promise-ajax封装

封装

function http() {
    return new Promise((resolve, reject) => {
        $.ajax({
            url,
            success: res => {
                resolve(res)
            },
            error: err => {
                reject(err)
            }
        })
    })
}

 <script>
        var url = 'http://47.108.197.28:3000/top/playlist?order=hot'
        http(url).then(res=>{
            var id = res.playlists[0].id
            return id
        }).then(id=>{
            var url = `http://47.108.197.28:3000/top/playlist/detail?id=${id}`
            http(url).then(res=>{
                console.log(res);
            })
        })
  </script>