Why Does My React App Render Twice in Debug Mode, and How Can I Fix It?

Resolving Double Rendering in React with Strict Mode

In debug mode, React components may render twice due to the enabled Strict Mode. This diagnostic feature helps identify potential problems in your code.

Understanding Strict Mode

StrictMode operates in development environments (not in production) and aims to uncover potential issues by:

• Performing double renders
• Imposing stricter rules
• Enhancing the clarity of error messages

Disabling Strict Mode

If you intentionally disabled Strict Mode, it could be due to using create-react-app or similar tools that automatically enable this mode.

In your index.js file, you might notice the {app} component wrapped in . To disable this, simply remove the tag:

  ReactDOM.render(
    {app}
    document.getElementById('root')
  );

Remember, while Strict Mode helps identify potential issues, it's not mandatory. You can choose to disable it if it interferes with your debugging process.

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