React JS – Best Practices And Anti-Patterns That Every Developer Must Follow

React is an easy-to-use, front-end technology, and a component-based framework introduced by Facebook, which is used to create highly interactive UIs. With 8 million users worldwide, developers use this framework and very basic technology to keep their code organized and to reuse design components and code, saving them a lot of time and effort. 

However, developers need to be aware of its best practices, insights, and anti-patterns while creating components. Developers can innovate powerful and creative applications using its flexible, open-source JavaScript library.ReactJS is extremely popular among developers, which the below-mentioned statistics can prove:

  • ReactJS is used by 3.4% of all the websites, whose JavaScript library is 2.8% of all websites. 
  • According to a survey, 40.14% of developers and respondents use React.js, 
  • It is downloaded 7900757 times a week. 

Best practices of using ReactJS

Tip 1 – Project Structure

Every React folder may differ in complexity, composition, and project specification. The basic thing to understand while using ReactJS is to define a scalable project structure using its basic response application structure. You can use the ‘create-react-app’ by deploying the npm command and then defining your project architecture. You must cater to the following:

Folder layout

All files related to several components should place together in a single folder with different identities based on JavaScript, CSS, Test units, Assets, etc. A component-centric file structure will help you focus on the reusable components of the response developer architecture, allowing design patterns to be shared across multiple internal projects.


SCSS files are large and need to be maintained professionally. You can use the CSS in JSS solutions, based on multiple libraries, which can help in maintaining large projects and in styling and theme setting them, which otherwise can become a tedious task.

High-Order component (HOC)

You can hire dedicated ReactJS developers who can further use the advanced technology in reactJS to enable the reuse of component logic in rendering methods. Components can be converted to higher-order components using advanced levels as well as amalgamating several components, adding their specific codes, to ensure compatibility, ease, and enriched UX when the user is logged in. HOC is available as soon as the user checks in, wherein all the merged components and their codes can be displayed under one roof.

Tip 2 – React Components

Here are some of the crucial React components that you should be aware of to make your work easier which are an integral part of your React Project.

Disassembling into smaller components

Try to split the large component into smaller components so that you can easily manage, test, reuse, and create innovative, creative, and smaller components.

Use functional or class components

If you need to display the UI without changing the logic or state, use the function component instead of the class component. In that case, the functional component is more efficient. You lose control of the rendering process while using functional components. This means that functional components will always be re-rendered if there are minor changes to the component.

Use functional components with hooks

After the release of React v16.08, you can use the new feature “React Hooks” to develop functional blocks using states. It reduces the complexity of the management country in-class components. You can prefer using functional components with reaction hooks such as end effect (), use state () that empowers you to use logic and facts without making major transformations in the regular cycle.

Rational Naming and Destructuring Props

To hold a readable and clean code, use a short name that makes sense to the component’s path to keep your code clean and readable. It also uses the function’s prop destruction feature. You can also eliminate the need to create props with each property name by destructuring the props which further helps in type checking and error prevention

Tip 3 – Code Style

Naming convention

You must name components in Pascal notation, such as “Select Button” or “Dashboard”. Pascal’s notation for components distinguishes them from standard JSX element tags. The methods/functions defined within the component must be camel case, such as `getApplicationData ()`. For constant fields that are used globally in your application, make sure to use only uppercase letters. Like const PI = “3.14”;

Anti-Patterns of ReactJS practices that should be avoided

Here are some key factors regarding ReactJS that you must avoid using:

  1. Continuous use of state unnecessarily

ReactJS states created with useState or useReducer are quite useful, but you don’t have to put everything in that state. Many new developers are struggling with this very concept. They don’t know when to put something in that state and when not to put it in. You must store little data in your state making sure you would be able to retrieve data that has been stored in other variables or states.

  1. Don’t use Redux when you don’t need to

It is recommended to use Context instead of Redux which is a dependency injection mechanism and can become a state management system. You can use the useReducer hook or the useState hook to manage it which will allow you to avoid passing data through many layers of components.

  1. Redux & Caching

Most of today’s application requires a server state cache. When you are in the REST API, there are several libraries with caches like React Query or Vercel SWR. You don’t need Redux for caching. 

Redux is a popular state management tool that enables many use cases at the same time as the cache status, UI status, complex data management on the client, middleware, etc. Ultimately, it depends on the particular problem of the app you’re trying to solve. Usually, all you need is partial Redux functionality.

  1. Declare a component within a component

This should particularly be avoided because of the following reasons:

  • Internal components will now depend on the scope of the parent component.
  • Internal components are rarely reusable.
  • Internal components cannot be exported. It can only be passed as a prop below the range, but this is not ideal.
  • As each parent component is rendered, the internal component’s declarative functions are rebuilt.
  • In addition to performance issues, the previous state is also lost.
  • To avoid this problem, save the components in their respective files.
  1. Use of props in the initial state

You must not set the initial reaction state to the value of reactive props because the state does not change unless you call the setState function, which is the state setter. If the prop is modified from the top layer, the component will get the modified prop, but the status will remain the same as the initial prop value. This issue breaks the concept of the single source of truth used by the component.

  1. Using the index as a key

The key must be unique to properly track elements. If the index is used as a key, it can easily be duplicated and elements can be added or subtracted from the center of the array. The key will eventually be the same as before, and React will assume it is the same element/component as before. This can have undesired effects.

  1. Frequent use of spread operators

Spread operators can help manage and reduce code and are also useful for declaring reusable components, creating new data objects that reuse data, and passing arguments to functions. However, developers often make the mistake of using the prop spread operator to set incorrect or unwanted props for a component. This can cause the console to display the following error code: Spread operator potential error.

  1. Improper use of UseEffect, useMemo, and useCallback

The React hook introduces the concept of dependencies that consist of elements and shouldn’t be overcrowded by the presence of many of these elements. These elements are not used conductively or are inappropriately utilized.


You can hire dedicated ReactJS developers that will use the best practices and void the anti-patterns diligently. This will make your life as a programmer much easier and avoid many mistakes and potential refactoring. You can also gain deeper insights into how ReactJS and front-end developers work, how ReactJS works, how to add security, and how to build components and applications. 

When you start using ReactJS, you’ll find clean, crisp features with code reusability, advanced reaction components, the addition of individual state variables, and other small pre-built features to simplify usage.

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