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>
<style>
#myDIV {
  height: 250px;
  width: 400px;
  padding: 10px;
  margin: 15px;
  border-left: 10px solid red;
  background-color: lightblue;
  direction: rtl;
  overflow: scroll;
}
</style>
</head>
<body>

<p>点击按钮，获取左侧边框的宽度。</p>

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

<div id="myDIV">
 div 元素的文本方向是从右到左。<br>
 并且它有一个滚动条!
  <p id="demo"></p>
</div>

<script>
function myFunction() {
  var left = document.getElementById("myDIV").clientLeft;
  document.getElementById("demo").innerHTML = "左侧边框宽度: " + left + "px";
}
</script>

</body>
</html>
              