Develop Reference

Converting decimal to hours and minutes - Javascript

I just can't figure why this doesn't work for some odd values.
For example when trying to convert 22.68 to hours and minutes the output is 22:40.800000000000004 (Seconds shouldn't even appear)
if (str_HR_PER_WEEK.indexOf('.') > -1)
{
var str_HR_PER_WEEK_hrs = str_HR_PER_WEEK.substring(0 , str_HR_PER_WEEK.indexOf('.'));
var str_HR_PER_WEEK_mins = str_HR_PER_WEEK.substring(str_HR_PER_WEEK.indexOf('.') + 1);
var float_HR_PER_WEEK_mins = parseFloat("0." + (str_HR_PER_WEEK_mins), 10);
var float_HR_PER_WEEK_mins_actual = float_HR_PER_WEEK_mins * 60;
float_HR_PER_WEEK_mins_actual = float_HR_PER_WEEK_mins_actual.toString();
tables.CURRENT_EMPLOYEES.HOURS_PER_WEEK.value = getTwoDigitTime(str_HR_PER_WEEK_hrs) + ":" + getTwoDigitTime(float_HR_PER_WEEK_mins_actual);
}
else
{
tables.CURRENT_EMPLOYEES.HOURS_PER_WEEK.value = str_HR_PER_WEEK;
}

You have to ways to achieve that,
one, do the calculations yourself:
var decimalTimeString = "1.6578";
var decimalTime = parseFloat(decimalTimeString);
decimalTime = decimalTime * 60 * 60;
var hours = Math.floor((decimalTime / (60 * 60)));
decimalTime = decimalTime - (hours * 60 * 60);
var minutes = Math.floor((decimalTime / 60));
decimalTime = decimalTime - (minutes * 60);
var seconds = Math.round(decimalTime);
if(hours < 10)
{
hours = "0" + hours;
}
if(minutes < 10)
{
minutes = "0" + minutes;
}
if(seconds < 10)
{
seconds = "0" + seconds;
}
alert("" + hours + ":" + minutes + ":" + seconds);
Two, use built in function to convert to string and then to hh:mm:
var decimalTimeString = "1.6578";
var n = new Date(0,0);
n.setSeconds(+decimalTimeString * 60 * 60);
n.setMinutes(+decimalTimeString * 60);
var result = n.toTimeString().slice(0, 5);
document.write(result);

I've got a neat function to do just that:
function hoursToHHMM(hours) {
var h = String(Math.trunc(hours)).padStart(2, '0');
var m = String(Math.abs(Math.round((hours - h) * 60))).padStart(2, '0');
return h + ':' + m;
}
It handles negative values as a bonus.
Usage is trivial:
var hours = -7.33333;
console.log(hoursToHHMM(hours));
Results in: -07:20
You can play with it here: https://jsfiddle.net/r150c2me/

how to Calculate response time in asp:repeater textbox using Javascript?

I Have a multiple text-box bounded with asp:repeater , I want to calculate time taken to type a text in that textbox, after textbox appeares. I tried it through onblur and onfocus events , but not working properly, as its taking onfocus time of next textbox while calculating time for previous textbox.
My repeater code is as follows
<asp:Repeater ID="rpt1" runat="server">
<asp:TextBox ID="txt1" autocomplete="off" EnableViewState="true" onfocus="f1(this);" onblur="f2(this);" runat="server"></asp:TextBox>
</asp:Repeater>
And javascript code like this
function f1(e) {
var onFocusTextTime = new Date().getTime();
alert("onFocus:" + onFocusTextTime);
return onFocusTextTime;
}
function f2(e) {
var responceForAnswer = "";
var diff_result = "";
var onBlurTextTime = new Date().getTime();
alert("onBlur:" + onBlurTextTime);
var onFocusTextTime = f1();
diff_result = onFocusTextTime - onBlurTextTime;
alert("diff_result:" + diff_result);
var hours = diff_result / (1000 * 60 * 60);
var absoluteHours = Math.floor(hours);
var h = absoluteHours > 9 ? absoluteHours : '0' + absoluteHours;
var minutes = (hours - absoluteHours) * 60;
var absoluteMinutes = Math.floor(minutes);
var m = absoluteMinutes > 9 ? absoluteMinutes : '0' + absoluteMinutes;
var seconds = (minutes - absoluteMinutes) * 60;
var absoluteSeconds = Math.floor(seconds);
var s = absoluteSeconds > 9 ? absoluteSeconds : '0' + absoluteSeconds;
responceForAnswer = h + ':' + m + ':' + s;
alert("responceForAnswer:" + responceForAnswer);
}

