Question Types

19 question types are supported, forming one canonical set shared across all platforms:

Type	Notes
`MULTIPLE_CHOICE_SINGLE`	Renders as radio buttons, or a dropdown when `config.display === 'dropdown'` — there is no separate `DROPDOWN` type.
`MULTIPLE_CHOICE_MULTI`	Renders as checkboxes; any subset of `options` can be selected.
`TEXT_SHORT`	Single-line input with a live character counter; `config.maxLength` defaults to 250.
`TEXT_LONG`	Multi-line textarea with a live character counter; `config.maxLength` defaults to 5000.
`NPS`	Fixed 0–10 scale (not configurable); labels from `config.minLabel`/`config.maxLabel`, defaulting to “Not likely”/“Very likely”.
`RATING_STAR`	Star rating sized by `config.max` (default 5); no `config.min`.
`RATING_SCALE`	Numeric button scale over `config.min`–`config.max` (default 1–5), with optional `config.minLabel`/`config.maxLabel`.
`NUMBER_INPUT`	Numeric input; `config.min`/`config.max`/`config.step` set native constraints and are re-validated on submit.
`BINARY`	Yes/No toggle; uses `question.options` if provided, else `config.trueLabel`/`config.falseLabel` (default “Yes”/“No”).
`SLIDER`	Slider over `config.min`–`config.max` (default 0–100), stepped by `config.step` (default 1); starts at the midpoint but reports `null` until touched.
`IMAGE_SELECTION`	Single-select image grid; each option supplies `imageUrl` alongside its label.
`RANKING`	Drag/keyboard-reorderable list; the answer is the resulting option-ID order, not a selection.
`CONTINUOUS_SUM`	Numeric allocation across options that must sum to `config.targetSum` (default 100); blocks advancement until the total matches exactly.
`MATRIX_CHOICE_SINGLE`	Matrix; empty column list if `config.columns` is missing (no numeric fallback).
`MATRIX_CHOICE_MULTI`	Matrix of checkboxes (multiple selections per row); same column-resolution rule as `MATRIX_CHOICE_SINGLE`.
`MATRIX_RATING_SCALE`	Derives numeric columns from `config.min`/`config.max` when `config.columns` is absent.
`MATRIX_STAR_RATING`	Derives numeric columns from `config.max` when `config.columns` is absent.
`EMAIL_INPUT`	Validated against `config.validation.pattern`/`messageKey` if supplied, else a built-in fallback regex.
`DATE_TIME`	Native date/time picker; input type (`date`/`time`/`datetime-local`) chosen by `config.dateMode`, defaulting to `'both'`.

Randomization

config.randomizeOptions shuffles the option list, but only for MULTIPLE_CHOICE_SINGLE, MULTIPLE_CHOICE_MULTI, IMAGE_SELECTION, and RANKING. It has no effect on matrix types, which use rows/columns rather than an options list to shuffle, and is explicitly excluded for CONTINUOUS_SUM to preserve author-defined category order — for both, the flag is a no-op regardless of its value.