Скачать или смотреть Understanding How to Convert Props from JavaScript to TypeScript in React

A simple guide for React developers transitioning from JavaScript to TypeScript, detailing how to properly type props and assign component properties.
---
This video is based on the question https://stackoverflow.com/q/62399841/ asked by the user 'Errand' ( https://stackoverflow.com/u/10801802/ ) and on the answer https://stackoverflow.com/a/62400137/ provided by the user 'emartini' ( https://stackoverflow.com/u/879284/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: convert props from javascript to typescript in react

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding How to Convert Props from JavaScript to TypeScript in React

If you're a React developer, you might have considered transitioning your code from JavaScript to TypeScript. TypeScript adds a powerful type system to JavaScript, which can help catch errors earlier, improve code quality, and make your code more maintainable. However, this transition can come with some challenges, especially when it comes to typing props and maintaining component properties.

In this guide, we'll explore a common scenario where React components have to be converted from JavaScript to TypeScript. We'll show you how to handle the typing of props effectively and address the specific issue of typing component properties like A.name and B.last.

The Problem

Let's start by looking at our JavaScript component structure:

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

In this code, we have three components: A, B, and C. Each component has its own props, and components A and B have their own properties (name and last, respectively). The challenge arises when we want to convert this structure into TypeScript while maintaining those properties.

The Solution

To convert these components to TypeScript while keeping their properties, we can define interfaces to type the props and create extended types for the components. Let's walk through the steps.

Step 1: Define Props Interfaces

First, we need to define the interfaces for the props of each component:

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

Step 2: Extend React.FC to Include Component Properties

Next, we will create extended types for our components to include their specific properties (name for A and last for B):

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

Step 3: Define the Components

Now, we define the components themselves, ensuring to assign the properties correctly:

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

Summary

With this approach, we have successfully converted our JavaScript components into TypeScript. We've achieved:

Type definitions for props using interfaces.

Extended React's functional component type to incorporate additional properties.

Maintained the structure and properties of our original components.

Conclusion

Transitioning from JavaScript to TypeScript in React doesn't have to be daunting. By carefully defining props and using extended types, you can retain the functionalities and properties of your components. This not only enhances code quality but also improves the overall development experience.

Now that you understand the process of converting props from JavaScript to TypeScript, you can start applying your knowledge to existing projects and enjoy the numerous benefits TypeScript has to offer.