i just changed my code in following way and its worked
var onFocusTextTime;
var onFocusTextTimeForPrevTextBox = new Date().getTime();
function f1(e) {
onFocusTextTime = onFocusTextTimeForPrevTextBox;
onFocusTextTimeForPrevTextBox = new Date().getTime();
return onFocusTextTime;
}
function f2() {
var responceForAnswer = "";
var diff_result = "";
var onBlurTextTime = new Date().getTime();
var onFocusTextTime = f1();
diff_result = onBlurTextTime - onFocusTextTime;
var hours = diff_result / (1000 * 60 * 60);
var absoluteHours = Math.floor(hours);
var h = absoluteHours > 9 ? absoluteHours : '0' + absoluteHours;
var minutes = (hours - absoluteHours) * 60;
var absoluteMinutes = Math.floor(minutes);
var m = absoluteMinutes > 9 ? absoluteMinutes : '0' + absoluteMinutes;
var seconds = (minutes - absoluteMinutes) * 60;
var absoluteSeconds = Math.floor(seconds);
var s = absoluteSeconds > 9 ? absoluteSeconds : '0' + absoluteSeconds;
responceForAnswer = h + ':' + m + ':' + s;
console.log(responceForAnswer);
}

convert audio second time to minute and second format

var currentTime = audio.currentTime | 0;
var duration = audio.duration | 0;
it works but,
it shows the audio's total length and current time in only second format
i want to convert the default second value in Minute:Second format

Try this (lightly tested):
var seconds = currentTime % 60;
var foo = currentTime - seconds;
var minutes = foo / 60;
if(seconds < 10){
seconds = "0" + seconds.toString();
}
var fixedCurrentTime = minutes + ":" + seconds;

var currentTime = audio.currentTime | 0;
var duration = audio.duration | 0;
var minutes = "0" + Math.floor(duration / 60);
var seconds = "0" + (duration - minutes * 60);
var dur = minutes.substr(-2) + ":" + seconds.substr(-2);
var minutes = "0" + Math.floor(currentTime / 60);
var seconds = "0" + (currentTime - minutes * 60);
var cur = minutes.substr(-2) + ":" + seconds.substr(-2);

You can simply write the code yourself; it's not as if it's complicated or would ever change:
function pad(num, size) {
var s = num + '';
while (s.length < size) {
s = '0' + s;
}
return s;
}
function format_seconds(secs) {
return Math.floor(secs / 60) + ':' + (pad(secs % 60, 2));
}

dropping my own answer after 5 years and 9 months.
function() {
if(this.myAudio.readyState > 0) {
var currentTime = this.myAudio.currentTime;
var duration = this.myAudio.duration;
var seconds: any = Math.floor(duration % 60);
var foo = duration - seconds;
var min: any = foo / 60;
var minutes: any = Math.floor(min % 60);
var hours: any = Math.floor(min / 60);
if(seconds < 10){
seconds = "0" + seconds.toString();
}
if(hours > 0){
this.audioDuration = hours + ":" + minutes + ":" + seconds;
} else {
this.audioDuration = minutes + ":" + seconds;
}
}
}
I used typescript, hope this helps...

