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<!DOCTYPE html> <html> <body> <p>本例使用 HTML DOM 将 "ontoggle" 事件分配给 details 元素。</p> <p>打开 details。</p> <details id="myDetails"> <summary>Copyright 1999-2014.</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> document.getElementById("myDetails").ontoggle = function() {myFunction()}; function myFunction() { alert("The ontoggle event occured"); } </script> </body> </html>