Скачать или смотреть Resolving the Proxy Error in React JS: Why It Works in Firefox But Not in Chrome

Encountering proxy errors in React applications specifically while using Chrome? This guide provides a step-by-step solution to get your app running smoothly.
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Understanding the Proxy Error in React Apps

If you're developing a React application using tools like Learna, you might encounter a frustrating situation where your app works perfectly fine in Firefox, but you hit a proxy error in Chrome. This issue can disrupt your workflow and can be particularly puzzling, especially when you're accessing APIs behind a VPN.

In this guide, we'll outline the problem you're facing and provide a step-by-step solution to resolve the "Could not proxy request" error that you're seeing on your console.

The Problem

You are trying to load your React application through localhost:3000, but upon doing so, you receive the following error message in your terminal:

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

This issue is exclusive to Chrome, as the application runs without any difficulty in Firefox. Additionally, using a VPN to access login APIs results in a 401-unauthorized error, even when it seems to operate normally in Firefox. It's only natural to wonder whether the problem lies within Chrome's proxy settings.

The Solution

Fortunately, resolving this error is straightforward. Follow these steps to adjust Chrome’s settings and eliminate the proxy error you're experiencing:

Step 1: Open Chrome Flags

Navigate to Chrome Flags: In your Chrome browser, type in the following URL and press Enter:

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

Step 2: Search for Specific Flags

Search for and Disable Cookies Settings:

Use the search bar on the Chrome flags page to look for the following flags:

SameSite by default cookies

Cookies without SameSite must be secure

For both flags, change the setting from Default to Disabled.

Step 3: Restart Chrome

Close and Reopen Browser: After making the changes, you will need to close the Chrome browser completely and then restart it for the changes to take effect.

Additional Considerations

Proxy Settings: If you're still facing issues, double-check that you have configured localhost in your proxy settings to be ignored. This can sometimes help avoid unnecessary complications during development.

Package.json Adjustments: Though you mentioned trying secure: false in your package.json, ensure that it's appropriately set if you're dealing with secure connections.

Conclusion

Once you've followed the instructions above, your React application should be able to run without encountering the proxy error in Chrome. This adjustment to the cookie behavior alleviates compatibility issues between your application and the browser.

Test the application again, and you should notice a smoother experience, allowing you to focus on development rather than troubleshooting. If problems persist, consider checking other areas of your setup.

Feel free to comment below if you have any further questions or run into other issues while working with your React application!