​x
 
<!DOCTYPE html>
<html>
<body>
打开详情。
<p>打开 details。</p>
​
<details ontoggle="myFunction()">
<summary>Copyright 2006-2021.</summary>
<p> - by W3School. All Rights Reserved.</p>
<p>All content and graphics on this web site are the property of W3School.</p>
</details>
​
<script>
function myFunction() {
  alert("The ontoggle event occured");
}
</script>
​
</body>
</html>
​