想拿一张文件服务器上的图片作为背景图，链接比如:https://www.xxx-xxx.com:/oss/xxxx-5bbc/nav(1).jpg 直接插入dom节点中 [style.backgroundImage]="background

const array = [1,2,3,4,5] const arr = await Promise.all( array.map(async ele => { // asyncHandl