我正在為產品發布站點開發倒計時，因此確保同步準確很重要。在我的筆記本電腦上的 netlify 網站上運行它時，它可以工作，并且與在線倒計時相比，它在很大程度上是準確的。但是，當我在手機上打開頁面時，時間完全不同步。整個倒計時javascript如下。 有人能想到解決辦法嗎？//countdownconst countdown = document.querySelector('.countdown');// Set Launch Date (ms)const launchDate = new Date('June 30, 2020 00:00:00').getTime();// Update every secondconst intvl = setInterval(() => {  // Get todays date and time (ms)  const now = new Date().getTime();  // Distance from now and the launch date (ms)  const distance = launchDate - now;  // Time calculation  const days = Math.floor(distance / (1000 * 60 * 60 * 24));  const hours = Math.floor(    (distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)  );  const mins = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));  const seconds = Math.floor((distance % (1000 * 60)) / 1000);  // Display result  countdown.innerHTML = `     <div>${days}<span>Days</span></div>      <div>${hours}<span>Hours</span></div>     <div>${mins}<span>Minutes</span></div>     <div>${seconds}<span>Seconds</span></div>  `;  // If launch date is reached  if (distance < 0) {    // Stop countdown    clearInterval(intvl);    // Style and output text    countdown.style.color = '#17a2b8';    countdown.innerHTML = 'Launched!';    let modal = document.querySelector('.modalDialog');    modal.classList.add('HideModalClass');  }}, 1000);