React Essentials · Forms & Events · Lesson 14 of 26
Handling Form Submission
Concept
Handling Form Submission
onSubmit on a form, combined with event.preventDefault(), lets you control what happens when a form is submitted.
By the end of this lesson
- Explain the core idea behind Handling Form Submission.
- Predict output before running a change.
- Test one realistic and one unusual input.
- Use the result to make the next decision.
How to study this page
- 1. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
ExampleRunnable
function handleSubmit(e) {
e.preventDefault();
console.log("Submitted!");
}Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Handling Form Submission. Then reopen the editor and prove your explanation with a small test.
You are ready to continue when you can predict, test, and explain the result.
Your turn
Build a form with a name field that logs the name on submit.
Loading editor…
Console