jsonp:

1、axios不支持jsonp,但是有插件，试了不好用
2、vue-resource支持jsonp,试了（）
3、自己写的用jquery ajax封装的jsonp

vue版

let prod_url = '//bbbb'; // prod
let dev_mock_url = '//eeee'; // dev
let url = window.location.hostname !== 'localhost' ? prod_url : dev_mock_url;

export const fetchData = function (options, ifonline) {
    let _url = ifonline ? prod_url : url;

    return new Promise((resolve, reject) => {

        let config = $.extend({
            url: '',
            type: 'GET',
            data: {}
        }, options);
        config.url = _url + config.url;

        if (config.cors) {
            config.xhrFields = {withCredentials: true};
        } else if (config.jsonp) {
            config.dataType = 'jsonp';
            config.data = {
                data: JSON.stringify(config.data)
            }
            typeof config.jsonp === 'boolean' && delete config.jsonp;
        }

        $.ajax(config)
            .done(function (data) {
                if (data.responseCode === '00000') {
                    resolve(data)
                } else {
                    reject(data)
                }
            })
            .fail(function (err) {
                reject({responseData: '网络错误, 请稍后重试'});
            });
    })
};

export const fetchData_old = function (options) {
    let _url = url;

    let config = $.extend({
        url: '',
        type: 'GET',
        data: {}
    }, options);

    config.url = _url + config.url;

    if (config.cors) {
        config.xhrFields = {
            withCredentials: true
        }
    } else if (config.jsonp) {
        config.dataType = 'jsonp';
        config.data = {
            data: JSON.stringify(config.data)
        }
        if (typeof config.jsonp === 'boolean') {
            delete config.jsonp;
        }
    }
    return $.ajax(config)
};

jquery版

;
(function(global) {

    var prod_url = '//ft.jdpay.com/hapi/'; // prod
    var dev_mock_url = '//mock.jdfmgt.com/mock/58f038b9d3bb8c02798eda1d/'; // dev
    global.__url = window.location.hostname!=='localhost'? prod_url : dev_mock_url;

    global.fetchData = function(options, ifonline) {
        var self = this,
        dtd = $.Deferred(),
        _url = ifonline ? prod_url : __url;
    var config = $.extend({
      url: '',
      type: 'GET',
      data: {}
    }, options);
        config.url = _url + config.url;

        if (config.cors) {
            config.xhrFields = { withCredentials: true };
        }else if (config.jsonp) {
            config.dataType = 'jsonp';
            config.data = {
                data: JSON.stringify(config.data)
            }
            typeof config.jsonp === 'boolean' && delete config.jsonp;
        }

    $.ajax(config)
      .done(function(data){
        if(data.responseCode === '00000') {
          dtd.resolve(data);
        } else if(data.responseCode === 'JRO3030005'){
            // 未开通企业金库
                    if(window.location.pathname !== '/accountop/active.html'){
                        window.location.href = './active.html';
                    }
        } else {
          dtd.reject(data);
        }
      })
      .fail(function(err) {
        dtd.reject({ responseData: '网络错误, 请稍后重试' });
      });

        return dtd.promise();
    }
    global.fetchData_old = function(options) {
        var self = this;
        var _url = __url;

        var config = $.extend({
            url: '',
            type: 'GET',
            data: {}
        }, options);

        config.url = _url + config.url;

        if (config.cors) {
            config.xhrFields = {
                withCredentials: true
            }
        } else if (config.jsonp) {
            config.dataType = 'jsonp';
            config.data = {
                data: JSON.stringify(config.data)
            }
            if (typeof config.jsonp === 'boolean') {
                delete config.jsonp;
            }
        }
        return $.ajax(config)
    }

})(typeof window !== 'undefined' ? window : this);