一、渲染（传递数组）

view —>.html

{{each playlists}}
        <p>
            <a href="/detail?id={{$value.id}}">{{$value.name}}</a>
        </p>
        {{/each}}

http请求
index.js

router.get("/detail", async ctx=>{
    var id=ctx.query.id;
    // console.log(id)
    console.log(ctx.query.id)
    var url="https://music.aityp.com/playlist/detail?id="+id;
    var res=await axios.get(url);
    // console.log(res.data);
    await ctx.render('detail')
})