import { SliderOptions } from './slider.types';
/**
 * Headless slider/range controller. Supports a single thumb or a two-thumb
 * range (inferred from the number of `[data-c42-slider-thumb]` elements),
 * full keyboard control, and pointer dragging. It manages ARIA `slider`
 * semantics and exposes thumb positions as `--c42-slider-start-percent` /
 * `--c42-slider-end-percent` custom properties so CSS can position thumbs and
 * the filled range. It applies no visual styles itself.
 *
 * Markup (single):
 * ```html
 * <div data-c42-slider>
 *   <div data-c42-slider-track>
 *     <div data-c42-slider-range></div>
 *     <div data-c42-slider-thumb></div>
 *   </div>
 * </div>
 * ```
 *
 * Markup (range): add a second thumb with `data-thumb="start"` / `"end"`.
 */
export declare class Slider {
    private readonly root;
    private readonly track;
    private readonly thumbs;
    private readonly isRange;
    private readonly min;
    private readonly max;
    private readonly step;
    private readonly orientation;
    private values;
    private activeThumb;
    private cleanups;
    constructor(root: HTMLElement, options?: SliderOptions);
    private initialValues;
    private init;
    private snap;
    private percent;
    private render;
    private emit;
    private setThumbValue;
    private onKeydown;
    private valueFromPointer;
    private nearestThumb;
    private readonly onPointerMove;
    private readonly onPointerUp;
    private onTrackPointerDown;
    /** Programmatically set the value (single number or `[start, end]`). */
    setValue(value: number | [number, number]): void;
    /** Current value: a number for single, `[start, end]` for range. */
    getValue(): number | [number, number];
    /** Subscribe to a DOM event on the root element. Returns an unsubscribe fn. */
    on<E extends Event = Event>(event: string, handler: (event: E) => void): () => void;
    destroy(): void;
}