import type { Action } from 'svelte/action';
/**
 * Parameters of the box selection Svelte action.
 */
export interface BoxSelectionParams {
    /** Is the box selection active. */
    enabled?: boolean;
    /** Selection callback. */
    onselection?: (nodes: Element[]) => void;
    /** Element containing the elements to select. */
    holder?: HTMLElement;
    /** Treshold for elements to be considered inside the box selection. Defaults to 0.9. */
    threshold?: number;
}
/**
 * Action to enable box selection on an element.
 * @param node Element to attach the action to
 * @param params Parameters for the action
 * @returns Svelte action
 */
export declare const boxSelection: Action<HTMLElement, BoxSelectionParams | undefined>;