show time in HH:MM only in this javascript code [duplicate] - javascript

This question already has answers here:
Current time formatting with Javascript
(16 answers)
Closed 8 years ago.
The following JS shows the time in HH:MM:SS format while I need it to show HH:MM only
setInterval(function() {
var d = new Date();
var t = d.getTime();
var interval = 5*60*1000;
var last = t - t % interval;
var next = last + interval + 10*60000;
d.setTime(next);
var time = d.toLocaleTimeString();
$(".clock").html(time);
}, 1000);
Any idea on how to achieve that?
Fiddle: http://jsfiddle.net/7z9boag8/

There's getHours() and getMinuets() methods available.
example:
http://jsfiddle.net/0todu2y7/
jQuery(function($) {
setInterval(function() {
var d = new Date();
var t = d.getTime();
var interval = 5*60*1000;
var last = t - t % interval;
var nextt = last + interval + 5*60000;
d.setTime(nextt);
var hours = d.getHours();
var min = d.getMinutes();
$(".clock").html(hours+":"+min);
}, 1000);
});

i am sorry . i m not edit your code . i just give you another procedure
String.prototype.toHHMMSS = function () {
var sec_num = parseInt(this, 10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
var seconds = sec_num - (hours * 3600) - (minutes * 60);
if (hours < 10) {hours = "0"+hours;}
if (minutes < 10) {minutes = "0"+minutes;}
if (seconds < 10) {seconds = "0"+seconds;}
var time = hours+':'+minutes+':'+seconds;
return time;
}
Second Formula is
function checkTime(i) {
if (i < 10) {
i = "0" + i;
}
return i;
}
function yourTime() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
// add a zero in front of numbers<10
m = checkTime(m);
s = checkTime(s);
document.getElementById('time').innerHTML = h + ":" + m + ":" + s;
t = setTimeout(function () {
startTime()
}, 500);
}
yourTime();

Try this:
var time = d.toLocaleTimeString().match(/(\d+:\d+):\d+( \w{2})*/);
var time = time[1] + (time[2] ? time[2] : "");

setInterval(function() {
var d = new Date();
var t = d.getTime();
var interval = 5*60*1000;
var last = t - t % interval;
var next = last + interval + 10*60000;
d.setTime(next);
var time = d.toLocaleTimeString().split(':')
time.pop()
time.join(':')
$(".clock").html(time);
}, 60000);
I don't think that u shuold run tins function every second. U may do it once in minute.

