菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<textarea id="myTextarea">
Runoob</textarea>

<p>点击按钮获取 textarea 元素的高度。</p>

<button type="button" onclick="myFunction()">点我</button>

<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("myTextarea").style.height = "250px";
}
</script>

</body>
</html>
              