Preload array of images with Promise

img.js

export default arr => new Promise((resolve) => {
    const imgs = [];
    arr.forEach((path) => {
        const img = new Image();
        img.onload = () => {
            imgs.push(img);
            if (imgs.length === arr.length) resolve(imgs);
        };
        img.src = `../img/phone/phone_000${path}`;
    });
});