Related

Countdown midnight server with PHP, vanilla js and Ajax

Okay i am trying once again since last time my post got flagged as a duplicate of something entirely different than what i were asking so basically the quick stackof'ers who does this to vannilla/php questions ruined my post and i got no valid answers...
This is not a jQuery question...
This is not a Ajax response question...
(I even found my own post as googles 1st result when trying to find answers for my question)
Sample here
Basically i made a midnight countdown timer in Javascript which works perfectly...
I am trying to make it countdown to midnight of server and not the local machine, so i did a Ajax call where i echo getTime(); and i am trying to put this.responseText inside where i used now.getTime();
Javascript/Ajax
(function () {
var serverMilli = document.getElementById("serverMilli");
var serverCountdown = document.getElementById("serverCountdown");
var machineMilli = document.getElementById("machineMilli");
var machineCountdown = document.getElementById("machineCountdown");
let serverTime;
var http = new XMLHttpRequest();
var url = "time.php";
http.open("POST", url, true);
http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http.onreadystatechange = function () {
if (http.readyState === 4 && http.status === 200) {
serverTime = this.responseText;
serverMilli.textContent = this.responseText;
}
;
};
http.send();
function countDownServer() {
var now = new Date();
var currentTime = serverTime - now.getTime();
var eventDate = new Date();
eventDate.setDate(now.getDate() + 1);
eventDate.setHours(24);
eventDate.setMinutes(0);
eventDate.setSeconds(0);
eventDate.setMilliseconds(0);
var eventTime = eventDate.getTime();
var remainingTime = eventTime - currentTime;
var sekunder = Math.floor(remainingTime / 1000);
var minutter = Math.floor(sekunder / 60);
var timer = Math.floor(minutter / 60);
sekunder %= 60;
minutter %= 60;
timer %= 24;
sekunder = (sekunder < 10) ? "0" + sekunder : sekunder;
minutter = (minutter < 10) ? "0" + minutter : minutter;
timer = (timer < 10) ? "0" + timer : timer;
var testServer = timer + ":" + minutter + ":" + sekunder;
serverCountdown.textContent = testServer;
setTimeout(countDownServer, 1000);
}
countDownServer();
function countDownMachine() {
var now = new Date();
var currentTime = now.getTime();
machineMilli.textContent = currentTime;
var eventDate = new Date();
eventDate.setDate(now.getDate() + 1);
eventDate.setHours(24);
eventDate.setMinutes(0);
eventDate.setSeconds(0);
eventDate.setMilliseconds(0);
var eventTime = eventDate.getTime();
var remainingTime = eventTime - currentTime;
var sekunder = Math.floor(remainingTime / 1000);
var minutter = Math.floor(sekunder / 60);
var timer = Math.floor(minutter / 60);
sekunder %= 60;
minutter %= 60;
timer %= 24;
sekunder = (sekunder < 10) ? "0" + sekunder : sekunder;
minutter = (minutter < 10) ? "0" + minutter : minutter;
timer = (timer < 10) ? "0" + timer : timer;
var testMachine = timer + ":" + minutter + ":" + sekunder;
machineCountdown.textContent = testMachine;
setTimeout(countDownMachine, 1000);
}
countDownMachine();
})();
All i had to do was to do time() * 1000 because time() returns seconds and .getTime() returns milliseconds... waow cant believe i oversaw this and had so many problems, cant believe none from stf dident see this xD

How to calculate the time difference using java script?

I'm getting date from the API in this format 14:30:00 inside "this.StartTime". My question is how can I calculate the time difference between the date I'm getting inside "this.StartTime" and present date?
Following is my component.ts code:-
getBookingDetails() {
this._CounsellingService.getBookingDetails().subscribe(
response => {
this.sessionDetails = response;
this.StartTime = this.sessionDetails.StartTime;
}
);
}
You can create a date today and then set its time part as startDate. Then compare it with current time;
var startTime = "14:30:00".split(":");
var h = startTime[0];
var m = startTime[1];
var s = startTime[2];
var now = new Date();
startTime = new Date(now);
startTime.setHours(h);
startTime.setMinutes(m);
startTime.setSeconds(s);
difference = startTime.getTime() - now.getTime();
console.log(msToTime(difference))
function msToTime(s) {
var ms = s % 1000;
s = (s - ms) / 1000;
var secs = s % 60;
s = (s - secs) / 60;
var mins = s % 60;
var hrs = (s - mins) / 60;
return hrs + ':' + mins + ':' + secs + '.' + ms;
}

