Transform the raw text into the adapted value.
Called on every input event. The result is stored in the value model
and written back to the native input element, so the user sees the
adapted text. The original keystrokes are preserved in the text model.
Raw text from the input element.
Adapted value string (displayed in the field and emitted via value).
Validate the raw text and return a result indicating whether the current input is valid.
When present, UIInput exposes a valid signal and applies the
invalid host class when validation fails.
Validation result with valid flag and error messages.
Adapter that converts all input text to uppercase.
Useful for fields that require uppercase values (e.g. VIN numbers, licence plates, IATA codes).
Example