<!DOCTYPE html> <html> <body> <p>Example list:</p> <ul> <li id="myLI">Coffee</li> <li>Tea</li> </ul> <p>单击该按钮可获取列表中 li 元素的父元素的节点名称。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myLI").parentElement.nodeName; document.getElementById("demo").innerHTML = x; } </script> </body> </html>