calculate time difference between two date in HH:MM:SS javascript

I have created one timer application in javascript.
Firstly it takes the current UTC date to init timer with some reference. here's the code
on_timer: function(e) {
var self = this;
if ($(e.target).hasClass("pt_timer_start")) {
var current_date = this.get_current_UTCDate();
this.project_timesheet_db.set_current_timer_activity({date: current_date});
this.start_interval();
this.initialize_timer();
this.$el.find(".pt_timer_start,.pt_timer_stop").toggleClass("o_hidden");
Now, Once timer is started and after some time span timer has some elapsed time with reference to above on_timer: function(e) function.
This function is
start_interval: function() {
var timer_activity = this.project_timesheet_db.get_current_timer_activity();
var self = this;
this.intervalTimer = setInterval(function(){
self.$el.find(".pt_duration").each(function() {
var el_hour = $(this).find("span.hours");
var el_minute = $(this).find("span.minutes");
var minute = parseInt(el_minute.text());
if(minute >= 60) {
el_hour.text(_.str.sprintf("%02d", parseInt(el_hour.text()) + 1));
minute = 0;
}
el_minute.text(_.str.sprintf("%02d", minute));
var el_second = $(this).find("span.seconds");
var seconds = parseInt(el_second.text()) + 1;
if(seconds > 60) {
el_minute.text(_.str.sprintf("%02d", parseInt(el_minute.text()) + 1));
seconds = 0;
}
el_second.text(_.str.sprintf("%02d", seconds));
});
}, 1000);
},
Now, considering el_hour, el_minute, el_seconds How to can i count time difference between init time and current timer value in HH:MM:SS manner.
thanks in advance for help
To convert H:M:S to seconds, you can use a simple function like:
// Convert H:M:S to seconds
// Seconds are optional (i.e. n:n is treated as h:s)
function hmsToSeconds(s) {
var b = s.split(':');
return b[0]*3600 + b[1]*60 + (+b[2] || 0);
}
Then to convert seconds back to HMS:
// Convert seconds to hh:mm:ss
// Allow for -ve time values
function secondsToHMS(secs) {
function z(n){return (n<10?'0':'') + n;}
var sign = secs < 0? '-':'';
secs = Math.abs(secs);
return sign + z(secs/3600 |0) + ':' + z((secs%3600) / 60 |0) + ':' + z(secs%60);
}
var a = '01:43:28';
var b = '12:22:46';
console.log(secondsToHMS(hmsToSeconds(a) - hmsToSeconds(b))); // -10:39:18
console.log(secondsToHMS(hmsToSeconds(b) - hmsToSeconds(a))); // 10:39:18
You may want to abbreviate the function names to say:
toHMS(toSec(a) - toSec(b)); // -10:39:18
Note that this doesn't cover where the time may cross a daylight saving boundary. For that you need fully qualified dates that include the year, month and day. Use the values to create date objects, find the difference, convert to seconds and use the secondsToHMS function.
Edit
The question title mentions dates, however the content only seems to mention strings of hours, minutes and seconds.
If you have Date objects, you can get the difference between them in milliseconds using:
var diffMilliseconds = date0 - date1;
and convert to seconds:
var diffSeconds = diffMilliseconds / 1000;
and present as HH:MM:SS using the secondsToHMS function above:
secondsToHMS((date0 - date1) / 1000);
e.g.
var d0 = new Date(2014,10,10,1,43,28);
var d1 = new Date(2014,10,10,12,22,46);
console.log( secondsToHMS((d0 - d1) / 1000)); // -10:39:18
I think there is a simpler solution.
function dateDiffToString(a, b){
// make checks to make sure a and b are not null
// and that they are date | integers types
diff = Math.abs(a - b);
ms = diff % 1000;
diff = (diff - ms) / 1000
ss = diff % 60;
diff = (diff - ss) / 60
mm = diff % 60;
diff = (diff - mm) / 60
hh = diff % 24;
days = (diff - hh) / 24
return days + ":" + hh+":"+mm+":"+ss+"."+ms;
}
var today = new Date()
var yest = new Date()
yest = yest.setDate(today.getDate()-1)
console.log(dateDiffToString(yest, today))
const dateDiffToString = (a, b) => {
let diff = Math.abs(a - b);
let ms = diff % 1000;
diff = (diff - ms) / 1000;
let s = diff % 60;
diff = (diff - s) / 60;
let m = diff % 60;
diff = (diff - m) / 60;
let h = diff;
let ss = s <= 9 && s >= 0 ? `0${s}` : s;
let mm = m <= 9 && m >= 0 ? `0${m}` : m;
let hh = h <= 9 && h >= 0 ? `0${h}` : h;
return hh + ':' + mm + ':' + ss;
};
This may be the simple answer
var d1 = new Date(2014,10,11,1,43,28);
var d2 = new Date(2014,10,11,2,53,58);
var date = new Date(d2-d1);
var hour = date.getUTCHours();
var min = date.getUTCMinutes();
var sec = date.getUTCSeconds();
var day = date.getUTCDate() - 1;
console.log(day + ":" + hour + ":" + min + ":" + sec)
More intuitive and easier to read.
function hmsToSeconds(t) {
const [hours, minutes, seconds] = t.split(':')
return Number(hours) * 60 * 60 + Number(minutes) * 60 + Number(seconds)
}
function secondsToHMS(secs) {
return new Date(secs * 1000).toISOString().substr(11, 8)
}
var startTime = '01:43:28';
var endTime = '12:22:46';
console.log(secondsToHMS(hmsToSeconds(endTime) - hmsToSeconds(startTime))); //10:39:18

