回调地狱

        <div id="app"></div>
    <h2>列表数据</h2>
    <p class="dp"></p>
    <audio src="" controls></audio>
    <script>
        /* 回调地狱 */
        /* 1.华语中的第一条数据 */
        var url ='http://192.168.4.18:3000/top/playlist/?cat=华语';
        $.ajax({
            url,
            success:res=>{
                var {name,id} = res.playlists[0]
                $("#app").html(name)
                /* 2.列表页的数据 */
                var listUrl = `http://192.168.4.18:3000/playlist/detail?id=${id}`;
                $.ajax({
                    url:listUrl,
                    success:res=>{
                        var {name,id} = res.playlist.tracks[0]
                        $(".dp").html(name)
                        console.log(id)
                        /* 3.根据id获取音乐播放的url链接 */
                        var musicUrl = `http://192.168.4.18:3000/song/url?id=${id}`
                        $.ajax({
                            url:musicUrl,
                            success:res=>{
                                let src = res.data[0].url;
                                $("audio").attr("src",src)
                            }
                        })
                    }
                })
            }
        })
    </script>