reactjsHow can I fix the "process is not defined" error when using ReactJS?

The "process is not defined" error is a common issue when using ReactJS. This error occurs when the process global variable is not defined. The process global variable is defined in Node.js and is not available in the browser.

To fix this error, you need to use a library like process.env or dotenv to access environment variables in the browser.

For example, using dotenv:

// In your .env file
REACT_APP_API_KEY=123

// In your application code
import dotenv from 'dotenv';

dotenv.config();

console.log(process.env.REACT_APP_API_KEY); // Output: 123

The code above imports the dotenv library, loads the .env file and logs the value of the REACT_APP_API_KEY environment variable.

To learn more about how to use dotenv to access environment variables in ReactJS, please refer to the following links:

• The Basics Of Environment Variables In React
• Using dotenv with Create React App

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