How to keep updating datetime every minute in Javascript?

I am using following code to display date on my webpage. I need to update it every minute. How to do that?
var d=new Date();
var n=d.toString();
document.write(n);
Currently its static, means when the page load, datetime of that moment is displayed. I have to update time every minutes without refreshing the page.
Try with setInterval(): http://jsfiddle.net/4vQ8C/
var nIntervId; //<----make a global var in you want to stop the timer
//-----with clearInterval(nIntervId);
function updateTime() {
nIntervId = setInterval(flashTime, 1000*60); //<---prints the time
} //----after every minute
function flashTime() {
var now = new Date();
var h = now.getHours();
var m = now.getMinutes();
var s = now.getSeconds();
var time = h + ' : ' + m + ' : ' + s;
$('#my_box1').html(time); //<----updates the time in the $('#my_box1') [needs jQuery]
}
$(function() {
updateTime();
});
You can use document.getElementById("my_box1").innerHTML=time; instead of $('#my_box1')
from MDN:
About setInterval : --->Calls a function or executes a code snippet repeatedly, with a fixed time delay between each call to that function.
About setTimeout : ----> Calls a function or executes a code snippet after specified delay.
Here is how you can print date time every second
function displayDate()
{
var n=BuildDateString();
document.write(n);
window.setTimeout("displayDate();", 1000); // to print it every minute take 1000*60
}
function BuildDateString()
{
var today = new Date()
var year = today.getYear()
if (year < 2000)
year = "19" + year
var _day = today.getDate()
if (_day < 10)
_day = "0" + _day
var _month = today.getMonth() + 1
if (_month < 10)
_month = "0" + _month
var hours = today.getHours()
var minutes = today.getMinutes()
var seconds = today.getSeconds()
var dn = "AM"
if (hours > 12)
{
dn = "PM"
hours = hours - 12
}
if (hours == 0)
hours = 12
if (minutes < 10)
minutes = "0" + minutes
if (seconds < 10)
seconds = "0" + seconds
var DateString = _month+"/"+_day+"/"+year+" "+hours+":"+minutes+":"+seconds+" "+dn
return DateString;
}
I am using following approach:
var myVar=setInterval(function(){myDateTimer()},60000);
function makeArray()
{
for (i = 0; i<makeArray.arguments.length; i++)
this[i + 1] = makeArray.arguments[i];
}
function myDateTimer()
{
var months = new makeArray('January','February','March','April','May',
'June','July','August','September','October','November','December');
var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
var date = new Date();
var day = date.getDate();
var month = date.getMonth() + 1;
var yy = date.getYear();
var year = (yy < 1000) ? yy + 1900 : yy;
var hours = date.getHours();
var minutes = date.getMinutes();
var finaldate = days[ date.getDay() ] + ", " + months[month] + " " + day + ", " + year + " " + hours +" : " + minutes;
document.getElementById("showDateTime").innerHTML=finaldate;
}
just do this
$(function(){
setInterval(function(){
var d=new Date();
var n=d.toString();
$('#test').html(n);
},1000);
});
demo http://runjs.cn/code/txlexzuc

