Скачать или смотреть Resolving the onBlur Event Issue in React.js with react-hook-form

Discover why the `onBlur` event doesn't fire when using `react-hook-form` in your React.js app, and learn how to properly implement it.
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This video is based on the question https://stackoverflow.com/q/77805723/ asked by the user 'Abdisa Tsegaye' ( https://stackoverflow.com/u/12706865/ ) and on the answer https://stackoverflow.com/a/77807230/ provided by the user 'Ahmed Abdelbaset' ( https://stackoverflow.com/u/18079514/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Issue with onBlur Events in React.js and react-hook-form

In the development process of an application using React.js, one commonly encountered problem is the onBlur event not firing as expected when integrating with react-hook-form. Many developers have successfully implemented forms using react-hook-form, but when it comes time to handle input focus changes, they encounter a glitch: the onBlur event simply doesn't trigger. In this guide, we will dive into the details of this issue, why it happens, and how to fix it effectively.

The Problem Explained

When creating forms, we expect the onBlur event—triggered when an input field loses focus—to be a part of our component's behavior. However, when using react-hook-form, which provides a way to manage form states easily, the register function can override essential properties including onBlur. As a result, the callback you provide for onBlur may not be executed as intended. This leads to confusion, especially when the onFocus event works seamlessly.

Here’s a brief look into the scenario:

You have an input field with both onFocus and onBlur events.

The onFocus fires correctly but you find that onBlur does not when the field is registered with react-hook-form.

Initial Input Structure

Here’s the sample input structure that highlights the issue:

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

This setup should normally work, but as many have experienced, the onBlur callback doesn't fire with react-hook-form.

Why Doesn't onBlur Work with react-hook-form?

The register method handles a variety of input properties for you, including value, onChange, and importantly, onBlur. When you apply register to an input, you're effectively giving control to the library, which means that the native onBlur you've defined can be overridden.

Implementing the Solution

To ensure the onBlur event triggers your custom logic while still retaining the benefits of react-hook-form, you need to destructure the onBlur property from the register function. By doing so, you can call it manually within your own onBlur handler. Here’s how you can adapt your code:

Updated Input Component

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

Key Steps to Remember:

Destructure: Extract onBlur from the register function call.

Call the Original: Include the call to the destructured onBlur within your input's onBlur handler.

Conclusion

By understanding how the register function works and how it interacts with event handlers in React.js, you can effectively manage onBlur events while using react-hook-form. This simple adjustment allows you to leverage the form management capabilities of react-hook-form without compromising on your ability to handle user interactions in a custom manner.

Feel free to implement this solution to enhance your forms and ensure that your input events behave as expected. Happy coding!