Javascript math.round閾值

我跟蹤一個計時器，我想以5秒爲間隔觸發。問題是與我的Javascript math.round閾值

if (Math.round(time.position) % 5 === 0){do stuff}

測試觸發太多次了。它會觸發所有的9.〜十進制值。如何以5秒爲間隔觸發？

time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.29} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.43} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.54} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.68} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.79} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 9.92} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.03} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.18} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.29} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.42} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.54} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.68} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.79} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 10.92} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 11.04} index.html:104 
time: Object {duration: 149.49, type: "jwplayerMediaTime", position: 11.17}

來源

2014-09-23 seasick

'setInterval（function（）{...}，5000）;'是否足夠？ – Mandera 2014-09-23 22:14:51

不，這是由視頻播放器定時器觸發的。 – seasick 2014-09-23 22:15:05

你必須跟蹤你已經覆蓋的職位。 – Pointy 2014-09-23 22:15:21

這會每隔5秒觸發一次我相信。

var previousValue = 1; 
if(Math.ceil(time.position/5) !== previousValue) { 
    previousValue = Math.ceil(time.position/5); 
}

確保您只調用第一行一次。

來源

2014-09-23 22:18:46 Mandera

謝謝，謝謝！ – seasick 2014-09-23 22:21:56

Javascript math.round閾值

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