<!DOCTYPE html> <html> <body> <h1>Element 对象</h1> <h2>lastElementChild 属性</h2> <select id="mySelect" size="5"> <option>Audi</option> <option>BMW</option> <option>Saab</option> <option>Volvo</option> </select> <br><br> <p>select 元素的最后一个子元素的文本是:</p> <p id="demo"></p> <script> const element = document.getElementById("mySelect"); document.getElementById("demo").innerHTML = element.lastElementChild.text; </script> </body> </html>