js倒计时与日期间隔计算

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js倒计时

/***[countDown日期，必填] *@param {a} 日期*@param {b} 日期*/let a = '2017-10-10 11:51:00';let b = '2017-10-24 12:51:00';function countDown(start, end) {    var distance = Math.abs(Date.parse(start) / 1000 - Date.parse(end) / 1000);    var timer = setInterval(()=> {        distance--;        let obj = {            "d":parseInt(distance / (24 * 60 * 60)),            "h":parseInt((distance % (60 * 60 * 24)) / (60 * 60)),            "m":parseInt((distance % (60 * 60)) / 60),            "s":parseInt(distance % 60),        };        for(let k in obj){            if(parseInt(obj[k]) < 10){                obj[k] = '0' + obj[k]            }        }        let str = `倒计时：${obj.d}天${obj.h}时${obj.m}分${obj.s}秒`;        console.log(str)        if(distance == 0){            clearInterval(timer)        }    }, 1000)}countDown(a, b)

js日期间隔判断

/***[checkDate日期，天数，必填] *@param {val，days}日期，间隔天数*@return [boolean] [是否超过日期间隔天数]*/function checkDate(val, days) {    let allSec = days * 24 * 60 * 60;    let tm = val.replace(' ','T');    let checkSec = Date.parse(tm) / 1000;    let nowSec = Date.parse(new Date()) / 1000;    let interval = nowSec - checkSec;    return interval >= allSec}checkDate()

注意：实测Date.parse( )，new Date().getTime()转化’xxxx-xx-xx xx:xx:xx’格式的时间失效，需将’xxxx-xx-xx xx:xx:xx’转化为’xxxx-xx-xxTxx:xx:xx’

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