Скачать или смотреть Creating a Custom Input Component in React for Regex Validation

Learn how to build a `Custom Input` component in React that validates input against a regex and returns its value to the parent component.
---
This video is based on the question https://stackoverflow.com/q/65288151/ asked by the user 'qasimmehdi' ( https://stackoverflow.com/u/8967258/ ) and on the answer https://stackoverflow.com/a/65302654/ provided by the user 'qasimmehdi' ( https://stackoverflow.com/u/8967258/ ) 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: How to create an event similar to onChange in React

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.
---
Building a Custom Input Component in React for Regex Validation

When developing web applications using React, there often arises the need for form validation. Specifically, you might need to create an input component that checks if the user input matches certain regex patterns, providing feedback to users in real-time. This guide will guide you through creating a Custom Input component in React that accomplishes just that, similar to an existing input component in React Native.

Understanding the Problem

In a React Native environment, you might have a custom input component that validates user input based on a regex pattern. The component returns a boolean indicating whether the input matches the pattern. However, when transitioning to React for web, you'd like to return the value of the input while also handling validation. This requires a solid understanding of hooks and state management in React.

The Solution

To create a functioning Custom Input component in React, follow the structure outlined below:

Step 1: Setting Up the Component

We'll create a functional component called CustomInput. This component will take props for error messages, input properties, the regex for validation, and a callback function for input changes.

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

Step 2: Using the CustomInput in a Parent Component

Next, you will want to implement this CustomInput within a parent component such as a form. You can handle its state using useState from React, as shown below:

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

Step 3: Testing the Input Component

Now that you have set up your CustomInput, it is crucial to test its functionality. Ensure the input displays an error message when invalid input is entered (i.e., when the regex test fails) and that it correctly returns the input value to the parent component.

Conclusion

Creating reusable components like the Custom Input in React can significantly improve form handling across your application. By incorporating regex validation directly into the component, you enable user-friendly features, such as real-time validation feedback. If you’re careful about managing the state and handling props, your users will appreciate the clarity and responsiveness of your forms.

Is this approach resourceful for your use case? Feel free to experiment with the component and fine-tune it according to your application requirements!