Repopulate form fields after Back button click

PHOTO EMBED

Thu Jun 29 2023 11:49:25 GMT+0000 (Coordinated Universal Time)

Saved by @JISSMONJOSE #react.js #css #javascript 

To populate the form fields of the previous step when the "Back" button is clicked, you can store the form data in the parent component and pass it as props to the child components. Here's an updated example:

UserOnBoardingMain component:

```jsx
import React, { useState } from 'react';
import UserRegistrationForm from './UserRegistrationForm';
import UserRegistrationFormAddressInfo from './UserRegistrationFormAddressInfo';
import UserRegistrationFormCompanyInfo from './UserRegistrationFormCompanyInfo';

const UserOnBoardingMain = () => {
  const [step, setStep] = useState(1);
  const [userData, setUserData] = useState({});

  const handleNextStep = (data) => {
    setUserData((prevData) => ({ ...prevData, ...data }));
    setStep((prevStep) => prevStep + 1);
  };

  const handleBackStep = () => {
    setStep((prevStep) => prevStep - 1);
  };

  return (
    <>
      {step === 1 && (
        <UserRegistrationForm onNextStep={handleNextStep} userData={userData} />
      )}
      {step === 2 && (
        <UserRegistrationFormAddressInfo
          onNextStep={handleNextStep}
          onBackStep={handleBackStep}
          userData={userData}
        />
      )}
      {step === 3 && (
        <UserRegistrationFormCompanyInfo
          onNextStep={handleNextStep}
          onBackStep={handleBackStep}
          userData={userData}
        />
      )}
    </>
  );
};

export default UserOnBoardingMain;
```

UserRegistrationForm component:

```jsx
import React from 'react';
import { useForm } from 'react-hook-form';

const UserRegistrationForm = ({ onNextStep, userData }) => {
  const {
    register,
    handleSubmit,
    formState: { errors },
  } = useForm();

  const onSubmit = (data) => {
    onNextStep(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      {/* Form fields */}
      <input {...register('fieldName')} defaultValue={userData.fieldName} />
      {/* Other form fields */}
      <button type="submit">Next</button>
    </form>
  );
};

export default UserRegistrationForm;
```

UserRegistrationFormAddressInfo and UserRegistrationFormCompanyInfo components would have similar implementations.

In the above code, the `userData` state is updated whenever the `handleNextStep` function is called, which is triggered when the "Next" button is clicked in each form step. The `userData` is then passed as props to the child components. When the "Back" button is clicked, the `handleBackStep` function is called, which reduces the `step` value by 1, allowing you to navigate back to the previous step.

By providing the `defaultValue` prop to each form field in the `UserRegistrationForm` component, the fields will be populated with the corresponding values from the `userData` object. This way, when you navigate back to the previous step, the form fields will be prepopulated with the previously entered values.

Make sure to adjust the form field names and structure according to your specific requirements.
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