Gadget:Xb3countdown.js

var target = 1659020400000;
function getDiff() {
  return target - new Date().getTime();
}
function format(ts) {
  if (ts > 0) {
    var days = Math.floor(ts / 1000 / 3600 / 24);
    var hours = Math.floor((ts / 1000 / 3600) % 24);
    var minutes = String(Math.floor((ts / 1000 / 60) % 60)).padStart(2, "0");
    var seconds = String(Math.floor((ts / 1000) % 60)).padStart(2, "0");
    return days + " 天 " + hours + " 时 " + minutes + " 分 " + seconds + " 秒";
  }
}
function start(el) {
  el.textContent = format(getDiff());
  setInterval(function () {
    el.textContent = format(getDiff());
  }, 1000);
}
var el = $("#xb3countdown");
if (el.length) {
  start(el[0]);
}