The introduction of React JS has opened the doors for front-end developers, which helps create user-friendly interfaces. Late back in 2011, the developers of Facebook started facing some issues related to code maintenance.

Table of contents:

• Introduction
• What is React JS?
• Technical requirements of React JS
• Non-technical requirements of React JS
• Core principles of React JS
• Conclusion

Introduction

As the Facebook application started to rise in its features, members needed many people to keep it running smoothly. The increase in the number of team members and application features decreased their growth as a company. Over time Facebook became challenging to handle as they faced an increase in drop of updates.

After some point in time, developers couldn’t keep up with a drop in their updates, and they had to make an immediate upgrade to become more efficient in the market. So, Jordan Walke built a prototype that made the process efficient, which gave birth to React JS.  

What is React JS?

It is an open-source JavaScript framework and library developed by Meta (formerly known as Facebook). It’s used for building user-friendly interfaces and web applications faster and more efficiently without coding much. Here you can develop applications with the help of reusable components, which can be made as independent Lego blocks. These components are small pieces of a final interface that can be assembled to form the application’s user interface.

Candidates who want to advance their career, React JS Training and Certification Course is the best option.

There are many such roles and responsibilities that a React JS Developer needs to perform to get the best results. There are two requirements for it, Technical Requirements and Non-Technical Requirements.

Technical Requirements

• A React JS Developer should know all the data structure libraries and code versioning tools.
• They should be able to leverage inbuilt react toolkits for developing robust front-end features.
• React JS Developers should be able to create libraries, data visualization tools, and reusable code.
• They are responsible for handling data structures.
• They should know the way of DOM manipulation.

Non-Technical Requirements

• Every developer must have constant interaction with their team members.
• They are responsible for following some standard approaches and documentation to make necessary changes in the application.
• They must also be able to thoroughly review the web application’s requirements and their interfacing elements.
• Now let’s move on to the main topic, which is the Core Principles of React JS. So, there are various Core Principles of React JS, which are as follows.

Core principles of React JS

1. Composition

One of the essential features of React JS is Composition. Components are defined as “Just Functions,” but they should be more than that to be helpful. React includes some components such as rendering, lifecycle, and state. You can add functionality to a component without the need to cause changes in the codebase.

For example, there is no harm in using state or lifecycle methods in components, and like any other feature, it must be used in moderation. Still, we have no intention to remove them, but it is an integral part of reacting, which makes it worthwhile.

2. Common Abstraction

In general, we don’t add features that can be executed in userland. We don’t want to bloat apps with useless library code. If we notice that many components implement a particular feature in incompatible or inefficient ways, we might prefer to take it into react. We don’t do it lightly; when we do it, it’s because we are confident that raising the abstraction level benefits the whole ecosystem.

3. Escape Hatches

React is driven by the needs of the products and is influenced by some paradigms that still need to be fully mainstream such as functional programming. Staying within reach of a wide range of developers with different skills and experience levels is a fundamental goal of the project.

If some pattern that is useful for building applications is hard to express in a declarative way, we will provide an imperative API for it. Suppose we can’t figure out a perfect API for something that we found necessary in many applications. In that case, we will provide a temporary subpar working API as long as it is possible to get rid of it later. It leaves the chance for future upgrades.

4. Stability  

We think Stability in the sense of “nothing changes” is overrated and quickly becomes stagnation. Instead, we would like Stability because “It is heavily used in the production, and when something changes, there is a clear migration path.”

When we criticize a pattern, we study its internal usage on Facebook and add deprecation warnings. They let us assess the impact of the change, and sometimes we back out if we see that it is too early and we need to think more strategically for the codebases in an editable mode.

5. Interoperability

We place high values on Interoperability with existing systems and gradual adoptions. Facebook has a massive non-react codebase. Its website uses a mix of a server-side component system called XHP and internal UI libraries that came before React. It’s important to us that a product team can start using it for a minor feature rather than rewrite their code.

This is why react provides Escape Hatches to work with mutable models and tries to work well with other UI libraries. It can wrap an existing imperative UI into a declarative component and vice versa.

6. Scheduling

Even when your components are defined as functions, when you use React, you don’t call them immediately. Every component returns a description of what needs to be rendered, and that description may include both user-written and platform-specific components. It is up to React to “unroll” at some specific time in the future and apply some changes to the UI tree according to the render results of the components. Since you don’t call that component function but let React call it, it can delay calling it if necessary.

7. Debugging

The ability to trace any UI to the data produced in the form of current props and state is critical to React. It is an explicit design goal that the state is not “trapped” in closures and combinators and is available to React directly.

When the UI is dynamic, we believe that synchronous render functions of props and state turn Debugging from guesswork into a dull but finite procedure. We try to preserve this constraint in React, even though it makes some use cases like complex animations challenging.

8. Configuration

Global runtime Configuration options are likely to be problematic. Global Configuration doesn’t work well with composition since composition is central to React, and we don’t provide it in code, but we do provide global Configuration on the building level.

For example, We provide separate development and production builds, and we may also add a profiling build in the future, and we are open to considering other build flags.

9. Beyond The DOM

We have seen the value of React in the way it allows us to write components with fewer bugs and compose them together well. DOM is the original delivering target for React but React Native is crucial both for Facebook and the community.

Being renderer-agnostic is a crucial design constraint for React and adds to some overhead in the internal representations. On the other hand, any improvements in the core translate across platforms.

10. Implementation

We provide elegant APIs where possible, and we are less concerned with the Implementation being elegant. The real world is far from perfect, and to a reasonable extent, we prefer to put the ugly code into the library if it means the user doesn’t have to write it. When we try to assign a new code, we look for an Implementation that is correct, performant, and affords a good developer experience. Elegance is secondary.

11. Optimized For Tooling

Optimizing for search is also essential because we rely on code mods to make breaking changes. We want it easy and safe to apply profound automated changes across the codebase and unique verbose names, which help us achieve this. Similarly, some distinctive names make writing custom lint rules about using React easy without being troubled about potential false positives. JSX plays a similar role while it is not required with React, and we use it extensively at Facebook for aesthetic and pragmatic reasons.

12. Dogfooding

Dogfooding defines that our vision stays sharp, and we aim to have a focused direction toward our goal. We actively listen to the pain points and address them to the best of our ability. The community makes React essential to us, and we are honored to contribute it back.

After listening to many open-source projects, we have learned that when we try to make everyone happy in the same amount of time, it produces projects with a poor focus that grow poorly. Instead, we found that choosing a small audience and focusing on making them happy brings a positive net effect.

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Conclusion

To conclude, learning ReactJS is the need of the hour. It makes sense as it provides much-needed ease to developers in building highly engaging web applications and user interfaces in significantly lesser time, where they create large-scale apps with frequently changing data. ReactJS benefits of being robust, advanced, responsive, non-risky, and user-friendly far exceed its disadvantages. Developers and organizations understand ReactJS’s relevance in the market, so they promote its learning and development 

wholeheartedly. ReactJS development has emerged as the future of web creation with its extra versatility and ease. It saves your time and money on development because it’s component-based. You can break down an interface into recyclable components that allows you to build robust user interfaces.

Author Bio

Archit Gupta is a Digital Marketer, and a passionate writer, who is working with MindMajix, a top global online training provider. He also holds in-depth knowledge of IT and demanding technologies such as Business Intelligence, Salesforce, Cybersecurity, Software Testing, QA, Data Analytics, Project Management and ERP tools, etc.