Controlled Forms with Multiple Inputs
Build a form with multiple controlled inputs; store each value in state and handle submit in React.
Controlled Forms with Multiple Inputs is a free React Academy lesson on CoddyKit — lesson 1 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the React Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Intro
Goal: Build a form with multiple controlled inputs. Each input gets its value from state and updates via onChange.
Controlled reminder
A controlled input's value is tied to React state. Every change is handled by onChange and updates the state.
Demo: controlled form
Each input uses value + onChange; state tracks both fields. Submit is handled in React.
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Benefits
Benefits of controlled forms:
- React state is the single source of truth
- Easy validation
- Predictable UI
Validation basics
Validation can run on submit or on each change. Controlled inputs let you check values instantly and show error messages.
Tips
Tips:
- Always bind value to state
- Use one handler for many inputs with name
- Prevent default form submit reload
Controlled form check
Recap
Recap: Controlled forms bind each input to React state. Handle changes with onChange and keep React as the single source of truth.
Frequently asked questions
Is the “Controlled Forms with Multiple Inputs” lesson free?
Yes — the full text of “Controlled Forms with Multiple Inputs” is free to read here on the web, and the React Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the React Academy course, upgrade to CoddyKit PRO.
What will I learn in “Controlled Forms with Multiple Inputs”?
Build a form with multiple controlled inputs; store each value in state and handle submit in React. You practise React Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start React Academy?
No prior experience is required. React Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “Controlled Forms with Multiple Inputs” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this React Academy lesson?
Yes. Every React Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Controlled Forms with Multiple Inputs
- Basic Validation Patterns & Submit Handling
- Error Messages & Touched/Dirty States (Vanilla)