老师看下这里

// 页面中有个板块 需要多张图片加载完之后才能进行展示

const loadImg = (src) => {

  return new Promise((resolve, reject) => {

    const img = new Image();

    img.src = src;

    img.onload = void resolve(img);

    img.onerror = void reject("加载失败");

  });

};

const imgs = [

  "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1526734981&di=fe12efe9e3a76bd3bb5ac202a3c76823&imgtype=jpg&er=1&src=http%3A%2F%2Fd15.lxyes.com%2F15xm%2Fact%2F20151105%2F20%2F99112408.jpg",

  "https://ss1.bdstatic.com/70cFvXSh_Q1YnxGkpoWK1HF6hhy/it/u=1252816855,3131381110&fm=27&gp=0.jpg",

  "https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1906477750,651116720&fm=27&gp=0.jpg",

];

Promise.all(imgs.map((src) => loadImg(src))).then((arr) => {

  console.log(arr);

  arr

    .forEach((img) => {

      document.body.appendChild(img);

    })

    .catch((e) => {

      console.log(e);

    });

});