//判定是否为空
    isNull =(value)=> {
        return typeof value == 'undefined' || value == "" || value == null || value == undefined|| value == "null";
    };

  //获取当前日期时间
    current = (str) => {
        var _d = new Date();
        var _s = _d.getFullYear() + '-' + (_d.getMonth() + 1) + '-' + _d.getDate();
        if (str) {
            _s += ' ' + _d.getHours() + ':' + _d.getMinutes() + ':' + _d.getSeconds();
        }
        return _s;
    };

//获取当前设备的逻辑宽度和高度
  const viewport = {
        width: $(window).width(),
        height: $(window).height()
    };

    //获取当前页面的名称
    getPageName = () => {
        var href = window.location.href;
        var index = href.indexOf('?');
        if (index > 0) {
            href = href.substr(0, index);
        }
        index = href.lastIndexOf('\/');
        if (index > 0) {
            href = href.substr(index + 1);
        }
        ret

//设置本地缓存
   setLocalStorage =(key, value, isJson) => {
        if (window.localStorage) {
            if (isJson) {
                value = JSON.stringify(value);
            }
            window.localStorage[key] = value;
        } else {
            e.log("当前浏览器不支持localStorage");
        }
    };

    //获取本地缓存
    getLocalStorage =(key, isJson) => {
        if (window.localStorage) {
            var value = window.localStorage[key] || "";
            if (isJson && value) {
                value = JSON.parse(value);
            }
            return value;
        } else {
            e.log("当前浏览器不支持localStorage");
        }
    };
    //清除本地缓存removelocalStorage
    removelocalStorage =(key)=> {
        if (window.localStorage) {
            window.localStorage.removeItem(key);
        }
    };

    //设置运行时缓存setSessionStorage
    setSessionStorage =(key, content)=> {
        if (window.sessionStorage) {
            window.sessionStorage[key] = content;
        } else {
            e.log('您的浏览器不支持setSessionStorage方法');
        }
    };

    //获取运行时缓存getSessionStorage
    getSessionStorage =(key)=> {
        if (window.sessionStorage) {
            return window.sessionStorage[key] || '';
        } else {
            e.log('您的浏览器不支持getSessionStorage方法');
        }
    };

    //清除运行时缓存removeSessionStorage
    removeSessionStorage =(key) =>{
        if (window.sessionStorage) {
            window.sessionStorage.removeItem(key);
        }
    };

    //获取某个cookie
    getCookie =(cookie_name, decode)=> {
        //2016-11-22 suncao 修改ACCESS_TOKEN从localStorage中获取
        if ('ACCESS_TOKEN' == cookie_name) {
            return e.getLocalStorage('ACCESS_TOKEN');
        }
        decode = decode || true;
        var allcookies = document.cookie;
        var cookie_pos = allcookies.indexOf(cookie_name);
        var value = '';
        if (cookie_pos > -1) {
            cookie_pos += cookie_name.length + 1;
            var cookie_end = allcookies.indexOf(";", cookie_pos);
            if (cookie_end == -1) {
                cookie_end = allcookies.length;
            }
            value = allcookies.substring(cookie_pos, cookie_end);
            if (decode) {
                try {
                    value = decodeURIComponent(value);
                } catch (e) {
                    console.log(e);
                    return "";
                }
            }
        }
        return value;
    };

    //设置某个cookie
    setCookie =(cookie_name, cookie_value, domain, isencode, expTime)=> {
        var exp = new Date();
        var expires = "";
        if (expTime) {
            exp.setTime(exp.getTime() + expTime);
            expires = ";expires=" + exp.toGMTString();
        }
        if (!domain) {
            domain = document.domain;
            if (/^[a-z]/i.test(document.domain)) {
                domain = document.domain.substring(document.domain.indexOf("."));
            }
        }

        isencode = typeof isencode == 'undefined' ? true : isencode;
        if (isencode) {
            cookie_value = encodeURIComponent(cookie_value);
        }
        // 2016-11-22 suncao 修改ACCESS_TOKEN 存储为localStorage形式，避免应用退出用户丢失，重新登录问题。
        if ('ACCESS_TOKEN' == cookie_name) {
            e.setLocalStorage('ACCESS_TOKEN', cookie_value);
            document.cookie = cookie_name + "=" + cookie_value + "; path=/; domain=" + domain + ";" + expires;
        } else {
            document.cookie = cookie_name + "=" + cookie_value + "; path=/; domain=" + domain + ";" + expires;
        }
    };

/**
     *得到地址栏参数
     *@param names 参数名称
     *@param urls 从指定的urls获取参数
     *@param cn 是否中文
     *@returns string
     **/
    getQueryString =(names, urls, cn)=> {
        if (urls) {
            if (urls.indexOf('?') > -1) {
                urls = urls.substring(urls.indexOf('?') + 1);
            } else {
                return '';
            }
        } else {
            urls = window.location.search.substr(1);
        }

        var reg = new RegExp("(^|&)" + names + "=([^&]*)(&|$)", "i");
        var r = urls.match(reg);
        if (r && r[2]) {
            var ms = r[2].match(/(\<)|(\>)|(%3C)|(%3E)/g);
            if (ms && ms.length >= 4) {
                //如果检测到有2对及以上开始和结束尖括号
                r[2] = r[2].replace(/(\<)|(%3C)/g, '');
            }
            if (cn) {
                return r[2];
            }
            return unescape(r[2]);
        }
        return '';
    };
    

