案例–使用async函数实现多张图片的依次加载（第一张加载完之后才能加载第二张）
let loadImg = (src) => {
return new Promise((resolve, reject) => {
let img = document.createElement(‘img’)
img.src = src
document.body.append(img)
setTimeout(() => {
resolve(true)
}, 1000)
})
}
const imgs = [’…/src/img/1.PNG’, ‘…/src/img/1.PNG’, ‘…/src/img/1.PNG’];
// 依次加载图片
async function fSync(imgs) {
for (let i of imgs) {
await loadImg(i)
}
}
fSync(imgs);
```
