Forms in React

The Forms chapter teaches you to collect and check user input in React with controlled components and TypeScript.

What each lesson covers:

• Form Handling: Controlled components, text, textarea, select, checkbox, radio and special inputs, handling input, many inputs with one handler, form state, submitting and resetting a form.
• Form Validation: Required fields, email and password checks, custom rules, validating on submit or in real time, and writing clear error messages.

You build working forms step by step, then add validation so users see helpful messages before bad data reaches your app.

Every page runs real React in your browser. Edit the code and see the result next to it. Each lesson ends with exercises that check what your app shows, not how your code is written.

Lessons in this section

1. Form Handling

   Controlled components, text, textarea, select, checkbox, radio and special inputs, handling input, many inputs with one handler, form state, submission and resetting.

2. Form Validation

   Required fields, email and password checks, custom rules, validating on submit or in real time, and writing clear error messages.