how to design a form in react js using material ui code example

Example 1: Simple form based react material ui

import React from 'react'
import { Field, reduxForm } from 'redux-form'
import TextField from '@material-ui/core/TextField'
import Checkbox from '@material-ui/core/Checkbox'
import FormControlLabel from '@material-ui/core/FormControlLabel'
import FormControl from '@material-ui/core/FormControl'
import Select from '@material-ui/core/Select'
import InputLabel from '@material-ui/core/InputLabel'
import FormHelperText from '@material-ui/core/FormHelperText'
import Radio from '@material-ui/core/Radio'
import RadioGroup from '@material-ui/core/RadioGroup'
import asyncValidate from './asyncValidate'

const validate = values => {
  const errors = {}
  const requiredFields = [
    'firstName',
    'lastName',
    'email',
    'favoriteColor',
    'notes'
  ]
  requiredFields.forEach(field => {
    if (!values[field]) {
      errors[field] = 'Required'
    }
  })
  if (
    values.email &&
    !/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(values.email)
  ) {
    errors.email = 'Invalid email address'
  }
  return errors
}

const renderTextField = ({
  label,
  input,
  meta: { touched, invalid, error },
  ...custom
}) => (
  <TextField
    label={label}
    placeholder={label}
    error={touched && invalid}
    helperText={touched && error}
    {...input}
    {...custom}
  />
)

const renderCheckbox = ({ input, label }) => (
  <div>
    <FormControlLabel
      control={
        <Checkbox
          checked={input.value ? true : false}
          onChange={input.onChange}
        />
      }
      label={label}
    />
  </div>
)

const radioButton = ({ input, ...rest }) => (
  <FormControl>
    <RadioGroup {...input} {...rest}>
      <FormControlLabel value="female" control={<Radio />} label="Female" />
      <FormControlLabel value="male" control={<Radio />} label="Male" />
      <FormControlLabel value="other" control={<Radio />} label="Other" />
    </RadioGroup>
  </FormControl>
)

const renderFromHelper = ({ touched, error }) => {
  if (!(touched && error)) {
    return
  } else {
    return <FormHelperText>{touched && error}</FormHelperText>
  }
}

const renderSelectField = ({
  input,
  label,
  meta: { touched, error },
  children,
  ...custom
}) => (
  <FormControl error={touched && error}>
    <InputLabel htmlFor="age-native-simple">Age</InputLabel>
    <Select
      native
      {...input}
      {...custom}
      inputProps={{
        name: 'age',
        id: 'age-native-simple'
      }}
    >
      {children}
    </Select>
    {renderFromHelper({ touched, error })}
  </FormControl>
)

const MaterialUiForm = props => {
  const { handleSubmit, pristine, reset, submitting, classes } = props
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <Field
          name="firstName"
          component={renderTextField}
          label="First Name"
        />
      </div>
      <div>
        <Field name="lastName" component={renderTextField} label="Last Name" />
      </div>
      <div>
        <Field name="email" component={renderTextField} label="Email" />
      </div>
      <div>
        <Field name="sex" component={radioButton}>
          <Radio value="male" label="male" />
          <Radio value="female" label="female" />
        </Field>
      </div>
      <div>
        <Field
          classes={classes}
          name="favoriteColor"
          component={renderSelectField}
          label="Favorite Color"
        >
          <option value="" />
          <option value={'ff0000'}>Red</option>
          <option value={'00ff00'}>Green</option>
          <option value={'0000ff'}>Blue</option>
        </Field>
      </div>
      <div>
        <Field name="employed" component={renderCheckbox} label="Employed" />
      </div>
      <div />
      <div>
        <Field
          name="notes"
          component={renderTextField}
          label="Notes"
          multiline
          rowsMax="4"
          margin="normal"
        />
      </div>
      <div>
        <button type="submit" disabled={pristine || submitting}>
          Submit
        </button>
        <button type="button" disabled={pristine || submitting} onClick={reset}>
          Clear Values
        </button>
      </div>
    </form>
  )
}

export default reduxForm({
  form: 'MaterialUiForm', // a unique identifier for this form
  validate,
  asyncValidate
})(MaterialUiForm)

Example 2: Simple form based react material ui

const sleep = ms => new Promise(resolve => setTimeout(resolve, ms))

const asyncValidate = (values /*, dispatch */) => {
  return sleep(1000).then(() => {
    // simulate server latency
    if (['[email protected]', '[email protected]'].includes(values.email)) {
      // eslint-disable-next-line no-throw-literal
      throw { email: 'Email already Exists' }
    }
  })
}

export default asyncValidate