How to Properly Return Function Results in React from a Separate File

Learn how to return function results in React components by importing them from separate files. This guide provides a detailed solution, including code examples and explanations.
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How to Properly Return Function Results in React from a Separate File

If you are new to React, you might have encountered situations where you need to share functionalities across different components. A common challenge is returning values from functions defined in separate files and displaying these values in your React components. In this guide, we will walk through a practical example, guiding you on how to successfully achieve this.

The Problem

You have two files in your React project:

Understanding the Function Structure

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

This function takes an argument and uses a switch statement to set testVariable based on the input. It then returns the value of testVariable. While the setup is mostly correct, there are adjustments to be made to make it functional within the React component.

Revising the Code

Step 1: Update the getValue Function

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

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

Key Changes Explained

State Management: We are using useState to manage and track the state of the value returned by getValue.

Event Handling: The onChange event handler directly sets the state to the value returned by getValue, which is called with the selected option from the dropdown.

Display the Value: The value is rendered in the <div>{state}</div>, making it visible to users.

Conclusion

By following the steps outlined in this guide, you should now have a clear understanding of how to return results from functions defined in separate files within your React components. This knowledge will enhance your ability to manage state and functionality across your application, ultimately leading to a more organized and maintainable codebase.

Happy coding! If you have any further questions, feel free to reach out or leave a comment below.