What is React? 

You may not judge a book by its cover, but a web application gets assessed by the visual aesthetics of the User Interface (UI) and its functionalities. React is a JavaScript library that provides front-end developers an incredible framework and hence is getting increasingly popular. Aside from the encapsulated and reusable components, the customization features enable developers to build complex UI with simple views. Creating secure, responsive, and interactive web applications is no longer a challenging task but an exciting innovation with the sophisticated React.js framework.  

If you foresee a career or aspire to become a sought-after web app developer, you want to get well-versant with ReactJS.  

Which are the must-have skills you need to stack up? (Pun intended!)

Top 9 Must-Have React Developer Skills in 2022 

1. Hypertext Markup Language (HTML)+ Cascading Style Sheets (CSS)

Honing any skill always starts with getting the basics right. If you are a front-end developer, get familiar with HTML and CSS languages before moving into ReactJS. The more thorough you are, the firmer the foundation for constructing a well-developed page, website, and eventually an application. Well-scripted codes deliver a cleaner user experience.

Ensure you know how to: 

• Write the code for semantic HTML tags and use them 
• Use CSS for Inline styling  
• Build responsive CSS layouts with the box-sizing properties 
• Use Flexbox for creating beautiful and reusable components
• Implement CSS reset to avoid cross-browser differences 
• Apply the three main design principles—fluid grid system, flexible images, and media queries
  

2. JSX (JavaScript XML) + Babel
   

Simply put, JSX is the syntax extension of JavaScript that allows you to write HTML in React. JSX expressions simplify writing component codes and rendering tree-like structures of React elements. Essentially, JSX helps developers create simpler and elegant pieces of code even when they are large blocks. Developers familiar with HTML and CSS will appreciate the ease of building React applications with JSX.  

However, to implement JSX, you require the transcompiler—Babel that converts the ECMAScript2015 (ES6) + source code into a backward-compatible version of JavaScript. The toolchain helps you use modern JavaScript language features. 

3. JavaScript Fundamentals + ECMAScript 6 (ES6)

React is fundamentally JavaScript, and that is why knowing the programming language features and having substantial experience working with it is necessary for a front-end developer. The 6th version of the ECMAScript that standardized the JavaScript has certain modern features to take note of: 

• Arrow Functions 
• Variables (let, const, var) 
• Array Methods  
• Destructuring 
• Modules
• Ternary Operator 
• Spread Operator 

The new features will enable you to write asynchronous code making the process more efficient. 

4. Hooks

Hooks is a super-cool feature that makes a coder’s life far easier. Ask any experienced React developer, and they would tell you what a nightmare it was to refactor class components and render props with verbose code before Hooks got released in 2018. Hooks simplified the methods of updating the state and implementing the lifecycles of function components.  

Working with Hooks will help you improve the user interface with enhanced code readability, reusability, and testability.  

5. Virtual Document Object Model (VDOM) and Event Handling Facility

The biggest drawback of the actual DOM was that any manipulation of a single element in the tree structure would trigger the framework to rebuild every object. The more updates to the DOM, the slower the operations got, making it very cumbersome for developers. That problem got resolved only after the innovation of the Virtual DOM (VDOM). The React VDOM virtually handles all the changes made to the objects but updates only the necessary changes to those particular objects in the actual DOM when everything is finalized, thus saving you precious time.  

6. NodeJS + Node Package Manager (NPM)

Using NodeJS is NOT a prerequisite for ReactJS web app development but can definitely accelerate projects if utilized in combination. While ReactJS takes care of the front-end aesthetics of the web application, Node is a JavaScript language that is ideal for backend development. NodeJS helps maintain continuous streaming and server load balance for real-time data-intensive web applications. The full-stack JS framework improves scalability and speeds up code execution.  

Use the NPM cloud registry for managing all NodeJS package repositories or dependencies and the JavaScript libraries.  

7. Redux

One of the most important aspects of web applications is that they are expected to behave consistently across client, server, and native environments and must be easy to test, too.  You need Redux, the state management library for ReactJS to centralize and manage the global state of the application or to maintain specific patterns while updating the state.  

8. Technical Application Skills

Aside from having a command of the JavaScript language and system architecture, you must have knowledge and expertise of certain other tools crucial for writing clean code for the front-end development of ReactJS applications.  

