How to Fix Data Not Showing in React after Fetching from Backend Easily

Discover the simple solution to fix your data not displaying correctly in your React application after fetching from the backend. `Step-by-step` guide for beginners.
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Fixing Data Not Showing in React after Fetching from Backend

As a beginner in React, it's common to face challenges when dealing with data fetching and rendering. One typical issue you might encounter is when your application fetches data correctly, but it doesn’t display properly on the page. This problem usually occurs due to the timing of state updates and rendering. In this guide, we will provide a comprehensive guide on how to resolve this issue.

Understanding the Problem

When you fetch data from the backend in a React application, the fetched data may not be immediately available when your component renders. This can result in a situation where your HTML is displayed without the expected data, leading to confusion and frustration.

Symptoms of the Issue:

Data fetching is successful without any errors.

The component loads with an empty state or an initial message (like "Nothing to show").

The application needs to wait for the data to render correctly.

Solution Steps

Here’s a step-by-step guide to resolve the problem of the data not displaying once it is fetched:

Step 1: Create a State for Filtered Hospitals

Instead of managing multiple states for your fetched hospitals and filtered results, simplify the structure by combining these into a single state that holds the filtered data. This will simplify your rendering logic and ensure the correct data is shown on the first load.

Define a new state filteredHospitals to hold the data to display:

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

Step 2: Update the Data on Fetch

When you fetch your hospital data from the backend, you should initialize both the main list and the filtered list. Here’s how to achieve that:

Set both Hospitals and filteredHospitals when you receive the response:

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

Step 3: Implement Filtering Logic

Use the filtering logic to update the filteredHospitals whenever the search input changes. This way, you're consistently updating the data shown in your component:

Adjust your filtering logic with a single state update:

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

Step 4: Conditional Rendering for Display

Finally, ensure that you provide feedback when no hospitals meet the criteria. Use conditional rendering based on the length of filteredHospitals:

Update your return statement to show a message if there is no data:

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

Conclusion

By using a structured approach to managing your state and simplifying the filtering process, you can avoid common pitfalls that lead to issues with displaying fetched data in React. Remember to test your implementation to ensure that all edge cases are handled, and enjoy the seamless experience of seeing your fetched data appear as expected!

If you found this post helpful, please share it with your fellow React developers. Happy coding!