How to Create and Use the env Variable in React js || .env || React App Environment Configuration

Incorrect Variable Naming:
Ensure the environment variable in the .env file is correctly named and prefixed with REACT_APP_. For example:

Placing .env in the Correct Directory:

Restart the Development Server:
After making changes to the .env file, you need to restart the development server. Stop the server and run npm start (or yarn start) again.

Correctly Accessing Environment Variables:
Ensure you are accessing the environment variables correctly in your React

Environment Variable Availability:
Check if the environment variables are properly defined and not misspelled in the .env file.

If you have verified all the above steps and still face issues, try to:

Check for Typos: Ensure there are no typos in the .env file or in the code where you access the variables.
Create a New React App: Sometimes, configurations might be corrupted. Creating a new React app and copying your files there can help isolate the issue.

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