• Build tools for component visualization 
• Modular bundle analyzer  
• Development automation tools 
• Tools for reporting crashes and managing testers, or beta version distribution tool. 
• Testing utilities or code evaluation tool to confirm if it complies with the JS 
• Form building API or libraries 
• Debugging extensions

9. Soft Skills

Even as you check every box for technical skills, your soft skills are equally important. You might want to cultivate these soft skills that employers or clients will value in a front-end developer: – 

• Creativity 
• Emotional intelligence 
• Clarity in communication  
• Learning/ Growth mindset 
• A keen eye for detail/observation  
• Critical/Analytical thinking 
• Time management, especially with deadlines 
• People management/ interpersonal skills 
• Accountability 
• Problem-solving attitude 
• Team player’s spirit 

 What Is the Future for React Developers? 

The post-Covid world has grown more digital than ever before. We rely on web/mobile applications for everything from buying groceries to improving physical and mental health. The growing majority of organizations are now showing a preference for ReactJS while creating a digital platform for their business since it provides a speedy, scalable, easy-to-maintain, and extremely SEO-friendly environment. Consequently, there is a noticeable upsurge in the demand for developers with a robust ReactJs skillset. And there’s no trough to this wave anytime soon!  

 Build on the 9 ReactJS skills, related technical skills, and 11 soft skills shared here. 

Create engaging web applications.  

And find yourself in the league of the most sought-after ReactJS developers of 2022.   

MetaSys React team makes the best use of all the new exciting features of React like React Hooks, React Bootstrap, React Redux and React Router to build complex web and mobile applications. So if you have any such requirement, then please feel free to contact our React Programmers.  

To illustrate the advantages of this approach, have a look at the UI structure shown below.

Let’s say the functionality required is that when a user interacts with the big component, the application has to update the small component and the header. In other words, we need to sync the header and small component as well as manage the states of all the other components. Without a state management library such as the one provided by Redux, coding this implementation can easily become very complicated.

Using the state functionality in React allows only the use of local, component level states.

You can store the states using setState method, and fetch the stored state using state.[STATE_NAME]. However, these states are local, and only available within the class component in which it is declared.

To store the states at the application level, i.e. the global level, in order to access them from different components, we can use React-Redux.

Let’s see how React-Redux works

You will see three main elements in the Redux architecture – Store, Dispatch Actions and Reducers.

Store: holds the states at the application level, and allows any component to get data from the store in the form of Redux States.

Dispatch Action: a function of the Redux Store to trigger a state change.

Reducers: It handles the value change in Redux State.

How to configure React Redux in a React JS project –

The following packages are needed to be installed to configure  Redux in the project –

1. Redux: the core package of React Redux.
2. React-redux: needed for React bindings.
3. Redux-thunk: a middleware which allows you to call action creators, and which returns a function instead of the action object.

These dependencies can be installed by using the following NPM command –
“npm install redux react-redux redux-thunk –save”

After these dependencies are installed, a store can be created and initialized with data/null values as per the requirements. This can be done by creating the file store.js in the project.

First however, you need to create reducer.js to handle the next states. Below is the example of reducer.js to initialize the state. Here, it is just returning the initial value from the reducer.

Below is a slightly more complex example of the code in reducer.js to update the states based on the action executed from the component.

In the above example, it adds the data to the state upon the dispatch action (ADD_DATA). Now let’s create the action to dispatch. You can create a file with the name action.js, that contains the code shown below.

Once the action is created, now you can create a store and then connect the store to the application. You can create a file with the name store.js, that contains the code shown below.

To connect the store to the application, you will have to use the entry point. In the index.js (i.e. entry point of the app), import the store as shown below –

These are all the Redux configurations for an application. Refer the the image below to use it in your component –

React Redux can handle large amounts of data at the application level with cleaner components and is particularly useful for big applications.

Without redux, to transfer data from component 1 to component 5, you need to pass it through middle components. This increases the props for components and creates more complexity and the components are less clean.

Using React-Redux, you can get or set the data to the store from any of the components directly by mapping the redux states to component props. In this case, you do not need to pass props to the middle components. This allows for much cleaner components and increased clarity in the code.

If you are looking to build a mobile or web application using React technology, then please feel free to contact us.