每天减少计数器目标值直到零

Question

知道如何自动将值设置为未来日期和今天日期的差值吗？我正在努力让这段代码工作。

<span class="count">200</span>
<span class="count2">200.7</span>
<span class="count" id="reducedaily">1000</span>

const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds
const firstDate = new Date(2020, 10, 2);
const secondDate = new Date();
const diffDays = Math.round(Math.abs((firstDate - secondDate) / oneDay));
jQuery(#reducedaily).text(diffDays);

jQuery('.count, .count2').each(function () {
  jQuery(this).prop('Counter',0).animate({
    Counter: jQuery(this).text()
  }, {
      duration: 4000,
      easing: 'swing',
      step: function (now) {
        if(jQuery(this).hasClass('count')){
          jQuery(this).text(now.toFixed(0));
        }
        else{
          jQuery(this).text(now.toFixed(1));
        }
      }
  });
});

Answer 1

我没有发现您的代码有任何问题 - 非 jQuery 版本似乎工作得很好（尽管出于光学考虑，我用更多小数显示日期差异）。

const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds
const firstDate = new Date(2020, 10, 2);

function update() {
  const secondDate = new Date();
  const diffDays = (firstDate - secondDate) / oneDay;
  
  document.getElementById("x").innerText = (diffDays <= 0 ? "no" : diffDays.toFixed(8));
}

setInterval(update, 100);
  

Only <span id="x">some</span> days to go!