A Pen by Mohssine aboutaj on CodePen.
Created
June 10, 2019 16:33
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Countdown Timer - pure javaScript
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<!-- | |
** How to use: | |
*** Create a parent element | |
*** set id="timer" | |
*** set data-hours for the hours counter | |
*** set data-minutes for the hours counter | |
*** set data-seconds for the hours counter | |
**** note | |
** if you dont set data-hours, data-minutes, data-seconds by default these set value 0 | |
** if you dont set data-timer-end by default it's set timer-end | |
--> | |
<div id="timer" data-hours="1" data-minutes="2" data-seconds="3"></div> |
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/* | |
** How to use: | |
*** Create a parent element | |
*** set id="timer" | |
*** set data-hours for the hours counter | |
*** set data-minutes for the hours counter | |
*** set data-seconds for the hours counter | |
**** note | |
** if you dont set data-hours, data-minutes, data-seconds by default these set value 0 | |
** if you dont set data-timer-end by default it's set timer-end | |
*/ | |
const oneSec = 1000, | |
container = document.getElementById('timer'); | |
let dataHours = container.getAttribute('data-hours'), | |
dataMinutes = container.getAttribute('data-minutes'), | |
dataSeconds = container.getAttribute('data-seconds'), | |
timerEnd = container.getAttribute('data-timer-end'), | |
timerOnEndMsg = "data-timer-end"; | |
if (dataHours == '' || dataHours == null || dataHours == NaN) { | |
dataHours = "0"; | |
} | |
if (dataMinutes == '' || dataMinutes == null || dataMinutes == NaN) { | |
dataMinutes = "0"; | |
} | |
if (dataSeconds == '' || dataSeconds == null || dataSeconds == NaN) { | |
dataSeconds = "0"; | |
} | |
let hoursSpan = document.createElement('span'), | |
minutesSpan = document.createElement('span'), | |
secondsSpan = document.createElement('span'), | |
separator1 = document.createElement('span'), | |
separator2 = document.createElement('span'), | |
separatorValue = ":", | |
max = 59, | |
s = parseInt(dataSeconds) > max ? max : parseInt(dataSeconds), | |
m = parseInt(dataMinutes) > max ? max : parseInt(dataMinutes), | |
h = parseInt(dataHours); | |
secondsSpan.classList.add('time'); | |
minutesSpan.classList.add('time'); | |
hoursSpan.classList.add('time'); | |
separator1.classList.add('separator'); | |
separator1.textContent = separatorValue; | |
separator2.classList.add('separator'); | |
separator2.textContent = separatorValue; | |
checkValue = (value)=>{ | |
if (value < 10) { | |
return "0" + value; | |
} else { | |
return value; | |
} | |
} | |
hoursSpan.textContent = checkValue(dataHours); | |
minutesSpan.textContent = checkValue(dataMinutes); | |
secondsSpan.textContent = checkValue(dataSeconds); | |
timer = (sv,mv,hv)=>{ | |
s = parseInt(sv); | |
m = parseInt(mv); | |
h = parseInt(hv); | |
if (s > 0) { | |
return s -= 1; | |
} else { | |
s = max; | |
if (m > 0) { | |
return m -= 1; | |
} else { | |
m = max; | |
if (h > 0) { | |
return h -= 1; | |
} | |
} | |
} | |
} | |
finished = ()=>{ | |
max = 0; | |
let timerEnd = container.getAttribute(timerOnEndMsg); | |
container.setAttribute(timerOnEndMsg, 'true'); | |
if (timerEnd == '' || timerEnd == null) { | |
container.textContent = "timer-end"; | |
} else { | |
container.textContent = timerEnd; | |
} | |
} | |
counter = setInterval(()=>{ | |
if (h == 0 && m == 0 && s == 0) { | |
clearInterval(counter, finished()); | |
} | |
if (s >= 0) { | |
timer(s,m,h); | |
hoursSpan.textContent = checkValue(h); | |
minutesSpan.textContent = checkValue(m); | |
secondsSpan.textContent = checkValue(s); | |
} | |
}, oneSec); | |
let children = [hoursSpan, separator1, minutesSpan, separator2, secondsSpan]; | |
for (child of children) { | |
container.appendChild(child); | |
} |
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body { | |
background-color: #272727; | |
color: #eaeaea; | |
} | |
div { | |
text-align: center; | |
font-size: 2em; | |
width: 300px; | |
margin: 10px auto; | |
} | |
div .separator { | |
width: 5% | |
} | |
.time { | |
width: 30%; | |
display: inline; | |
} |
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