HMR not working about create-react-app HOT 1 OPEN

Steps to Troubleshoot HMR Issues
1- Check Your Environment:

Could you make sure you're running the app in development mode? HMR typically doesn't work in production builds.

2 Ensure Dependencies are Up-to-date:

Update your dependencies using npm update or yarn upgrade. Sometimes, HMR issues are related to outdated dependencies.

3 Check Webpack Configuration:

If you've ejected your Create React App or customized the Webpack configuration, ensure HMR is properly configured. HMR requires specific setup in Webpack to work correctly.
Server Configuration:

Ensure your development server supports HMR. The default development server provided by Create React App should support it out of the box.

4 Console Logs and Errors:

Check the browser console and terminal for any errors or warnings related to HMR. These logs often provide clues to what might be going wrong.

5 Network Tab:

Use the Network tab in your browser's developer tools to see if HMR-related requests are being made and if they are returning expected responses.

6 Restart Development Server:

Sometimes, simply restarting the development server can resolve HMR issues.

7 Clean Cache and Rebuild:

Clear your browser cache and try restarting your development server. You can also delete the node_modules directory and reinstall dependencies.

from create-react-app.