Defining Props Correctly in React Navigation with TypeScript

Описание: Learn how to define props in a React Navigation stack using TypeScript to avoid common errors.
---
This video is based on the question https://stackoverflow.com/q/66782244/ asked by the user 'Faire' ( https://stackoverflow.com/u/6188400/ ) and on the answer https://stackoverflow.com/a/66790581/ provided by the user 'Linda Paiste' ( https://stackoverflow.com/u/10431574/ ) 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: How should I define type of props supplied by react-navigation?

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.
---
How to Properly Define Type of Props in React Navigation with TypeScript

In modern React Native applications, navigating through screens is a common requirement. React Navigation is one of the popular libraries that facilitates this navigation. However, when using TypeScript with React Navigation, defining types for props can sometimes be perplexing. If you have ever encountered issues surrounding the props related to navigation, you're not alone! In this post, we will tackle the common problem of defining props using react-navigation and TypeScript and ensure you're equipped with the right strategies to avoid confusion.

Understanding the Problem

Imagine you're working on a React Native application with a stack navigator, and you want to define props for a screen component effectively. Here’s a brief look at the situation:

You have defined a stack navigator with various routes.

Each screen might need different props; for example, your Sheet component expects a sheet object.

When trying to use the sheet property, an error surfaces: "Property 'sheet' does not exist on type 'StackScreenProps<RootStackParamList, NavigationLocations.SHEET>'." This can be frustrating, especially when you're confident about your prop types.

Solution Overview

The main issue here revolves around how you define types for your props in conjunction with your stack navigator setup. The default type provided by StackScreenProps does not directly expose the parameters you want, which often leads to confusion.

Let’s walk through the correct way to define and access these props.

Step 1: Define Your Navigation Stack Param List

Your navigation stack's parameters should directly map out to the components they relate to. From your question, you have this:

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

Step 2: Set Up the Props Type for Your Component

Instead of attempting to destructure the sheet prop directly from the props, you should first define the props type to include navigation and route. The correct implementation will look like this:

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

Step 3: Accessing the sheet Object Properly

Instead of trying to access sheet as a direct prop in your component's definition, access it through the route parameters. This way, you can effectively extract the sheet object from route.params. Here is how your component definition should look:

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

Why It Works

Destructuring in Function Parameters: When you destructure props directly in the component signature, ensure it's from a correctly defined type that includes navigation and route.

Using Route Parameters: Accessing the properties wrapped inside route.params ensures that TypeScript understands where the object comes from.

Conclusion

Defining types for props in React Navigation using TypeScript can indeed be tricky at first, but by structuring your props correctly, you can avoid common pitfalls. Remember to always access nested properties like sheet through route.params. Utilizing enums for identifiers, as you have done with NavigationLocations, adds clarity and robustness to your navigation structure.

By following these structured steps, you should find it much easier to set up your navigation props without running into the dreaded TypeScript errors. Happy coding!