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January 2, 2018 19:42
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>JavaScript Countdown</title> | |
| </head> | |
| <body> | |
| <span id="days">00</span> | |
| <span id="hours">00</span> | |
| <span id="minutes">00</span> | |
| <span id="seconds">00</span> | |
| <script src="countdown.js"></script> | |
| <script> | |
| // var examplecallbackfunction = function(){ | |
| // console.log('Done'); | |
| // } | |
| // countdown('12/12/2014 04:38:50 PM', ['days', 'hours', 'minutes', 'seconds'], | |
| // examplecallbackfunction); | |
| countdown('12/12/2014 04:35:00 PM', ['days', 'hours', 'minutes', 'seconds'], function(){ | |
| console.log('Finished'); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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| var countdown = function(end, elements, callback){ | |
| var _second = 1000, | |
| _minute = _second * 60, | |
| _hour = _minute * 60, | |
| _day = _hour * 24, | |
| end = new Date(end), | |
| timer, | |
| calculate = function(){ | |
| var now = new Date(), | |
| remaining = end.getTime() - now.getTime(), | |
| data; | |
| if(isNaN(end)){ | |
| console.log('Invalid date/time'); | |
| return; | |
| } | |
| if(remaining <= 0){ | |
| // clear our timer | |
| clearInterval(timer); | |
| // callback | |
| if(typeof callback === 'function'){ | |
| callback(); | |
| } | |
| }else{ | |
| if(!timer){ | |
| timer = setInterval(calculate, _second); | |
| } | |
| data = { | |
| 'days': Math.floor(remaining / _day), | |
| 'hours': Math.floor((remaining % _day) / _hour), | |
| 'minutes': Math.floor((remaining % _hour) / _minute), | |
| 'seconds': Math.floor((remaining % _minute) / _second) | |
| } | |
| if(elements.length){ | |
| for(x in elements){ | |
| var x = elements[x]; | |
| data[x] = ('00' + data[x]).slice(-2); | |
| document.getElementById(x).innerHTML = data[x]; | |
| } | |
| } | |
| } | |
| }; | |
| calculate(); | |
| } |
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