Getting Started with React A Beginner's Guide

Getting Started with React A Beginner's Guide

Many companies choose React because of the stability, supportive community and a large talent pool as well as the freedom and flexibility it provides. Our Lelo website is the best ReactJS development company in India.

What is the React?

React is a JavaScript library for build UI components. Unlike more complete frameworks like Angular or Vue, React only deals with the visual layer, so you’ll need additional libraries to handle things like routing, state management and so on. In this guide, we will focus on what React can do out of the box. And Our Lelo website is the best company for React Js based development.

React applications are built using reusable UI components that can interact with each other. A React component can be a class-based component or a so-called function component. Class-based components are defined using ES6 classes, while function components are basic JavaScript functions. They are defined using the arrow function, but they can also use the function keyword. Class-based components will implement a function render, which returns some JSX (React's extension of regular JavaScript, used to create React elements), while function components will return JSX directly. If you've never heard of JSX, don't worry, because we'll take a closer look at it later.

How does React work?

To code with React JS development services use a special feature called JavaScript and JSX. React apps are built with reusable components. The code is declarative.

Declarative code

With the help of declarative code, developers tell JavaScript what needs to be done. What, not how. Declarative code is a result-focused instruction, which states what we want (end result) rather than how we want it.

In the case of React, the library is in charge of taking all steps necessary to achieve results. Sometimes it can be challenging because the team has to know how to define the results but in the end declarative code is easier to read and manage in the long run.

React Facility


It is a language extension that allows web developers to easily modify the DOM using HTML code. Developers write code using HTML-like syntax that is translated into pure JavaScript. Using JSX to update the DOM has significant performance improvements.

Virtual DOM

Traditionally, a website uses HTML pages received from the server to update the view. For websites that involve high user interaction, this can seriously degrade performance, as the entire DOM would need to be reloaded whenever a user clicks on the feature that calls for a page refresh.

Single page apps written in React do not need to fetch external HTML pages from the server. JSX allows developers to create a virtual DOM, which is a copy of the actual DOM React, which is used to see which parts need to change when an event occurs. The virtual DOM determines what changes need to be made and updates the particular section intelligently. It will take less computing power and loading time.


To write React apps, developers create components that correspond to different interface elements. Each component represents a small, reusable piece of HTML, it has its own logic and control. It can maintain an internal position. Components make unit testing easier.

Organization of components

To define the structure of an application, components are logically arranged in a tree-like structure, where higher-level components contain lower-level components. Components can be nested within other components allowing complex applications to be formulated with simple building blocks.

one-way data binding

React uses one way data binding; it only binds the value of the model to the view, not the other way around. Information flows in only one direction. Developers modify the state of the component, and the updates are propagated to the components that are nested inside them. Data can only be transferred from one component to the view, not the other way around.

The two-way data binding

The two-way data binding used in frameworks like Angular means that when the data in the model changes (the model is updated), so does the UI, and when the UI elements are updated, that change is propagated back into the model. Sometimes it can have side effects.

Flexibility versus learning stage

React is pretty easy to learn, especially for developers who know JavaScript. However, if your team does not have solid frontend experience, it may be difficult for them to learn React. Why?

The React architecture offers much more flexibility in terms of patterns, additional tooling, and third-party libraries.

On the one hand, this flexibility is a big advantage for frontend specialists. Libraries without opinions allow a team to accommodate every single aspect of product requirements. React gives them a lot of options, they are easy and pleasant to work with. With our company you can get a custom software development company in india.

On the other hand, it is easy to mess up with the architecture when inexperienced developers start to code in React. In addition, in the case of larger teams, you have to keep your finger on the pulse in terms of integration: using similar tools and patterns.

Support and stability

React.js is supported by the biggest players. It makes React a stable solution. We can be sure the library will continue to be supported for years to come. Even if React itself completely stops expanding in a few years, it will be supported for the next 20 years. This makes it a stable solution for apps that are planning to expand and stay in the market for a long time.

Community and talent availability

React's community is huge, so hiring experts is easy. According to The State of JavaScript , the React experience steadily grows over time. Over 70% of developers surveyed have experience with React and have declared that they will use it consistently.

Frontend with JavaScript: Angular Js vs React Js vs Vue Js

Angular, React and View are the most popular and widely used JavaScript frameworks/libraries. They are very similar, yet each of them fits into a different team's capabilities.

Since Angular is highly capricious, frontend experts may have a hard time following its rules. Both React and View are flexible, they are hard to deal with for people who only start with frontend development. Vue is fairly new and it positions itself in the market but the position of the community around React and the library is big.


Out of these three, Angular is the most important framework. It provides a complete platform with a complete package of tools. Some consider it a benefit, others not, because it eliminates flexibility. The learning process for frontend experts is hard and the concepts seem complicated. It is highly considerate, so it would be the better choice for fragmented teams and backend developers. Angular is backed by Google, but they also focus on other technologies.


React is loved by the community, it offers a lot more support from contributors, and provides useful, publicly available solutions. It doesn't offer as much as Angular, but it does its job perfectly. It has the support of the biggest players which makes it reliable for long term projects. React is an ideal choice for large scale apps because it offers modularity, however, developers have to know how to handle it.


Vue doesn't have the backing of a big company and it's the youngest one here. However, it can be too flexible for some teams and difficult for non-experienced people to use. It has the lowest learning stage for frontend experts and highest for backend experts. Vue has the smallest community and it lacks some plugins, but it is steadily growing, is the lightest and offers excellent performance.


Many companies choose React because of the stability, supportive community and a large talent pool as well as the freedom and flexibility it provides. Our Lelo website is the best ReactJS development company in India. The entire ecosystem provides many useful tools and gives us the freedom to choose the technology stack for our application. Meanwhile, React is wonderful at doing its job while taking care of the UI of our application.

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