Navigation & Inputs · Inputs & Forms
Inline Validation
also known as Real-time validation, Live validation
Inline validation checks a field's input immediately, usually as the user types or leaves it, and shows the result right beside that field. It catches errors early instead of waiting for submission. Success indicators can also reassure users that entries are correct.
See it live — shadcn/ui · MUI · Ant Design
Don't confuse it with
Inline validation gives per-field feedback in real time; broader form validation may only run on submit. Inline validation reacts to what was typed, whereas helper text is fixed guidance shown before any input.
In the wild
A green check appearing next to a username as soon as it's available.