Ajax封装

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(function ($) {

    //1.得到$.ajax的对象

    var _ajax = $.ajax;

    $.ajax = function (options) {

        //2.每次调用发送ajax请求的时候定义默认的error处理方法

        var fn = {

            error: function (XMLHttpRequest, textStatus, errorThrown) {

                toastr.error(XMLHttpRequest.responseText, '错误消息', { closeButton: true, timeOut: 0, positionClass: 'toast-top-full-width' });

            },

            success: function (data, textStatus) { },

            beforeSend: function (XHR) { },

            complete: function (XHR, TS) { }

        }

        //3.如果在调用的时候写了error的处理方法，就不用默认的

        if (options.error) {

            fn.error = options.error;

        }

        if (options.success) {

            fn.success = options.success;

        }

        if (options.beforeSend) {

            fn.beforeSend = options.beforeSend;

        }

        if (options.complete) {

            fn.complete = options.complete;

        }

        //4.扩展原生的$.ajax方法，返回最新的参数

        var _options = $.extend(options, {

            error: function (XMLHttpRequest, textStatus, errorThrown) {

                fn.error(XMLHttpRequest, textStatus, errorThrown);

            },

            success: function (data, textStatus) {

                fn.success(data, textStatus);

            },

            beforeSend: function (XHR) {

                fn.beforeSend(XHR);

            },

            complete: function (XHR, TS) {

                fn.complete(XHR, TS);

            }

        });

        //5.将最新的参数传回ajax对象

        _ajax(_options);

    };

})(jQuery);