菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>菜鸟教程(runoob.com)</title>
<style>
/* 打开和关闭手风琴面板的样式 */
.accordion {
  background-color: #eee;
  color: #444;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  text-align: left;
  border: none;
  outline: none;
  transition: 0.4s;
}
 
/* 设置点击和鼠标移到选项上面时（悬停）的样式 */
.active, .accordion:hover {
  background-color: #ccc;
}
 
/* 为手风琴面板设计样式。 默认隐藏 */
.panel {
  padding: 0 18px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}
/* 设置 +、- 标志 */
.accordion:after {
  content: '\002B';  /* Unicode 字符 + 号 */
  color: #777;
  font-weight: bold;
  float: right;
  margin-left: 5px;
}
 
.active:after { 
  content: "\2212";  /* Unicode 字符 - 号 */
}
</style>
</head>
<body>

<h2>手风琴动画</h2>
<p>电脑按钮显示或隐藏内容</p>

<button class="accordion">Runoob 1</button>
<div class="panel">
  <p>菜鸟教程 -- 学的不仅是技术，更是梦想！！！</p>
</div>
 
<button class="accordion">Runoob 2</button>
<div class="panel">
  <p>菜鸟教程 -- 学的不仅是技术，更是梦想！！！</p>
</div>
 
<button class="accordion">Runoob 3</button>
<div class="panel">
  <p>菜鸟教程 -- 学的不仅是技术，更是梦想！！！</p>
</div>

<script>
var acc = document.getElementsByClassName("accordion");
var i;

for (i = 0; i < acc.length; i++) {
    acc[i].addEventListener("click", function() {
    this.classList.toggle("active");
    var panel = this.nextElementSibling;
    if (panel.style.maxHeight) {
      panel.style.maxHeight = null;
    } else {
      panel.style.maxHeight = panel.scrollHeight + "px";
    } 
  });
}
</script>

</body>
</html>
              