http.js: ``` class HTTP{ request({url,type="get",dataType}){ return $.ajax({ url, type, dataType }); } } class MovieModel extends HTTP{ getTop250(){ return this.request({ url:"https://douban.uieee.com/v2/movie/top250", dataType:"jsonp" }) } } ``` ***** class.html ``` <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script> <script src="http.js"></script> <script> /* var http = new HTTP(); http.request({ url:"https://douban.uieee.com/v2/movie/top250", dataType:"jsonp" }).then(res=>{ console.log(res); }) */ const movieModel = new MovieModel(); movieModel.getTop250().then(res=>{ console.log(res); }) </script> ```