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showing results for - "javascript get remaining time from start and end datetime"
Matteo
03 Apr 2017
1function calculateExamRemainingTime(exam_end_at) {
2
3    $(function(){
4
5        const calcNewYear = setInterval(function(){
6
7            const exam_ending_at    = new Date(exam_end_at);
8            const current_time      = new Date();
9           
10            const totalSeconds     = Math.floor((exam_ending_at - (current_time))/1000);;
11            const totalMinutes     = Math.floor(totalSeconds/60);
12            const totalHours       = Math.floor(totalMinutes/60);
13            const totalDays        = Math.floor(totalHours/24);
14
15            const hours   = totalHours - ( totalDays * 24 );
16            const minutes = totalMinutes - ( totalDays * 24 * 60 ) - ( hours * 60 );
17            const seconds = totalSeconds - ( totalDays * 24 * 60 * 60 ) - ( hours * 60 * 60 ) - ( minutes * 60 );
18
19            const examRemainingHoursSection = document.querySelector('#remainingHours');
20            const examRemainingMinutesSection = document.querySelector('#remainingMinutes');
21            const examRemainingSecondsSection = document.querySelector('#remainingSeconds');
22
23            examRemainingHoursSection.innerHTML = hours.toString();
24            examRemainingMinutesSection.innerHTML = minutes.toString();
25            examRemainingSecondsSection.innerHTML = seconds.toString();
26
27        },1000);
28    });
29}
30
31calculateExamRemainingTime('2025-06-03 20:20:20');
32
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