​x
 
<!DOCTYPE html>
<html>
<body>
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<h1>Element 对象</h1>
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<h2>lastChild 属性</h2>
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<p>点击按钮可获取 select 元素最后一个子节点的文本。</p>
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<select id="mySelect" size="5"><option>Audi</option><option>BMW</option><option>Saab</option><option>Volvo</option></select><br><br>
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<button onclick="myFunction()">试一试</button>
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<p id="demo"></p>
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<script>
function myFunction() {
  let text = document.getElementById("mySelect").lastChild.text;
  document.getElementById("demo").innerHTML = text;
}
</script>
​
</body>
</html>
​