Form (React Router)

Detailed Explanation

Form is a React Router Component that replaces the standard HTML <form> tag. When a user submits a Form, React Router intercepts the submission and routes it to the current route's action Function — no full page reload required.

import { Form } from 'react-router-dom';

<Form method="post">
  <input name="title" required />
  <textarea name="content" />
  <button type="submit">Create Post</button>
</Form>

The key difference from a regular HTML form: a normal form sends data to a Server URL and reloads the page. React Router's Form sends data to your action function on the Frontend, keeping the experience smooth and fast.

Inside the action, you extract the submitted data using request.formData(). Each input's name attribute becomes a key in the form data. The action then validates the data and sends it to your Database (like Supabase).

Form works with useActionData to display errors, and with the useNavigation hook to show submission states like "Posting..." on the button. Together, these create a complete data-writing pattern: Form submits → action processes → useActionData shows results.