/**
 * Option selection-state classifier for the browser auto-answer loop.
 *
 * Native inputs expose `checked`, but quiz/form widgets that render options as
 * <button>/<div>/<li> usually mark the chosen option with an aria state, a
 * `selected`/`checked`/`active` class token, or a data attribute. The loop must
 * recognise all of these, otherwise:
 *   - a successful click looks like "no effect" and the DOM-click fallback
 *     fires, toggling the choice back off, and
 *   - `hasUnansweredQuestions` never sees the group as answered, so the model is
 *     re-prompted and re-clicks the same option forever.
 *
 * Kept dependency-free so the SAME function can be serialized into the page-side
 * `extractElements` script via `toString()` and unit-tested in Node.
 */
export interface OptionStateSignals {
    /** Native `input.checked` (radio/checkbox). */
    checked?: boolean;
    ariaChecked?: string | null;
    ariaSelected?: string | null;
    ariaPressed?: string | null;
    /** Raw `class` string (option widgets often use `selected`/`active`). */
    className?: string | null;
    dataSelected?: string | null;
    dataChecked?: string | null;
    dataCorrect?: string | null;
    /** A label/button wrapping a checked input. */
    descendantChecked?: boolean;
}
/**
 * True when an interactive option is currently selected, from any of the
 * signals real widgets use. Deliberately does NOT match `inactive`/`interactive`
 * (the class token must be delimited).
 */
export declare function classifyOptionSelected(signals: OptionStateSignals): boolean;