Vladimir185

const d = [...new Set(b.map(({ carsIds }) => carsIds).flat())];
            const e = d.map((carId) => {
                const ids = b
                    .filter(({ carsIds }) => carsIds.includes(carId))
                    .map(({ id }) => id);
                return {
                    carId,
                    ids
                };
            });

addImagesToPreview() {
      this.previewImgs = this.car.carImgs.map((previewImg) => ({
        link: URL.createObjectURL(previewImg),
        name: previewImg.name,
      }));
    },
    dragChange() {
      const previewImgsLinks = this.previewImgs.map(({ name }) => name);
      this.car.carImgs = this.car.carImgs.sort(
        (a, b) =>
          previewImgsLinks.indexOf(a.name) - previewImgsLinks.indexOf(b.name)
      );
    },