​x
 
<!DOCTYPE html>
<html>
<body>
​
<ol id="myOl">
  <li>咖啡</li>
  <li>绿茶</li>
  <li>牛奶</li>
  <li>果汁</li>
  <li>纯水</li>
</ol>
​
<p>单击该按钮可查看列表顺序是否是降序。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var x = document.getElementById("myOl").reversed;
  document.getElementById("demo").innerHTML = x;
}
</script>
​
</body>
</html>
​