Fixing the TypeError in React Wallet Context

Encountering a `TypeError` when accessing state variables in your custom React context hook? Learn how to fix it and understand the core concepts involved in the process.
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Fixing the TypeError in React Wallet Context: A Step-by-Step Guide

Understanding the Problem

You might encounter the following error when attempting to access a state variable via a custom hook in your React application:

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

This type of error usually occurs when there’s a confusion between destructuring arrays and objects. In the context of your Wallet application, let's examine how everything is set up.

Context Setup

You have defined a WalletContext using the createContext function to store various pieces of state related to wallets:

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

In your WalletProvider, you set up the provider to deliver its values through the context. Here’s a brief overview of how you've set it up:

You wrap your main application component in the WalletProvider.

You pass an object to the context provider that contains state variables and functions required by your components.

The Error Source

The line of code causing the issue is where you're using the custom hook, useWallets:

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

In this instance, you are trying to destructure a property as if it were an array. However, useWallets returns an object containing various state variables and methods, not an array.

The Solution

To resolve this error, you simply need to adjust how you're accessing the properties of the returned object from your custom hook. Change the destructuring syntax from array-style to object-style:

Correct Code

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

This adjustment properly matches the structure of what useWallets returns, allowing you to access the walletFound variable correctly.

Step-by-Step Change

Identify the custom hook usage: Locate your usage of useWallets within your components.

Check return value: Understand that useWallets returns an object, not an array.

Update destructuring: Change from array destructuring ([]) to object destructuring ({}).

Conclusion

Understanding how to manage state in React using context and hooks can be a bit tricky, especially with the syntax involved. By ensuring that you're destructuring objects and arrays correctly, you can avoid common errors like the one we addressed. Always take a moment to verify how you're accessing your data, and you'll find that many issues can be resolved quickly.

By following the steps outlined above, you should now be able to eliminate the aforementioned TypeError and successfully access your state variables without any further issues. Happy coding!