Question

I made a countdown timer and coded this in with HTML and CSS, but I wasn’t able to make it functional using jQuery. How can I functionalize this countdown? Here is the HTML structure I prefer the countdown to be in:

    <div id="counter-container">
      <div class="counter-box">
        <div class="counter"><p class="counter-p">#</p></div>
        <p class="counter-box-p">days</p>
      </div>
      <div class="counter-box">
        <div class="counter"><p class="counter-p">#</p></div>
        <p class="counter-box-p">hours</p>
      </div>
      <div class="counter-box">
        <div class="counter"><p class="counter-p">#</p></div>
        <p class="counter-box-p">minutes</p>
      </div>
      <div class="counter-box">
        <div class="counter"><p class="counter-p">#</p></div>
        <p class="counter-box-p">seconds</p>
      </div>

As you can see, I have already added paragraph elements for days, hours etc, therefore I do not want to embed any extra text through jQuery.

P.S. Could anyone please tell me how to set a new countdown date?

Answer 1

function counter(count) {
  countdown = setInterval(function(){
    var temp;
    $("p#d").html(Math.floor(count/(60*60*24)));
    temp = count%(60*60*24);
    $("p#h").html(Math.floor(temp/(60*60)));
    temp = count%(60*60);
    $("p#m").html(Math.floor(temp/(60)));
    temp = count%(60);
    $("p#s").html(temp);
    if (count == 0) {
         alert("time's up");
         clearInterval(countdown);       
    }
    count--;
  }, 1000);
}

counter(60*60*24*2);

​demo

EDIT-1:

counter gets time as seconds.

counter(10); //10 seconds
counter(10*60) //600 seconds -> 10 minutes.
counter(10*60*60) //36000 seconds -> 600 minutes -> 10 hour

EDIT-2:

if you want it to work Date based, you should change function like this,

function counter(futureDate) {
  var today = new Date(); // today
  count = Math.floor((futureDate-today)/1000);
  countdown = setInterval(function(){
    var temp;
    $("p#d").html(Math.floor(count/(60*60*24)));
    temp = count%(60*60*24);
    $("p#h").html(Math.floor(temp/(60*60)));
    temp = count%(60*60);
    $("p#m").html(Math.floor(temp/(60)));
    temp = count%(60);
    $("p#s").html(temp);
    if (count == 0) {
         alert("time's up");
         clearInterval(countdown);       
    }
    count--;
  }, 1000);
}

counter(new Date(2012,4,8)); // May 8, 2012 00:00:00
/* counter(new Date(2012,4,8,15,49,10)); // May 8, 2012 15:49:00 */
​

http://jsfiddle.net/NfLAB/1/