How to Correctly Render Component State in JavaScript Using useState in Next.js

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In the given scenario, the developer is running into an issue where the data fetched is correctly logged in the console but does not render appropriately in the component's UI. Instead of displaying all the entries, it's only showing the last one edited. This can be frustrating as it seems that the logic is functioning correctly in isolation, but the rendering does not reflect the intended result.

Here’s the original code that’s causing the issues:

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

What’s Going Wrong?

The issue primarily stems from using setDynamicValues inside a loop while also trying to reference dynamicValues directly, which can lead to inconsistent state updates.

React may not batch the updates in the way you expect, leading to only the last addition being retained in the state.

The Solution: Refactoring the Code for Correct Rendering

The solution involves building an array with the intended values before setting them in the state, rather than updating the state inside a loop. Let’s break this down step-by-step:

1. Create A Temporary Array

Instead of pushing items directly into the existing state, create an intermediate array that accumulates all necessary translations.

2. Set State Once after Populating the Array

Once you have gone through all translations, update the state once, ensuring it reflects all entries instead of just the last one. Here's the corrected version of the code:

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

Key Takeaways:

Batch State Updates: Instead of updating state for each iteration, accumulate data first and then set it all at once. This prevents rendering issues and ensures that React has the complete dataset for rendering.

Debugging: If your data seems to render incorrectly, inspect how you are updating states, especially within loops.

Conclusion: Is This the Right Way?

By following these steps and principles, you should have a clearer path to managing states effectively in your React components.

Happy coding!