js常用的函数(封装)

• //获取当前日期时间

let current = function(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

    let viewport = {
        width: $(window).width(),
        height: $(window).height()
    };

• //获取当前页面的名称

    let getPageName = function() {
        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);
        }
        return href;
    };

//设置本地缓存
//修改人：zhou.fx
e.setLocalStorage = function(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
//修改人zhou.fx
e.getLocalStorage = function(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
e.removelocalStorage = function(key) {
    if (window.localStorage) {
        window.localStorage.removeItem(key);
    }
};

//设置运行时缓存setSessionStorage
e.setSessionStorage = function(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
e.getSessionStorage = function(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
e.removeSessionStorage = function(key) {
    if (window.sessionStorage) {
        window.sessionStorage.removeItem(key);
    }
};

//获取某个cookie
e.getCookie = function(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
e.setCookie = function(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;
    }
};