export interface Rect {
  left: number;
  top: number;
  width: number;
  height: number;
}

export function rectsOverlap(a: Rect, b: Rect): boolean {
  return (
    a.left < b.left + b.width &&
    a.left + a.width > b.left &&
    a.top < b.top + b.height &&
    a.top + a.height > b.top
  );
}