import type { RectSize } from './types.ts';
/**
 * Returns a rectangle that has same ratio as `target` but fits `area` by size.
 * Works like CSS-rule `object-fit`, by default as `contain`.
 * @param target Target box.
 * @param area Area box.
 * @param strategy Strategy, `contain` or `cover`.
 * @returns New box that fits into area.
 */
export declare function scaleRectToFit(target: RectSize, area: RectSize, strategy?: 'contain' | 'cover'): RectSize;