您的浏览器不支持canvas标签,请您更换浏览器

jsCookie,LocalStorage,SessionStorage

Cookie

// 获取文件
var MyCookie = {
	get: function get(name) {
		var reg = new RegExp('(^| )' + name + '=([^;]*)(;|$)');
		var arr = document.cookie.match(reg);
		return arr ? decodeURIComponent(decodeURI((arr[2]))) : null;
	},
	/**
	 * @param expires {Number} cookie的过期时间,存入时开始后的第几天
	 */
	set: function set(name, value, expires = 30){
		var exp = new Date();
		exp.setTime(exp.getTime() + expires * 24 * 60 * 60 * 1000);
		document.cookie = name + '=' + encodeURIComponent(encodeURI(value)) + ';expires=' + exp.toGMTString();
	},
	del: function del(name){
		var exp = new Date();
		exp.setTime(exp.getTime() - 1);
		var value = getCookie(name);
		if (value != null) {
			document.cookie = name + '=' + value + ';expires=' + exp.toGMTString();
		}
	}
};

·

localStorage

var MyLocalStorage = {
        /**
         * 总容量5M
         * 存入缓存,支持字符串类型、json对象的存储
         * 页面关闭后依然有效 ie7+都有效
         * @param key 缓存key
         * @param value
         * @time 数字 缓存有效时间(秒) 默认1200s
         * 注:localStorage 方法存储的数据没有时间限制。第二天、第二周或下一年之后,数据依然可用。不能控制缓存时间,故此扩展
         * */
        set: function set(key, value, time) {
            if (!localStorage) {
                return false;
            }
            if (!time || isNaN(time)) {
                time = 1200;
            }
            try {
                var expireDate = (new Date() - 1) + time * 1000;
                localStorage.setItem(key, JSON.stringify({val: value, exp: expireDate}));
            } catch (e) {
            }
            return true;
        },
        get: function get(key) {
            try {
                if (!localStorage) {
                    return null;
                }
                var value = localStorage.getItem(key);
                var result = JSON.parse(value);
                var now = new Date() - 1;
                if (!result) {
                    return null;
                }// 缓存不存在
                if (now > result.exp) { // 缓存过期
                    this.del(key);
                    return null;
                }
                return result.val;
            } catch (e) {
                this.del(key);
                return null;
            }
        },
        del: function del(key) {
            if (!localStorage) {
                return false;
            }
            localStorage.removeItem(key);
            return true;
        },
        // 清空所有缓存
        delAll: function delAll(){
            if (!localStorage) {
                return false;
            }
            localStorage.clear();
            return true;
        }
    }

·

SessionStorage

 var MySessionStorage = {
        set: function set(key, vaule) {
            if (!sessionStorage) {
                return false;
            }
            try {
                switch (typeof vaule) {
                    case 'object':
                        vaule = JSON.stringify(vaule);
                        break;
                }
                sessionStorage.setItem(key, vaule);
            } catch (e) {
            }
            return true;
        },
        // **获取缓存*/
        get: function get(key) {
            try {
                if (!sessionStorage) {
                    return null
                }
                var cacheValue = sessionStorage.getItem(key);
                var result = JSON.parse(cacheValue);
                if (typeof result == 'object' && result) {

                } else {
                    result = cacheValue;
                }
                return result;
            } catch (e) {
                this.del(key);
                return null;
            }
        },
        /**
         * 移除缓存,一般情况不手动调用,缓存过期自动调用
         * @param key
         * @returns {boolean}
         */
        del: function del(key) {
            if (!sessionStorage) {
                return false;
            }
            sessionStorage.removeItem(key);
            return true;
        },
        // 清空所有缓存
        delAll: function delAll() {
            if (!sessionStorage) {
                return false;
            }
            sessionStorage.clear();
            return true;
        }
    }

LW放下的博客
请先登录后发表评论
  • latest comments
  • 总共0条评论