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  • js 设置有效的localStorage

    /**
     * 设置有时效的localStorage
     * @调用:setSessionStorage('access_token', '123456', 5000);
     * @调用:getSessionStorage('access_token');
     */
    export function setLocalStorage(key, value, expires) {
        let params = { key: key, value: value, expires: expires};
        if (expires) {
            // 记录何时将值存入缓存,毫秒级
            let data = Object.assign(params, { startTime: new Date().getTime() });
            localStorage.setItem(key, JSON.stringify(data));
        } else {
            if (Object.prototype.toString.call(value) == '[object Object]') {
                value = JSON.stringify(value);
            }
            if (Object.prototype.toString.call(value) == '[object Array]') {
                value = JSON.stringify(value);
            }
            localStorage.setItem(key, value);
        }
    }
    // 获取有时效的sessionStorage
    export function getLocalStorage(key) {
        let item = localStorage.getItem(key);
        // 先将拿到的试着进行json转为对象的形式
        try {
            item = JSON.parse(item);
        } catch (error) {
            // eslint-disable-next-line no-self-assign
            item = item;
        }
        // 如果有startTime的值,说明设置了失效时间
        if (item && item.startTime) {
            let date = new Date().getTime();
            // 如果大于就是过期了,如果小于或等于就还没过期
            if (date - item.startTime > item.expires) {
                localStorage.removeItem(key);
                return '';
            } else {
                return item.value;
            }
        } else {
            return item;
        }
    }
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  • 原文地址:https://www.cnblogs.com/ivan5277/p/15105104.html
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