Solving the banner.map is not a function Error in Next.js API Calls

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Understanding the Problem

The Code Breakdown

Here's a simplified version of the code that is causing the error:

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

In this code, data is expected to hold an array of banners. However, the actual response from the API is structured differently, leading to the error when you attempt to call .map() on it.

The Solution

Accessing the Right Data Object

Here’s how to adjust your code:

Modify the return statement in getStaticProps to access the correct object:

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

Corrected Code Snippet

With that change, your code should look like this:

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

Testing Your Changes

Now that you’ve updated the return statement to accurately access the array of banners, run your application again. You should no longer see the error message and your fetched data should render correctly on the page.

Conclusion

Important Takeaways:

Always inspect the structure of API responses.

Ensure you’re mapping over arrays, not objects or undefined.

Debug methodically to pinpoint where the data handling went awry.