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-top: 15px solid black;
  border-left: 10px solid red;
  background-color: lightblue;
}
</style>
</head>
<body>

<p>点击按钮获取 div 元素顶部和左侧边框的宽度:</p>

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

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

<script>
function myFunction() {
  var elmnt = document.getElementById("myDIV");
  var txt = "顶部边框的宽度: " + elmnt.clientTop + "px<br>";
  txt += "左侧边框的宽度: " + elmnt.clientLeft + "px";
  document.getElementById("demo").innerHTML = txt;
}
</script>

</body>
</html>
              