map方法整理数据，接口返回值进行处理

整理前：

//map方法使thumb加上域名 -->
var data =[
    {
        id: "11", 
        title: "新车小程序title1",
        thumb: "/Public/Uploads/Picture/images/2020/04/762142626738116469589494467455.jpg",
    },
    {
        id: "12", 
        title: "新车小程序title2",
        thumb: "/Public/Uploads/Picture/images/2020/04/226186575376145816491471666188.png",
    }
];
var banners = data.filter(item=>{
    item.thumb = 'https://mall.faw-vw.com'+item.thumb;
    return item
})

处理后值：