Error Messages & Touched/Dirty States (Vanilla)
Show errors only when fields are interacted with (touched) or changed (dirty); improve UX with clear, timely feedback.
Why touched & dirty?
Goal: Show validation messages at the right time using touched (visited) and dirty (changed) markers.
Definitions
Touched: user focused then blurred a field. Dirty: field value differs from its initial value. Use them to time error display.
All lessons in this course
- Controlled Forms with Multiple Inputs
- Basic Validation Patterns & Submit Handling
- Error Messages & Touched/Dirty States (Vanilla)