Set Default Values With React Hook Form Easily

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Working with forms in React can be a daunting task, especially when dealing with complex form data and validation. React Hook Form is a popular library that simplifies the process of managing forms in React applications. One of the key features of React Hook Form is its ability to set default values for form fields. In this article, we will explore how to set default values with React Hook Form easily.

Understanding React Hook Form

Before diving into setting default values, let's quickly understand how React Hook Form works. React Hook Form is a library that provides a simple way to manage forms in React. It uses React Hooks to manage form state and validation. With React Hook Form, you can easily handle form data, validation, and submission.

Setting Default Values

Setting default values with React Hook Form is straightforward. You can set default values for individual form fields or for the entire form. Here's an example of how to set default values for individual form fields:

import { useForm } from 'react-hook-form';

function MyForm() {
  const { register, handleSubmit } = useForm({
    defaultValues: {
      name: 'John Doe',
      email: 'john.doe@example.com',
    },
  });

  const onSubmit = async (data) => {
    console.log(data);
  };

  return (
    

      Name:
      
      

      Email:
      
      

      Submit
    
  );
}

In this example, we're using the useForm hook from React Hook Form to manage our form. We're passing an object with a defaultValues property to the useForm hook. This object contains the default values for our form fields.

Setting Default Values for the Entire Form

You can also set default values for the entire form using the reset method provided by React Hook Form. Here's an example:

import { useForm } from 'react-hook-form';

function MyForm() {
  const { register, handleSubmit, reset } = useForm();

  const onSubmit = async (data) => {
    console.log(data);
  };

  const getDefaultValues = () => {
    return {
      name: 'John Doe',
      email: 'john.doe@example.com',
    };
  };

  const handleReset = () => {
    reset(getDefaultValues());
  };

  return (
    

      Name:
      
      

      Email:
      
      

      Submit
      
        Reset
      
    
  );
}

In this example, we're using the reset method to set the default values for our form when the user clicks the "Reset" button.

Using the useForm Hook with TypeScript

If you're using TypeScript, you can use the useForm hook with type safety. Here's an example:

import { useForm } from 'react-hook-form';

interface MyFormData {
  name: string;
  email: string;
}

function MyForm() {
  const { register, handleSubmit } = useForm({
    defaultValues: {
      name: 'John Doe',
      email: 'john.doe@example.com',
    },
  });

  const onSubmit = async (data: MyFormData) => {
    console.log(data);
  };

  return (
    

      Name:
      
      

      Email:
      
      

      Submit
    
  );
}

In this example, we're using the useForm hook with a type parameter MyFormData. This allows us to use type safety when working with our form data.

Conclusion

Setting default values with React Hook Form is a straightforward process. You can set default values for individual form fields or for the entire form using the defaultValues property or the reset method. By using React Hook Form, you can simplify the process of managing forms in your React applications.

Frequently Asked Questions

I hope this article has helped you understand how to set default values with React Hook Form. If you have any questions or need further assistance, feel free to ask!