I made a timer for a project in school (I am still in school yes and I do not have JavaScript as a lesson that we get this semester) in JavaScript and it continues after the 0. I got some help from a teacher but I can't reach him with the pandemic and stuff.
This is the code that I wrote and what happens is that when it reaches the date that I put in it goes into -0 -0 -0 -01 and continues from there.
const countdown = () => {
let countDate = new Date('Febuary 9, 2022 00:00:00').getTime();
let now = new Date().getTime();
let gap = countDate - now;
let second = 1000;
let minute = second * 60;
let hour = minute * 60;
let day = hour * 24;
let textDay = Math.floor(gap / day);
let textHour = Math.floor((gap % day) / hour);
let textMinute = Math.floor((gap % hour) / minute);
let textSecond = Math.floor((gap % minute) / second);
document.querySelector('.day').innerText = textDay;
document.querySelector('.hour').innerText = textHour;
document.querySelector('.minute').innerText = textMinute;
document.querySelector('.second').innerText = textSecond;
};
setInterval(countdown, 1000);
setInterval returns a value which you can pass to clearInterval to stop the interval from running. Store that value in a variable, for example:
let countInterval = 0;
const countdown = () => {
//...
};
countInterval = setInterval(countdown, 1000);
Then within countdown you can check if you want to clear that interval. For example, if you want to clear it when gap <= 0 you would perform that logic:
if (gap <= 0) {
clearInterval(countInterval);
return;
}
This would stop the interval from running when that condition is eventually met.
Example:
let countInterval = 0;
const countdown = () => {
let countDate = new Date('January 11, 2022 13:35:00').getTime();
let now = new Date().getTime();
let gap = countDate - now;
if (gap <= 0) {
clearInterval(countInterval);
return;
}
let second = 1000;
let minute = second * 60;
let hour = minute * 60;
let day = hour * 24;
let textDay = Math.floor(gap / day);
let textHour = Math.floor((gap % day) / hour);
let textMinute = Math.floor((gap % hour) / minute);
let textSecond = Math.floor((gap % minute) / second);
document.querySelector('.day').innerText = textDay;
document.querySelector('.hour').innerText = textHour;
document.querySelector('.minute').innerText = textMinute;
document.querySelector('.second').innerText = textSecond;
};
countInterval = setInterval(countdown, 1000);<div class="day"></div>
<div class="hour"></div>
<div class="minute"></div>
<div class="second"></div>