- Success Criterion 3.2.2
- Conformance level A
3.2.2 · On Input
Lesson overview · On Input
In plain language
Changing a field's value (typing, selecting, checking) must not unexpectedly navigate or submit.
Who it affects
Keyboard and screen-reader users, and people who need predictable form behavior.
How to check
Change dropdowns, radios, checkboxes without pressing a button: the page must not jump elsewhere or submit unless it warned you first.
Common misconception
A dropdown that navigates on selection (a “jump menu”) is a classic, well-intentioned convenience feature that actually breaks this rule, since changing a value shouldn't trigger navigation without warning.
Learn more
Scenarios in this lesson
- Form That Submits Itself the Moment the Last Field Is Filled
- Selecting an Option That Opens a New Window With No Warning
- Dropdown That Navigates to a New Page on Selection
- Checking a Box That Reloads the Page and Loses Entries
- Country Selector That Re-Renders the Form and Drops Focus
- Search Box That Auto-Navigates Once Enough Characters Are Typed
- Radio Selection That Auto-Advances a Multi-Step Wizard
- Toggle Switch That Immediately Saves and Redirects the User
- File Selection That Auto-Submits the Form With No Warning
- Input Event That Unexpectedly Spawns a Popup Window
- Control Inside a Dialog That Accidentally Closes the Whole Dialog