Resolving the 'React' is not defined no-undef Error in React

Learn how to fix the common error `'React' is not defined no-undef` when creating React elements without JSX. Follow our simple guide to get your application running smoothly!
---

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Line 4:13: 'React' is not defined no-undef

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Understanding the 'React' is not defined no-undef Error

If you're a beginner working with React, you may have come across the frustrating error:
'React' is not defined no-undef. This commonly occurs when you're trying to create React elements without using JSX syntax. Let's break down what this means and how you can resolve the issue effectively.

The Context of the Problem

Imagine diving into your coding environment, bubbling with excitement about creating your React application. As you type away, you run into the following snippet of code that unleashes a flurry of error messages in your terminal:

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

The error message indicates that React is not defined.

This can happen if the interpreter doesn't recognize the React library in your current file, leading to compilation issues.

The Core of Your Issue

Upon examining the provided code, a few important notes emerge:

JSX Usage: Your App component returns JSX, meaning that React must be in scope to render the component properly. JSX is a syntax extension that allows mixing HTML with JavaScript.

A Simple Solution: Importing React

To fix this issue and avoid the compilation errors you're facing, you simply need to import React at the top of your file. Here’s how to do it:

Add the following line at the very top of your file:

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

Updated Code Structure

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

Conclusion

By following these steps and ensuring that you import React into your component file, you can eliminate the 'React' is not defined no-undef error. This not only allows you to create elements without JSX but also solidifies your understanding of how React works under the hood. Keep exploring and coding, and soon enough, you'll feel like a pro at tackling such issues!

If you encounter similar errors in the future, remember the importance of scope and import statements. Happy coding!