Running a Javascript Clock at 4x Speed [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Javascript to run the Clock (date and time) 4 times speeder
I'm trying to make a clock that starts at a time value (hh:mm:ss) that I've supplied, and runs at 4x speed (for the server time of an online game that runs 4x actual time). I've modified a free clock that I found online to do this, but it only works for every other minute (try the code below to see exactly what I mean if that doesn't make sense).
var customClock = (function () {
var timeDiff;
var timeout;
function addZ(n) {
return (n < 10 ? '0' : '') + n;
}
function formatTime(d) {
t1 = d.getHours();
t2 = d.getMinutes();
t3 = d.getSeconds() * 4;
if (t3 > 59) {
t3 = t3 - 60;
t2 = t2 + 1;
}
if (t2 > 59) {
t2 = t2 - 60;
t1 = t1 + 1;
}
if (t1 > 23) {
t1 = 0;
}
return addZ(t1) + ':' + addZ(t2) + ':' + addZ(t3);
}
return function (s) {
var now = new Date();
var then;
var lag = 1015 - now.getMilliseconds();
if (s) {
s = s.split(':');
then = new Date(now);
then.setHours(+s[0], +s[1], +s[2], 0);
timeDiff = now - then;
}
now = new Date(now - timeDiff);
document.getElementById('clock').innerHTML = formatTime(now);
timeout = setTimeout(customClock, lag);
}
}());
window.onload = function () {
customClock('00:00:00');
};
Any idea why this is happening? I'm pretty new to Javascript and this is definitely a little hack-ey. Thanks
i take the orginal time and substract it from the current then multiply it by 4 and add it to the orginal time. I think that should take care or the sync problem.
(function(){
var startTime = new Date(1987,08,13).valueOf() //save the date 13. august 1987
, interval = setInterval(function() {
var diff = Date.now() - startTime
//multiply the diff by 4 and add to original time
var time = new Date(startTime + (diff*4))
console.log(time.toLocaleTimeString())
}, 1000)
}())
How to use with a custom date (use the Date object)
Date(year, month, day, hours, minutes, seconds, milliseconds)
var lag = 1015 - now.getMilliseconds(); is attempting to "run this again a smidge (15 ms) after the next clock tick". Make this value smaller (divide by 4?), and this code will run more frequently.
Next up, get it to show 4x the current clock duration. Similar problem: multiply now's details by 4 either inside or outside formatTime()
I would first create a Clock constructor as follows:
function Clock(id) {
var clock = this;
var timeout;
var time;
this.hours = 0;
this.minutes = 0;
this.seconds = 0;
this.stop = stop;
this.start = start;
var element = document.getElementById(id);
function stop() {
clearTimeout(timeout);
}
function start() {
timeout = setTimeout(tick, 0);
time = Date.now();
}
function tick() {
time += 1000;
timeout = setTimeout(tick, time - Date.now());
display();
update();
}
function display() {
var hours = clock.hours;
var minutes = clock.minutes;
var seconds = clock.seconds;
hours = hours < 10 ? "0" + hours : "" + hours;
minutes = minutes < 10 ? "0" + minutes : "" + minutes;
seconds = seconds < 10 ? "0" + seconds : "" + seconds;
element.innerHTML = hours + ":" + minutes + ":" + seconds;
}
function update() {
var seconds = clock.seconds += 4;
if (seconds === 60) {
clock.seconds = 0;
var minutes = ++clock.minutes;
if (minutes === 60) {
clock.minutes = 0;
var hours = ++clock.hours;
if (hours === 24) clock.hours = 0;
}
}
}
}
Then you can create a clock and start it like this:
var clock = new Clock("clock");
clock.start();
Here's a demo: http://jsfiddle.net/Nt5XN/

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