javascript简易时间处理类

example.js

var w = require('./with.js');

const serveTime = '2017-01-01 00:00:00';

setInterval(()=> {
    console.log(w.serve(serveTime));
}, 1000);

timeTool.js

// 时间常量
const daySecond = 24 * 3600 * 1000;  // 一天的秒数
const hourSecond = 3600 * 1000;  // 一小时的秒数
const second = 60 * 1000;  // 一分钟的秒数

var time = {}

/**
 * 格式化时间，以年月日时分秒输出
 * param Date date
 * return string
 */
time.YmdHms = (date) => {
    let t = date ? new Date(date) : new Date;
    with (t) return [
        getFullYear(), '年',
        ('0' + (getMonth() + 1)), '月',
        ('0' + getDate()).slice(-2), '日 ',
        ('0' + getHours()).slice(-2), ':',
        ('0' + getMinutes()).slice(-2), ':',
        ('0' + getSeconds()).slice(-2)
    ].join('');
}

/**
 * 格式化时间，以年月日输出
 * param Date date
 * return string
 */
time.Ymd = (date) => {
    let t = date ? new Date(date) : new Date;
    with (t) return [
        getFullYear(), '年',
        ('0' + (getMonth() + 1)), '月',
        ('0' + getDate()).slice(-2), '日'
    ].join('');
}

/**
 * 倒计时
 * param Date date
 * return string
 */
time.serve = (date) => {
    with (Math) {
        var initTime = new Date(date);  // 启动时间
        var nowTime = new Date();  // 当前时间
        let diffTime = nowTime.getTime() - initTime.getTime();  // 时间的秒数差

        let leave1 = diffTime % daySecond;  // 剩下小时的秒数
        let leave2 = leave1 % hourSecond;  // 剩下分钟的秒数
        let leave3 = leave2 % (60 * 1000);  //剩下的秒数

        var hours = Math.floor(leave1 / (3600 * 1000));
        return [
            floor(diffTime / daySecond), '天',
            floor(leave1 / hourSecond), '小时',
            floor(leave2 / second), '分',
            floor(leave3 / 1000), '秒'
        ].join('');
    }

}

module.exports = time;