Simple countdown timer script

SOURCE: https://mindgrader.com/tutorials/1-how-to-create-a-simple-javascript-countdown-timer MODDED: January 10, 2014

USAGE: -- code -- // variables var date = "2014-01-10 10:56:00"; // parsable datetime string 'Aug 15, 2019', '2014-01-10 10:56:00' var id = "myCountdown"; // id container var options = {template: true, autoStop: true, doubleDigit: true}; // all options default to false

// create instance
var countdown = new Countdown(date, id, options);
// start the countdown
countdown.start();

-- html / no template --
<div id="myCountdown"></div>
-- output --
363 : 21 : 54 : 10

-- html / with template --
<div id="myCountdown" style="display:inline-block;">
    <div style="text-align:center;">Remaining</div>
    <div style="display:inline-block; width:100px;">
        <div id="myCountdown-days">&nbsp;</div>
        <div>Days</div>
    </div>
    <div style="display:inline-block; width:100px;">
        <div id="myCountdown-hours">&nbsp;</div>
        <div>Hours</div>
    </div>
    <div style="display:inline-block; width:100px;">
        <div id="myCountdown-minutes">&nbsp;</div>
        <div>Minutes</div>
    </div>
    <div style="display:inline-block; width:100px;">
        <div id="myCountdown-seconds">&nbsp;</div>
        <div>Seconds</div>
    </div>
</div>

For options:
    - template: set true to enable templating
    - autoStop: set true to stop the timer after countdown, displays 00 : 00 : 00 : 00

For templates:
    - format for days: {id}-days i.e., myCountdown-days
    - same format for the rest {id}-hours, {id}-minutes, {id}-seconds