效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.button {
position: relative;
z-index: 10;
font-size: 30px;
text-indent: 14px;
width: 50px;
height: 50px;
background-color: #999;
line-height: 45px;
transition: all .5s;
user-select: none;
}
* {
list-style: none;
}
.list {
position: relative;
display: inline-block;
width: 50px;
height: 100%;
left: 0;
margin: 0;
padding: 0;
background-color: #999;
overflow: hidden;
transition: all .5s;
}
.hide {
left: -100px;
}
body {
transition: all .5s;
}
</style>
</head>
<body>
<div class="box">
<div class="button">+</div>
<div class="menu">
<ul class="list hide">
<li>第一个</li>
<li>第二个</li>
<li>第三个</li>
<li>第四个</li>
<li>第一个</li>
<li>第二个</li>
<li>第三个</li>
<li>第四个</li>
<li>第一个</li>
<li>第二个</li>
<li>第三个</li>
<li>第四个</li>
<li>第一个</li>
<li>第二个</li>
<li>第三个</li>
<li>第四个</li>
<li>第一个</li>
<li>第二个</li>
<li>第三个</li>
<li>第四个</li>
</ul>
</div>
<span id="deng">点我关灯</span>
</div>
<script>
var deng = document.querySelector("#deng");
var bd = document.querySelector("body");
var lst = document.querySelector('.list');
var btn = document.querySelector(".button");
deng.onclick = function() {
if (this.innerText === '点我开灯') {
this.style.color = "black";
this.innerText = '点我关灯';
bd.style.backgroundColor = "white";
} else {
this.style.color = "white";
this.innerText = '点我开灯';
bd.style.backgroundColor = "black";
}
}
btn.onclick = function() {
if (this.style.transform === 'rotate(-180deg)') {
this.style.transform = 'rotate(0deg)';
lst.className = 'list hide';
} else {
this.style.transform = 'rotate(-180deg)'
lst.className = 'list';
}
}
</script>
</body>
</html>