remain time

remainTime.js

var MS_DAY = 1000 * 60 * 60 * 24;
var MS_HOUR = 1000 * 60 * 60;
var MS_MINUTE = 1000 * 60;
var MS_SECOND = 1000;

function  addBit(num) {
    var str = "" + num;
    if (num < 10 && num > -1) {
        str = "0" + num;
    }
    return str;
}

function remainTime(ms) {
    var remainMS = ms
    var days = 0
    var hours = 0
    var minutes = 0
    var seconds = 0
    var str = ""

    days = remainMS / MS_DAY | 0;
    hours = remainMS % MS_DAY / MS_HOUR | 0;
    minutes = remainMS % MS_HOUR / MS_MINUTE | 0;
    seconds = remainMS % MS_MINUTE / MS_SECOND | 0;

    if (days) {
        str += days + "天 "
    }
    if (hours) {
        str += hours + ":" //+ (minutes ? "" : "00") + (seconds ? "" : ":00")
    }

    str += minutes ? addBit(minutes) : "00";
    str += ":" + (seconds ? addBit(seconds) : "00");

    return str;
}