your application purely: make it declarative and avoid state manipulation.
If you are accustomed to imperative or object-oriented languages such as C# or Java, then wrapping your head around functional programming concepts might take some time. But doing so is key in terms of mastering React and React Native development.
Conclusion
Once you have completed the comprehensive ReactJS Course, you will be fully capable of creating complex and data-centric web applications using NodeJS, ExpressJS, ReactJS, and MongoDB to store your data.
