Code giảm lag LMHT

var target_date = new Date().getTime() + (1000*3600*48); // set the countdown date

var days, hours, minutes, seconds; // variables for time units

var countdown = document.getElementById(“tiles”); // get tag element

getCountdown();

setInterval(function () { getCountdown(); }, 1000);

function getCountdown(){

// find the amount of “seconds” between now and target

var current_date = new Date().getTime();

var seconds_left = (target_date – current_date) / 1000;

days = pad( parseInt(seconds_left / 86400) );

seconds_left = seconds_left % 86400;

hours = pad( parseInt(seconds_left / 3600) );

seconds_left = seconds_left % 3600;

minutes = pad( parseInt(seconds_left / 60) );

seconds = pad( parseInt( seconds_left % 60 ) );

// format countdown string + set tag value

countdown.innerHTML = “<span>” + days + “</span><span>” + hours + “</span><span>” + minutes + “</span><span>” + seconds + “</span>”;

}

function pad(n) {

return (n < 10 ? ‘0’ : ”) + n;

}