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>

<h1 style="color: red; font-size: 50px;  ">循环输出所有 CSS 属性</h1>

<p>点击按钮显示所有 h1 元素的 CSS 属性。</p>

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

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

<script>
function myFunction() {
  var elmnt, i, txt = "";
  elmnt = document.getElementsByTagName("h1")[0];
  for (i = 0; i < elmnt.style.length; i++) {
    txt += elmnt.style.item(i) + "<br>";
  }
  document.getElementById("demo").innerHTML += txt;
}
</script>

</body>
</html>
              