Скачать или смотреть Creating a React Component with TypeScript

Learn how to convert a React component into TypeScript while following best practices. This post walks you through a practical example, covering types, hooks, and rendering logic.
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This video is based on the question https://stackoverflow.com/q/67968477/ asked by the user 'Luc Mosser' ( https://stackoverflow.com/u/13640675/ ) and on the answer https://stackoverflow.com/a/67968580/ provided by the user 'MaartenDev' ( https://stackoverflow.com/u/6310593/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Creating a React Component with TypeScript: A Step-by-Step Guide

If you're diving into the world of TypeScript, you may find yourself looking to revise your existing React components to leverage the type safety and best practices that TypeScript offers. In this guide, we'll explore how to effectively convert a simple React component into TypeScript, explaining each step along the way.

The Problem: Converting a Fake React Component

You might have a React component that looks something like this:

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

While the above code functions, it won't take full advantage of TypeScript's capabilities, primarily because it's using any for props and lacks proper hook placement. Let's fix that!

The Solution: Step-by-Step Conversion to TypeScript

1. Define Props with an Interface

The first step in modernizing our component is defining the props with a TypeScript interface. This not only improves code readability but also enhances type safety.

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

2. Use Functional Component Type

TypeScript offers a built-in type for functional components. We'll utilize FC (Functional Component) from React for our component definition:

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

3. Adjust the useState and useEffect Hooks

Ensure hooks like useState and useEffect are invoked outside of conditional statements. Below is how to set them up properly:

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

4. Rendering Logic

We need to modify the rendering logic to ensure it operates correctly based on the show and isLists props:

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

Complete Code Example

Here’s the fully converted component:

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

Conclusion

Converting a React component to TypeScript not only improves maintainability but also enhances the overall safety of the code. By defining the props using interfaces, structuring hooks correctly, and implementing proper rendering logic, we can create a robust component that stands the test of time.

Whether you're new to TypeScript or brushing up on your skills, this guide serves as a solid foundation for transforming your React components.