Avoid these common mistakes when using ReactJS

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ReactJS is known for its potency in crafting robust web applications. Yet, the JavaScript library poses distinct challenges for developers navigating the ever-changing landscape of web development.

To ensure an efficient development process, developers must remain attentive and acknowledge the most common challenges when working with React. This article aims to shed light on the typical stumbling blocks that beginner developers may face in React development.

Insufficient component creation

One of the frequent errors observed among React developers is their tendency to avoid creating an adequate number of components.

While React allows the creation of sizable components that perform multiple tasks, adopting a practice of keeping components smaller, with each component serving one specific function, proves more advantageous. Not only does this approach save time, but it also facilitates debugging, as you can easily identify the components linked to any potential errors that might occur.

Steer clear of direct state modification

Ensuring state immutability is fundamental in React. Modifying the state directly can lead to performance issues that are difficult to resolve. To prevent such complications, it is imperative to maintain the state as immutable consistently.

For example, you might encounter an issue when attempting to update the checked key of an object in an array using a checkbox’s state in React. The problem arises because React cannot observe and trigger re-rendering because the object is modified with the same reference.

To address this problem, there are two possible solutions — either the setState() method or the useState() hook. Implementing either of these methods will ensure that React recognizes your changes and correctly re-renders the DOM.

Developing God components

In React, God components present a monolithic structure, rendering them non-reusable and deemed an “anti-pattern.”

Rather than consolidating all UI elements into a single component to build an entire page, it is better to take the time and create individual components for different interconnected parts of your application.

This practice fosters easier maintenance and facilitates seamless restructuring whenever necessary.

Excessive use of useCallback and useMemo

Be cautious not to go overboard with hooks like useCallback and useMemo in your React code. While they are powerful tools, using them excessively by wrapping every function or variable can backfire, introducing unnecessary overhead and slowing down performance.

For instance, if you have a large array as a dependency, the calculations for dependency changes might take more time than the gains from optimizing with these hooks.

So, make thoughtful decisions when applying these hooks, ensuring a harmonious trade-off between optimization and overall performance for your React application.

Inefficient use of useEffect

In React 18, using hooks like useEffect properly is crucial because of concurrent rendering. Misusing useEffect can lead to performance problems, side effects and complex debugging scenarios.

UseEffect is best suited for situations involving side effects with external implications, such as data retrieval from a server, event subscriptions or DOM updates. These effects frequently occur asynchronously and unpredictably, demanding careful management within our components.

React emerges as a potent library, empowering developers to craft web applications that are robust, high-performing, and easily maintainable. However, it is important to grasp its intricacies and adhere to best practices to leverage its capabilities thoroughly.

By steering clear of the common pitfalls discussed in this article, you can ensure that your React codebase remains efficient, reliable and straightforward to manage.