时间相关方法（格式化）

[parse()] 返回1970年1月1日午夜到指定日期（字符串）的毫秒数。 |
时间戳
Math.round(new Date() / 1000) = 1583999922

const date = new Date(timeStamp * 1000); Thu Mar 12 2020 15:58:42 GMT+0800 (中国标准时间)

1.将时间转换为对应格式

/**
 * 将时间转换为对应格式
 * @param {number} timeStamp 传入的原始时间戳
 * @param {string} format 进行格式化的模板
 * @return {string} 返回的格式化后的日期
 */
export function formatDate(timeStamp, format) {
    if (!timeStamp || !format) {
        return '';
    }
    const yearPtn = 'yyyy';
    const monthPtn = 'MM';
    const dayPtn = 'dd';
    const hoursPtn = 'hh';
    const minutesPtn = 'mm';
    const secondsPtn = 'ss';
    const millisecondsPtn = 'S';
    const date = new Date(timeStamp);
    const year = date.getFullYear();
    const month = date.getMonth();
    const day = date.getDate();
    const hours = date.getHours();
    const minutes = date.getMinutes();
    const seconds = date.getSeconds();
    const milliseconds = date.getMilliseconds();
    function _fill_(n) {
        return n < 10 ? `0${n}` : n;
    }
    if (isNaN(year)
        || isNaN(month)
        || isNaN(day)
        || isNaN(hours)
        || isNaN(minutes)
        || isNaN(seconds)
        || isNaN(milliseconds)) {
        return '';
    }
    return format
        .replace(yearPtn, year)
        .replace(monthPtn, _fill_(month + 1))
        .replace(dayPtn, _fill_(day))
        .replace(hoursPtn, _fill_(hours))
        .replace(minutesPtn, _fill_(minutes))
        .replace(secondsPtn, _fill_(seconds))
        .replace(millisecondsPtn, milliseconds);
}

const timeFarmated = formatDate(createdTime, 'MM-dd');