如下所示:
以下为纯js代码
<Meta charset="UTF-8">
loading
window.onload = () => { var img = document.querySelector('#img'); img.src = 'http://www.86y.org/images/loading.gif'; // 先加载loading.gif var newImg = new Image(); newImg.src = 'https://avatars3.githubusercontent.com/u/1?v=3'; newImg.onerror = () =>
{ // 图片加载错误时的替换图片 newImg.src = 'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1489486509807&di=22213343ba71ad6436b561b5df999ff7&imgtype=0&src=http%3A%2F%2Fa0.att.hudong.com%2F77%2F31%2F20300542906611142174319458811.jpg'; } newImg.onload = () => { // 图片加载成功后把地址给原来的img img.src = newImg.src } }