js/90-timers.js

   1 (function(){
   2         'use strict';
   3
   4         function update_timer(timer){
   5                 var start = parseInt(timer.dataset.start);
   6                 var stop  = parseInt(timer.dataset.stop);
   7                 var value = parseInt(timer.dataset.value);
   8                 var now   = Math.floor(Date.now() / 1000);
   9
  10                 var left = stop - now;
  11                 var total = stop - start;
  12                 if(left < 0)
  13                         left = 0;
  14
  15                 if(value) {
  16                         value = Math.max(value * 3 / 10, value * left / total);
  17                         timer.innerHTML = Math.floor(value);
  18                 } else {
  19                         var hours = left / 60 / 60;
  20                         var minutes = left / 60 % 60;
  21                         var seconds = left % 60;
  22                         timer.innerHTML = sprintf('%02d:%02d:%02d', hours, minutes, seconds);
  23                 }
  24         }
  25
  26         $( document ).ready(function() {
  27                 $('.timer').each(function(index, item){
  28                         update_timer(item);
  29                         setInterval(function(){update_timer(item)}, 1000);
  30                 });
  31         });
  32 })();