jQueryのajaxリクエストhtmlファイル

var mainUrl = ‘./aaa.html'
$.ajax({
        type: 'GET',       //        POST GET
        url: mainUrl,      //     //   mainUrl     
        dataType: "html",  //"xml", "html", "script", "json", "jsonp", "text".
        beforeSend: function () {
            requesting();//         
        },
        //           
        success: function (response) {
            // console.log(response)
            $("#main").html(" ");
            $("#main").html(response);//     response   
 dom   
        },
        //         
        error: function (error) {
            console.log("error");//      
            notfound();
        }
    });