js獲取當前時間字符串和計算+1年

獲取當前時間字符串

getTimeStr = (date) => {
        let year = date.getFullYear();
        let month = date.getMonth() + 1;
        let day = date.getDate();
        if (month < 10) {
            month = '0' + month;
        }
        if (day < 10) {
            day = '0' + day;
        }
        return `${year}-${month}-${day}`;
    }
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計算+1年

getTimeAfterOneYear = (date) => {
        date = new Date(date);
        let newDate;
        let year = date && date.getFullYear();
        let addTime;
        if (year && (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0)) {
            addTime = 365 * 24 * 60 * 60 * 1000;
        } else {
            addTime = 366 * 24 * 60 * 60 * 1000;
        }
        newDate = new Date(date.valueOf() + addTime);
        return this.getTimeStr(newDate);
    }
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