ajax请求数据

$.ajax({
            url:'',
            type:'GET', //GET
            async:true,    //或false,是否异步
            data:{
           
            },
            //后台传输数据
            // dataType:'json',    //返回的数据格式：json/xml/html/script/jsonp/text
            beforeSend:function(xhr){
                console.log(xhr)
                console.log('发送前')
            },
            success:function(data,textStatus,jqXHR){
                console.log(data)
                console.log(textStatus)
                console.log(jqXHR)
                console.log(123456)
            },
            error:function(xhr,textStatus){
                console.log('错误')
                console.log(xhr)
                console.log(textStatus)
            },
            complete:function(){
                console.log('结束')
            }
        })