//获取当前运行平台
    function getPlatform (){
        var platforms = {
            amazon_fireos: /cordova-amazon-fireos/,
            android: /Android/,
            ios: /(iPad)|(iPhone)|(iPod)/,
            blackberry10: /(BB10)/,
            blackberry: /(PlayBook)|(BlackBerry)/,
            windows8: /MSAppHost/,
            windowsphone: /Windows Phone/
        };
        
        for (var key in platforms) {
            if (platforms[key].exec(navigator.userAgent)) {
                return key;
            }
        }
        return "";
    };

 //是否在Android壳子中运行
    isAndroidApp =()=> {
        var result = false;
        if (window.javaBridgeInterface && window.javaBridgeInterface.getClientOS("android").toLocaleLowerCase() === 'android') {
            e.log('当前运行环境是在Android壳子中运行');
            result = true;
        }
        
        //如果判断失败，再次判断所属平台
        if (!result) 
        {
            if(getPlatform() == "android" && isApp())
            {
                result = true;
            }else
            {
                result = false;
            }
        }
        return result;
    }();

//是否在iPhone壳子中运行
   isiPhoneApp =()=> {
        var result = e.getCookie('isiPhoneApp', false) || "false";
        if (result != "true") {
            if (typeof(getClientOS) == 'function' && getClientOS().toLocaleLowerCase() == 'ios') {
                result = "true";
                e.log('当前运行环境是在iOS壳子中运行');
            } else if (window.navigator.userAgent.indexOf(",cpic_zt_ios") > -1) {
                //2015-10-21 目前已通过userAgent解决此问题，考虑到用户不会选择更新的问题此代码开放最少等到最新版ios上线appstore1个月后
                result = "true";
            } else {
                result = (e.getQueryString("e") == "1").toString(); //1==ios
            }
        }
        
        //如果判断失败，再次判断所属平台
        if (result != "true") 
        {
            if(getPlatform() == "ios" && isApp())
            {
                result = "true";
            }else
            {
                result = "false";
            }
        }
        
        //写入cookie
        e.setCookie('isiPhoneApp', result, getDomain());
        return result == "true" ? true : false;
    }();

    //当前是否在壳子中运行
    isRunByApp =()=》 {
        return isAndroidApp() || e.isiPhoneApp();
    }();

/**
     * 是否运行在APP中
     */
    function isApp()
    {
        var result = true;
        
        var userAgent = window.navigator.userAgent;
        
        //浏览器
        if(userAgent.indexOf('Safari') >= 0)
        {
            result = false;
        }
        
        if(result)
        {
            //微信
            if(userAgent.indexOf('MicroMessenger') >= 0)
            {
                result = false;
            }
        }
        
        if(result)
        {
            //QQ
            if(userAgent.indexOf('QQ') >= 0)
            {
                result = false;
            }
        }
        
        if(result)
        {
            //支付宝
            if(userAgent.indexOf('AliApp') >= 0)
            {
                result = false;
            }
        }
        
        if(result)
        {
            //微博
            if(ua.indexOf("Weibo") >= 0 && ua.indexOf("_weibo_") >= 0)
            {
                result = false;
            }
        }
        
        return result;
    }

/**
     * 毫秒值转具体时间
     * @param {Object} date
     */
    formatDateTime = (date)=> {  
        var y = date.getFullYear();  
        var m = date.getMonth() + 1;  
        m = m < 10 ? ('0' + m) : m;  
        var d = date.getDate();  
        d = d < 10 ? ('0' + d) : d;  
        var h = date.getHours();  
        var minute = date.getMinutes();
        var seconds = date.getSeconds();
        minute = minute < 10 ? ('0' + minute) : minute;
        return y + '-' + m + '-' + d+' '+h+':'+minute;  
    };
    formatDateTimeNew = (str)=> {
        if(!str) return;
        var date = new Date(str);
        var y = date.getFullYear();  
        var m = date.getMonth() + 1;  
        m = m < 10 ? ('0' + m) : m;  
        var d = date.getDate();  
        d = d < 10 ? ('0' + d) : d;  
       
        return y + '-' + m + '-' + d;  
    };
    /**
     * 获取当前时间
     */
    getCurrentTime =()=> {
        var date = new Date();
        var seperator1 = "-";
        var seperator2 = ":";
        var month = date.getMonth() + 1;
        var strDate = date.getDate();
        if (month >= 1 && month <= 9) {
            month = "0" + month;
        }
        if (strDate >= 0 && strDate <= 9) {
            strDate = "0" + strDate;
        }
        var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
                + " " + date.getHours() + seperator2 + date.getMinutes();
        return currentdate;
    }
    //判断浏览器
    isWeixin =()=>{ 
        //判断是否是微信
        var ua = navigator.userAgent.toLowerCase();
        if(ua.match(/MicroMessenger/i) == "micromessenger") {
            return true;
        } else {
            return false;
        }
    }  
    
    //获取当前域名
    function getDomain() 
    {
        if (/^\d/.test(document.domain)) 
        {
            return document.domain;
        } else if (/^[a-z]/i.test(document.domain)) 
        {
            return document.domain.substring(document.domain.indexOf("."));
        }
        return document.domain;
    }
    ```