W3Schools Tryit 编辑器 - W3Schools 中文教程

<!DOCTYPE html>
<html>
<body>

<h1>My First Web Page</h1>

<p>The weekend is only <span id="weekend_countdown"></span> from now!</p>

// Find the next Saturday
    var daysToSaturday = (6 - currentDate.getDay() + 7) % 7; // Number of days until the next Saturday
    var nextSaturday = new Date(currentDate.getFullYear(), currentDate.getMonth(), currentDate.getDate() + daysToSaturday);
    
    // Calculate the remaining time
    var timeRemaining = nextSaturday.getTime() - currentDate.getTime();
    var daysRemaining = Math.floor(timeRemaining / (1000 * 60 * 60 * 24));
    var hoursRemaining = Math.floor((timeRemaining % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));

// Display the countdown on the web page
    var countdownElement = document.getElementById("weekend_countdown");
    countdownElement.innerHTML = daysRemaining + " days and " + hoursRemaining + " hours";
  }

// Call the countdown function when the page loads
  window.onload = function() {
    countdown();
  };
</script>

</body>
</html>