2020 में रिएक्ट फॉर्म बनाना

अच्छे फॉर्म के नियमों को याद रखें

राज्य हुक का उपयोग करते हुए प्रसंस्करण प्रपत्र

function LoginForm() {
  const [email, setEmail] = React.useState('');
  const [password, setPassword] = React.useState('');

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    api.login(email, password);
  };
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <label htmlFor='email'>Email</label>
        <input type='email' id='email' value={email} onChange={(e) => setEmail(e.target.value)} />
      </div>
      <div>
        <label htmlFor='password'>Password</label>
        <input type='password' id='password' value={password} onChange={(e) => setPassword(e.target.value)} />
      </div>
    </form>
  );
}

एक कस्टम हुक बनाना

const useFormField = (initialValue: string = '') => {
  const [value, setValue] = React.useState(initialValue);
  const onChange = React.useCallback((e: React.ChangeEvent<HTMLInputElement>) => setValue(e.target.value), []);
  return { value, onChange };
};

export function LoginForm() {
  const emailField = useFormField();
  const passwordField = useFormField();

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    api.login(emailField.value, passwordField.value);
  };
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <label htmlFor='email'>Email</label>
        <input type='email' id='email' {...emailField} />
      </div>
      <div>
        <label htmlFor='password'>Password</label>
        <input type='password' id='password' {...passwordField} />
      </div>
    </form>
  );
}

बड़ी संख्या में खेतों का प्रसंस्करण

export function LoginForm() {
  const { formFields, createChangeHandler } = useFormFields({
    email: '',
    password: '',
  });

  const handleSubmit = (e: React.FormEvent) => {
    e.preventDefault();
    api.login(formFields.email, formFields.password);
  };
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <label htmlFor='email'>Email</label>
        <input type='email' id='email' value={formFields.email} onChange={createChangeHandler('email')} />
      </div>
      <div>
        <label htmlFor='password'>Password</label>
        <input type='password' id='password' value={formFields.password} onChange={createChangeHandler('password')} />
      </div>
    </form>
  );
}

वैकल्पिक दृष्टिकोण

export function LoginForm() {
  const handleSubmit = (e: React.FormEvent) => {
	e.preventDefault();
	const formData = new FormData(e.target as HTMLFormElement);
	api.login(formData.get('email'), formData.get('password'));
  };
  return (
	<form onSubmit={handleSubmit}>
  	<div>
    	<label htmlFor="email">Email</label>
    	<input
      	type="email"
      	id="email"
      	name="email"
    	/>
  	</div>
  	<div>
    	<label htmlFor="password">Password</label>
    	<input
      	type="password"
      	id="password"
      	name="password"
    	/>
  	</div>
  	<button>Log in</button>
	</form>
  );
}

प्रत्येक दृष्टिकोण का उपयोग कब करें