Resolving Map Issues in React: Handling Asynchronous Data Correctly

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Understanding the Problem with Asynchronous Data in React

This can indeed be confusing, especially if your child components render correctly when passing a single object but fail with multiple objects. So, what’s going wrong here?

The Issue at Hand

You might have set up your code as follows:

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

In this setup, the map is being updated asynchronously. The problem arises because you are calling setHealthWards(map) before all the API requests have completed. This results in your map being empty when you check its size or values.

Step-by-Step Implementation

Create a new Map to hold your data.

Update your state once all asynchronous requests complete.

Here is the corrected version of your data fetching logic:

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

Explanation of Changes

Const geoData: This initializes the Map that you'll be populating with your fetched data.

Conclusion

By implementing these changes, you should be able to pass multiple objects effectively and allow your components to render as expected. Happy coding!