各地人口数据的折叠菜单js代码
时间: 2023-11-25 09:03:12 浏览: 123
以下是一个使用JavaScript编写的折叠菜单代码示例,用于显示各地人口数据:
HTML部分:
```html
<div class="population-menu">
<button class="accordion">北京</button>
<div class="panel">
<p>北京人口:21,500,000</p>
</div>
<button class="accordion">上海</button>
<div class="panel">
<p>上海人口:24,200,000</p>
</div>
<button class="accordion">广州</button>
<div class="panel">
<p>广州人口:14,000,000</p>
</div>
</div>
```
CSS部分:
```css
.accordion {
background-color: #eee;
color: #444;
cursor: pointer;
padding: 18px;
width: 100%;
text-align: left;
border: none;
outline: none;
transition: 0.4s;
}
.panel {
padding: 0 18px;
background-color: white;
display: none;
overflow: hidden;
}
.panel p {
margin: 0;
padding: 10px 0;
}
```
JavaScript部分:
```javascript
var accordions = document.getElementsByClassName("accordion");
for (var i = 0; i < accordions.length; i++) {
accordions[i].addEventListener("click", function() {
this.classList.toggle("active");
var panel = this.nextElementSibling;
if (panel.style.display === "block") {
panel.style.display = "none";
} else {
panel.style.display = "block";
}
});
}
```
这段代码包括了HTML、CSS和JavaScript三个部分。HTML部分定义了菜单的结构和数据,CSS部分定义了菜单的样式,JavaScript部分实现了点击按钮时展开或收起对应的人口数据面板的功能。