React Best Practices 3 React Best Practices
Review: 5 - React Best Practices

No matter how considerable time has passed and what competitors appear on the market, React is still at the top of frameworks.

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Shall we begin with React best practices? Let’s take a look at some best practices for using this framework. Follow these simple tips to make your React application competitive and work correctly. The practices we mentioned are successful examples of how you can improve the functioning of your project.

What is React? Usage of React

React.js is an open-source JavaScript programming language framework. With this framework, developers can create user interfaces of different levels of complexity for single-page applications. You can use this technology to handle the presentation level of web and mobile applications. React currently has the largest community of any other framework. Take advantage of open data libraries and tips from creators around the world to make your interaction with the framework as productive as possible.

React was first used in the Facebook social networking feed in 2011. With this framework, developers can create large web and mobile apps and modify data without reloading the page. It’s a fast, simple, and scalable framework. Use it with a combination of other libraries to create interesting applications. So here we go with react JS best practices

Keep components small and function-specific

What are the benefits of components? It is known that thanks to the React framework, you can get huge components that help you accomplish several tasks. But the best way to design components is, of course, to make them simple and small. That way, you can provide one component to perform just one function. If a single component can render a certain part of an application page or change its behavior, you have done your design task well. 

Components will most often be completely self-contained. That makes maintenance and testing at different stages of development much easier. It’s also important that developers reuse each component in numerous projects at once. You can borrow components that perform common functions from community forums. Remember that the smaller the component, the easier it is to optimize performance and the update process. 

As you can see, smaller components give you more room to implement your projects. At the same time, larger components will take up more space and be less flexible. You can use components as you see fit and combine them depending on the goals and needs of your particular project. Take advantage of the expertise of the framework community because there are many solutions for different tasks.

Put CSS in JavaScript

At the first stage of project development, keeping all CSS styles in a single SCSS file is usual. By implementing a global prefix, you can prevent all possible name conflicts. Still, there are cases where this solution will not be appropriate. For example, scaling a project.

Creating a style and theme can be very challenging during the development of large projects. However, maintaining these large SCSS files is not an easy task either. It is the reason why the concept of CSS-in-JS solutions appeared. Such libraries are based on this concept: EmotionJS, Styled Components, Glamorous. 

Use the libraries listed above, depending on what your project requirements are. For example, you can use Styled Components or Glamorous for more complex themes.

Use a linter

Linking is one of the important elements in the project development process that allows you to run a program to analyze the code for possible errors. 

Usually, developers use this element to solve problems related to the programming language. However, you can also use it to automatically fix other issues, such as incorrect code style. If you use the linter in your React code, you can keep your code free of bugs and errors.

Comment only where necessary

It is one of the framework’s best practices react and an opportunity to achieve two goals simultaneously. Use the ability to leave comments only when necessary and benefit the development process. That way, you can leave visual clutter in the code and avoid possible conflict between comments and code. If you are going to change the code, later on, comments can prevent your product from working correctly.

So remember that you should only leave comments where you can’t otherwise.

Use capitals for component names

If you use JSX for development, all new component names must start with capital letters. It is necessary so that JSX can identify and handle them differently from the default HTML tags.

Previous versions of React supported all inline names fully. That made it possible to distinguish them from the usernames. However, this system had a disadvantage. Lists of names were constantly updated. So it was customary to use capital letters by default to name components.

If your application is not written in JSX, you can use lowercase letters again. However, keep in mind that this may affect the reuse of components in other projects.

Separate stateful aspects from rendering

All components in the React framework may or may not have been stated. Those components with state tracking capability store the component’s state data and provide the necessary context for development. 

On the other hand, those components without a state have no memory and cannot provide context for other UI components. They take input from the parent component and return JSX elements in return. Keep in mind that it’s possible to scale and reuse them, and it’s also similar to pure functions in JavaScript.

One of the best React good practices is to keep the structure and loading logic of external data with state preservation separate from the rendering logic without state preservation. In that case, you’re better off having multiple or one component with state tracking to load data and a separate component without a state to display that information. It reduces the complexity of the components considerably.

Later versions of React have an advanced feature called React Hooks, which gives you the ability to create components for state tracking functions. As a result, this makes it possible to remove the need for class-based components.

Let’s say your project receives information during rendering. You need to manage the information in the main component and then pass the complex rendering task to a subcomponent as properties.

The code should be testable

The code you write as part of your project can easily be tested and verified. Keep this simple rule in mind when writing code. By the way, here’s one of the best react practices. Give test files the same name as the original file, adding the suffix ‘.test.’ It will make it much easier for developers to find files that have already been tested before.

Use applications like or JEST to test your React code. Your project code should behave properly and be easily and quickly tested by testers. If your code is difficult to test, you will have problems with other phases of project development.

All files related to anyone component should be in a single folder

An obvious but important tip is that you should keep all files that belong to the same component in the same folder. It also applies to code-style files. 

If you use a separate component only within a larger component, keep all the smaller components in the same folder. Then you will have a simple hierarchy and structure, and it will be easier to find the components you need. Use a strict structure and folders within folders to make extracting or changing code for other projects easier.

One folder should contain CSS styles, images, tests, and other subcomponents related to a specific component. If you name the files succinctly and logically place similar and related files together, you’ll have an easier time finding them later if required.

Use defaultProps and propTypes

As your project grows, you may notice a few bugs with type checking. For specific projects, you can use JavaScript applications such as Flow or TypeScript. However, React still has basic type checking capabilities if you don’t use them. To trigger type checking for component props, you can assign a special propTypes property, which you’ll find React services best practices thanks to the large community of users of this framework.

Do you want to create your own website? – Feel free to contact us!

If you want to create your own web project based on React but don’t have a team of experienced developers, you’ve come to the right page. We at Fireart Studio are ready to help you develop an app or a website according to your requirements and goals. All you need to do is just contact us and describe your project idea.


We’ve looked at the most popular React good practices. As you can see, there are certain tips to help you make your interaction with this framework as productive as possible. Remember that this particular framework has the largest fan base worldwide, so you can apply common practices that community members share on forums.


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