CountDown.js

CountDown.js

/**
* CountDown
*/
const msDateCountDown = 1525303846754; //Aqui vc pega o milesegundo atual usando new Date().getTime()
let dateCountDown = new Date(msDateCountDown);
dateCountDown.setMinutes(dateCountDown.getMinutes() + 8);
dateCountDown = dateCountDown.getTime();
let intervalDate;

const formatSeconds = (seconds) => {
  if (seconds <= 9) {
      return `0${seconds}`
  } else {
      return seconds
  }
}

if (msDateCountDown) {
  intervalDate = setInterval(() => {

      let now = new Date().getTime();

      let distance = dateCountDown - now;

      let minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
      let seconds = Math.floor((distance % (1000 * 60)) / 1000);

      if (distance < 0) {
          clearInterval(intervalDate);
      }

      console.log(`${minutes}m${formatSeconds(seconds)}s`) // Aqui vc tem que pegar a div e dar um $(div).innerHTML = `${minutes}m${formatSeconds(seconds)}s`

  }, 1000)
}