class4.md

Code 301 Reading Notes

Class 04

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React and Forms

letting the browser handle the state:

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>
  );
}

// Not a single Hook in sight, no setting the value, and no change listeners either. 





// https://blog.logrocket.com/forms-in-react-in-2020/

• FormData built-in browser API FormData is a handy (and well supported) way to get the field values from our input fields!
• We get a reference to the form DOM element via the submit event’s target attribute and create a new instance of the FormData class. Now, we can get all fields by their name attribute by calling formData.get(‘name-of-input-field’).
• This way, you never really need to handle the state explicitly. If you want default values (like if you’re populating initial field values from a database or local storage), React even provides you with a handy <span class="pln">defaultValue</span> prop to get that done as well!

React Docs - Forms

React Bootstrap - Forms

Reading

• React Docs - Forms

Bookmark/Skim

• React Bootstrap - Forms

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