Countdown alway with two numbers eg: 02:20:02

Hello i have a problem with this code. I have tried several ways but without a success to get zero before hours etc. Also I checked different topics but without a success.
var timestamp = (Date.now() + 1000 * 2 * 60 * 24 * 1) - Date.now();
timestamp /= 1000;
function component(x, v) {
return Math.floor(x / v);
}
/* last thing i tried but maybe it will help someone
Number.prototype.pad = function(size) {
var s = String(this);
while (s.length < (size || 2)) {s = "0" + s;}
return s;
};
*/
var $div = $('div');
setInterval(function () {
timestamp--;
var
hours = component(timestamp, 60 * 60),
minutes = component(timestamp, 60) % 60,
seconds = component(timestamp, 1) % 60;
$div.html(hours + ":" + minutes + ":" + seconds);
}, 1000);
DEMO : http://jsfiddle.net/5z7ahmze/1/
Thank you for your time.

You can check your variable and add a 0 before if needed :
var comp = component(timestamp, 60 * 60);
var hour = comp < 10 ? '0' + comp : comp;

You can create a function like this
function pad(number, length) {
var str = '' + number;
while (str.length < length) {
str = '0' + str;
}
return str;
}
and then
$div.html(pad(hours, 2) + ":" + pad(minutes, 2) + ":" + pad(seconds, 2));

Maybe that is what you want. Right?
EDIT
Ok, the final answer.
var interval = setInterval(function () {
timestamp--;
function addZero (number) {
var zeroedNumber = (number < 10) ? 0 + "" + number : number;
return zeroedNumber;
}
var
hours = addZero(component(timestamp, 60 * 60)),
minutes = addZero(component(timestamp, 60) % 60),
seconds = addZero(component(timestamp, 1) % 60);
$div.html(hours + ":" + minutes + ":" + seconds);
//Below, i helped you with a "stop count" handler. (:
if(hours == 0 & minutes == 0 & seconds == 1){
clearInterval(interval);
}
}, 1000);
Dinamically dding zeroes to your counter if (hour or minute or second) is < 10.

I think your code is working, if you call the pad function on the numbers:
$div.html(hours.pad() + ":" + minutes.pad() + ":" + seconds.pad());

My javascriptcode is working when i put alert.I need to Display time in Counter Format(Seconds decreasing way)

My javascriptcode is working fine when i put alert.I need to Display time in Counter Format(Second decreasing way). Please help me in resolving this issue
<script type="text/javascript">
window.onload = function () {
//alert("request>>>");
var count = 0;
var start_actual_time = document.getElementById("timerStartTime").value;
var end_actual_time = document.getElementById("timerEndTime").value;
start_actual_time = new Date(start_actual_time);
var start_actual_time1 = new Date(start_actual_time.getTime());
start_actual_time1 = new Date(start_actual_time1);
var end_actual_time1 = new Date(end_actual_time);
var hours =end_actual_time1.getHours()- start_actual_time1.getHours();
var minutes = end_actual_time1.getMinutes() - start_actual_time1.getMinutes();
var seconds = end_actual_time1.getSeconds()- start_actual_time1.getSeconds();
seconds = hours * 3600 + minutes * 60 + seconds;
//alert ("seconds >>." +seconds);
timer(seconds);
};
function timer(seconds) {
alert("calling timer");
var s1 = Number(seconds);
var hours = Math.floor(s1 / 3600);
var minutes = Math.floor(s1 % 3600 / 60);
var s = Math.floor(s1 % 3600 % 60);
//alert("sec1" + s);
display = document.querySelector('#time');
var formatted = ((hours < 10)?("0" + hours):hours) + ":" + ((minutes < 10)?("0" + minutes):minutes) + ":" + ((s < 10)?("0" + s):s)
display.textContent = formatted ;
seconds = seconds - 1;
timer(seconds);
}
</script>

The way your code is written creates a
too much recursion
exception for me.
Therefore I have avoided recursive invokes and used javascript setInterval:
var refreshIntervalId = setInterval(function(){ timer(); }, 1000);
When your seconds reach zero, timer is stopped:
if (seconds == -1){
clearInterval(refreshIntervalId);
Link to working fiddle: http://jsfiddle.net/3ggspruf/2/