Скачать или смотреть Solving Network request failed Error in React Native Windows Projects

Discover how to resolve the `Network request failed` issue in your React Native Windows project, ensuring smooth network calls and functionality.
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Troubleshooting Network Calls in React Native Windows: The Network Request Failed Error

If you've been developing with React Native on Windows, you may have encountered an unexpected issue where network calls fail instantly, resulting in a frustrating TypeError: Network request failed. This can happen even on a fresh project setup, and it can feel perplexing—especially when you're sure the API you're calling works fine outside of React Native. In this guide, we'll explore what might be causing this issue in your React Native Windows project and, more importantly, how to resolve it.

Understanding the Problem

Imagine setting up your React Native Windows project, crafting your API calls, and running into the dreaded TypeError straightaway, with no clear indication of what went wrong. To summarize the symptoms:

Network calls fail instantly: The requests don't seem to attempt execution, immediately triggering the catch block.

Different libraries produce the same error: Using libraries like axios or the native fetch API yields consistent TypeErrors.

Successful API tests: You can verify that the API is reachable through tools like Postman, narrowing down the issue to your React Native setup.

Example Error Output

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Additionally, you might see other warnings related to your development environment. These can often complicate the situation further.

Finding the Solution

After exploring various troubleshooting steps, including clearing caches, reinstalling modules, and testing API calls with different methods, the breakthrough came from a deeper examination of the Visual Studio settings. Here’s what you need to do:

Step 1: Open Visual Studio

Instead of your regular code editor (like VS Code), you need to access Visual Studio because some settings are exclusive to it.

Step 2: Modify Project Capabilities

Navigate through your project to enable the necessary network capabilities:

Open your project within Visual Studio.

Locate and double-click on the Package.appxmanifest file in the Solution Explorer.

In the "Capabilities" section of this manifest file, ensure that you have checked the "Private Networks (Client & Server)" option.

This setting permits your application to communicate over private networks, such as sending requests and receiving data from APIs without restrictions.

Step 3: Save and Re-run Your Application

After applying these changes, save the manifest file and re-run your application. Use the commands:

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This should help in reinitializing the application environment with the new configurations.

Conclusion

Errors related to network requests can indeed be frustrating, particularly when you feel you've checked all the common issues. The key takeaway here is the necessity of setting up appropriate permissions in Visual Studio for your React Native Windows projects. By enabling the "Private Networks (Client & Server)" capability, you can ensure that your network calls function seamlessly.

Feel free to revisit this guide whenever you find yourself in a similar situation—it might save you hours of digging through configurations or code, just like it did for me! If you have any further questions, don’t hesitate to drop them in the comments below. Happy coding!