How do you handle forms and form validation in React?

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Handling forms and form validation in React involves managing form state, capturing user input, and validating data before submission to ensure correctness and usability.

1. Managing Form State:

React uses component state to track form inputs. This is typically done using the useState hook:

Each form field is controlled via state, making it a controlled component.

2. Form Submission:

To handle submission:

3. Validation:

Validation can be done manually or with libraries:

Manual Validation:

You can write custom logic:

Using Libraries:

Libraries like Formik and React Hook Form simplify state management and validation.

• Formik with Yup:

• React Hook Form:

4. Displaying Errors:

Show real-time feedback by conditionally rendering error messages based on validation results.

In summary, React handles forms using component state, event handlers, and optionally, libraries like Formik or React Hook Form for cleaner and more scalable code.

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