How to Refactor Common Set State Functions in ReactJS

Learn how to efficiently `refactor` your ReactJS components by creating custom hooks for shared state logic, avoiding repetitive code.
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How to Refactor Common Set State Functions in ReactJS

In React development, there are often situations where multiple components require similar functionalities. One common occurrence is needing to set local state in more than one component. This can result in code duplication, which makes maintenance difficult and prone to errors. In this post, we'll explore how to effectively refactor shared state handling in React using custom hooks, so you can keep your code DRY (Don't Repeat Yourself).

The Problem at Hand

Consider the following scenario: you have two components, Trending and Saved, both of which manage similar states and functions for handling a book click. Here’s a simplified version of their code structure:

Component 1: Trending

[[See Video to Reveal this Text or Code Snippet]]

Component 2: Saved

[[See Video to Reveal this Text or Code Snippet]]

As you can see, both components handle state management in the same way, which is not only repetitive but also makes your code less maintainable.

The Solution: Creating a Custom Hook

To avoid the redundancy in these components, we can create a custom hook that encapsulates this shared logic. Custom hooks allow us to extract component logic into reusable functions.

Step 1: Create the Custom Hook

Here's how you can define a custom hook called useBooks. This hook will contain the shared state and the functions required to manipulate that state.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Use the Custom Hook in Components

Now, instead of duplicating the state and functions in multiple components, you can simply use this custom hook in any component that requires it.

Updated Component 1: Trending

[[See Video to Reveal this Text or Code Snippet]]

Updated Component 2: Saved

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By using this custom hook approach, you effectively eliminate the repetition of state management logic in different components. Not only does this make your code cleaner, but it also simplifies maintenance and future enhancements. Whenever you need to change the logic for how books are handled, you can now do it in just one place—the custom hook.

If you're looking to refactor your React components, consider applying this technique to enhance the reusability of your code. Happy coding!