Created
June 18, 2015 05:49
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count down
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| function countDown(duration, display) { | |
| var M = 60; | |
| var H = 60 * M; | |
| var D = 24 * H; | |
| var start = Date.now(), | |
| diff, | |
| minutes, | |
| seconds; | |
| function timer() { | |
| // get the number of seconds that have elapsed since | |
| // startTimer() was called | |
| diff = duration - (((Date.now() - start) / 1000) | 0); | |
| // does the same job as parseInt truncates the float | |
| days = (diff / D) | 0; | |
| hours = ((diff % D) / H) | 0; | |
| minutes = ((diff % H) / M) | 0; | |
| seconds = (diff % M) | 0; | |
| display({ | |
| d: days, | |
| h: hours, | |
| m: minutes, | |
| s: seconds | |
| }); | |
| if (diff <= 0) { | |
| // add one second so that the count down starts at the full duration | |
| // example 05:00 not 04:59 | |
| start = Date.now() + 1000; | |
| } | |
| }; | |
| // we don't want to wait a full second before the timer starts | |
| timer(); | |
| setInterval(timer, 1000); | |
| } |
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