handle ajax message if not a blob jquery code example

Example: receive blob over jquery ajax

jQuery.ajax({
            url:'https://images.unsplash.com/photo-1465101108990-e5eac17cf76d?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ%3D%3D&s=471ae675a6140db97fea32b55781479e',
            cache:false,
            xhrFields:{
                responseType: 'blob'
            },
            success: function(data){
                var img = document.getElementById('img');
                var url = window.URL || window.webkitURL;
                img.src = url.createObjectURL(data);
            },
            error:function(){
                
            }
        });