本地存储localStorage（设置/获取/清空）-JavaS

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本地存储localStorage(设置/获取/清空)

用法:handleStore.set(name,value,day)/get(name)/clear(name)

// 解释: set-设置，get-获取，clear-清空 （name:名词、value:值、day:时间）
const handleLocalStorage = { 
    // 设置
    set: (name, value, day) => { 
        let d = new Date()
        let time = 0
        // 时间默认为1天
        day = (typeof(day) === 'undefined' || !day) ? 1 : day
        // 毫秒
        time = d.setHours(d.getHours() + (24 * day))
        localStorage.setItem(name, JSON.stringify({
            data: value,
            time: time
        }))
    },
    // 获取
    get: (name) => {
        let data = localStorage.getItem(name)
        if (!data) {
            return null
        }
        let obj = JSON.parse(data)
        // 过期
        if (new Date().getTime() > obj.time) {
            localStorage.removeItem(name)
            return null
        } else {
            return obj.data
        }
    },
    // 清空
    clear: (name) => { 
        // 清空name
        if (name) {
            localStorage.removeItem(name)
        }
        // 清空全部 
        else { 
            localStorage.clear()
        }
    }
}

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