1、localstorage存取：

export const Storage = {
    storage: window.localStorage,
    set(item, value) {
        if (typeof value === "object") {
            value = JSON.stringify(value);
        }

        return this.storage.setItem(item, value);
    },
    get(item) {
        const itemStr = this.storage.getItem(item);

        if (itemStr) {
            try {
                return JSON.parse(itemStr)
            } catch(err) {
                return itemStr
            }

           // return JSON.parse(itemStr);
        } else {
            return null;
        }
    },
    remove(item) {
        return this.storage.removeItem(item);
    },
    clear() {
        return this.storage.clear();
    },
    keys() {
        let arr = [];
        for (let i = 0; i < window.localStorage.length; i++) {
            arr.push(window.localStorage.key(i));
        }
        return arr;
    }
};

2、cookie存取、设置过期时间

export const Cookie = {
    get(name) {
        const reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
        let arr = document.cookie.match(reg);
        if (arr) {
            return decodeURIComponent(arr[2]);
        } else {
            return null;
        }
    },
    set(name, value, time) {
        /*
        * 取时函数
        *   这是有设定过期时间的使用示例：
        *   s是指秒，如20秒则是：s20
        *   h是指时，如12小时则是：h12
        *   d是指天，如30天则：d30
        * */
        const getsec = str => {
            const str1 = str.substring(1, str.length) * 1;
            const str2 = str.substring(0, 1);
            return {'s':str1 * 1000, 'h':str1 * 60 * 60 * 1000, 'd':str1 * 24 * 60 * 60 * 1000}[str2];
        };

        if (!time) {
            const Days = 30;
            const exp = new Date();
            exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
            document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString() + "; path=/";
        } else {
            const strsec = getsec(time);
            const exp = new Date();
            exp.setTime(exp.getTime() + strsec * 1);
            document.cookie = name + "=" + encodeURIComponent(value) + ";expires=" + exp.toGMTString() + "; path=/";
        }
    },
    remove(name) {
        const exp = new Date();
        exp.setTime(exp.getTime() - 1);
        const cval = this.get(name);
        if (cval !== null)
            document.cookie = name + "=" + encodeURIComponent(cval) + ";expires=" + exp.toGMTString() + "; path=/";
    }
};