Resolving the Objects are not valid as a React child Error in react-router-dom

Learn how to fix the common "Objects are not valid as a React child" error encountered when using react-router-dom, especially in version 6.14.0.
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Resolving the Objects are not valid as a React child Error in react-router-dom

If you're working with react-router-dom version 6 and have encountered the error: "Objects are not valid as a React child (found: [object Promise])", you're not alone. This error typically occurs when React attempts to render something it cannot understand, often due to asynchronous behavior in your components. In this post, we will break down the causes of this error and how you can resolve it.

Understanding the Error

This error occurs when you unintentionally try to pass a Promise object as a React child. In simpler terms, React expects elements like strings, numbers, or valid components, but it finds a Promise instead.

What Causes This Error?

Async Components: If any of your components are defined as asynchronous functions, they may return a Promise:

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

Instead, React needs a synchronous function that returns JSX:

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

How to Fix the Issue

Examine Your Components: Review all the components used in your routing. Specifically, check for any component that might be declared as an async function. Make sure they follow the standard synchronous component structure.

Check Imports: Ensure all imported components are not inadvertently exporting Promises. Each component should be exporting a simple function that returns JSX.

Inspect Route Definitions:
When you set up your routes within the App component, ensure that each Route's element prop is receiving valid React elements:

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

Example Fix

Here's how you can redefine an async function to ensure it properly serves as a React component:

Before (Async Version):

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

After (Synchronous Version):

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

Conclusion

By ensuring that all your React components are synchronous and properly exporting valid JSX, you should be able to resolve the "Objects are not valid as a React child" error in your application using react-router-dom. This adjustment will help React correctly interpret your components and render them without issue.

If you continue to face challenges, consider revisiting your component logic or reviewing the documentation for react-router-dom for different patterns to handle data fetching.

We hope this post has helped you clarify the cause of the error and provided you with a clear pathway to resolving it. Happy coding!