点击倒计时

html:

<button onclick="go()">click</button><br />
<span id="s">1000</span><br />
<span id="ss">10</span>

js:

function go() {
  let num = 1;
  let timer = setInterval(function () {
    document.getElementById('s').innerHTML -= num;
    if (document.getElementById('s').innerHTML <= 0) {
      clearInterval(timer)
    }
  }, 10)
  let num2 = 1;
  let timer2 = setInterval(function () {
    document.getElementById('ss').innerHTML -= num2;
  }, 1000)
}