ajax 跨域错误问题

$.ajax({
                url: formUrl,
                type: 'post',
                dateType: 'json',
                data: postData,
                headers: {
                    "Content-Type": "application/x-www-form-urlencoded;charset=utf-8"
                },
                xhrFields: {
                    withCredentials: true
                },
                success: function(data) {
                    data = JSON.parse(data);
                    console.log('res=>', data);
                    if (data.code == 1) {
                        alert(data.message);
                    }
                    if (data.code == 200) {
                        sessionStorage.userInfo = JSON.stringify(data.data);
                        window.location.href = './list.html';
                    }
                    changeCode();
                },
                error: function() {
                    console.log('err');
                },
            });