How to Fix handleClick is not defined Error in Your React Function Component

Learn how to properly declare and use functions within React function components to troubleshoot common errors like `handleClick is not defined`.
---
This video is based on the question https://stackoverflow.com/q/68693612/ asked by the user 'Sona Shetty' ( https://stackoverflow.com/u/4385285/ ) and on the answer https://stackoverflow.com/a/68693627/ provided by the user 'Viet' ( https://stackoverflow.com/u/6108390/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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: This keyword in React function component

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Introduction

Are you struggling with the handleClick is not defined error in your React function component? You're not alone! This issue can arise when React developers try to bind functions to event handlers incorrectly. In this post, we will break down the problem and provide a simple solution to get your code back on track.

Understanding the Problem

In your code, you have defined a function called handleClick that you intend to use as an onClick handler for a link component. However, you encounter the error:

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

This error typically indicates that the JavaScript engine does not recognize the handleClick function at the time it is being invoked. This can happen if the function is not defined properly.

The Root Cause

The primary issue here is in the way you're declaring the handleClick function. In JavaScript, you need to use the const, let, or function keywords to declare functions. In your original code, you simply wrote:

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

This attempts to assign handleClick without declaring it, leading to a reference error.

The Solution

To resolve this error, you need to properly declare the handleClick function. Here’s how you can do it:

Step-by-Step Fix

Declare the Function: Use the const keyword to declare the handleClick function. This ensures that it is recognized in the scope of your component.

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

Your Updated Code: After applying the fix, here’s how your VerifyOTP component should look:

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

Conclusion

Now that you’ve properly declared the handleClick function, it should work seamlessly as an event handler when you click the Resend OTP Again link. Remember, always declare your functions using const, let, or function to avoid similar issues in the future.

If you encounter any more React-specific errors or have questions, feel free to reach out! Happy coding!