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Next.js 15 Fullstack Web Apps · Lesson

Controlled Components and State

Manage form input values using React's controlled component pattern for predictable behavior.

Forms: User Interaction Hub

Forms are essential for almost any web application! They allow users to input information, make choices, and interact with your app.

Think about login screens, search bars, feedback forms, or even shopping cart quantity selectors – all rely on forms.

Uncontrolled Inputs: A Quick Look

In plain HTML, input elements manage their own state. When you type into an <input>, its value updates internally.

In React, these are called uncontrolled components. While simple for static forms, they can be tricky to integrate with React's dynamic UI updates and state management.

All lessons in this course

  1. Controlled Components and State
  2. Form Validation with React Hook Form
  3. Fullstack Forms with Server Actions
  4. File Uploads and Multipart Form Handling
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