Resolving the Too many re-renders Error in React Applications

Learn how to fix the common `Too many re-renders` error in React by restructuring your state update logic to prevent infinite loops.
---
This video is based on the question https://stackoverflow.com/q/65539122/ asked by the user 'Jaburu' ( https://stackoverflow.com/u/14656345/ ) and on the answer https://stackoverflow.com/a/65539190/ provided by the user 'akram-adel' ( https://stackoverflow.com/u/14024072/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Error: Too many re-renders. React limits the number of renders

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/licensing
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/by-sa/4.0/ ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Resolving the Too many re-renders Error in React Applications

When working with React, encountering the error message "Too many re-renders" can be frustrating, especially when trying to implement features like filtering an array. This error indicates that your application is caught in an infinite loop of rendering, usually due to improper state updates. In this guide, we'll break down why this happens and provide a structured solution to resolve the issue.

Understanding the Problem

The most common situation for facing the too many re-renders error is when you update the component's state in a way that inadvertently causes React to re-render your component continuously. For instance, if you call a state setter (like setOrigensFilter) directly within the component's main body, this leads to React immediately re-rendering the component to reflect the state change, which again triggers the state update.

Here’s a key piece of code that was causing the issue:

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

In this snippet, calling setOrigensFilter directly leads to a rerender, which in turn calls the same line producing an infinite loop.

The Solution

To resolve this, we can encapsulate the filter logic and the state update inside its own function. This can prevent the automatic execution of state updates when the component renders. Let’s break this down:

Step 1: Create a Filter Handler Function

Instead of placing the state setter directly in the component's body, create a handler function that performs the filtering and then updates the state.

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

Step 2: Execute the Handler When Necessary

Now, you need to call this handler function at appropriate times, such as when chosenCliente changes. You can use the useEffect hook to execute the handler whenever chosenCliente changes:

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

Complete Example

Here’s how your code might look with the new logic implemented:

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

Conclusion

By wrapping your state updates within a dedicated function and calling it only when necessary (via hooks like useEffect), you can avoid the Too many re-renders error in React. This solution not only resolves the issue but also makes your component’s logic cleaner and easier to understand. Implement this pattern anytime you need to conditionally update state based on certain dependencies, and your React application will behave much more predictably.

Видео Resolving the Too many re-renders Error in React Applications канала vlogize