<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.content{
height: 1800px;
background-color: white;
}
.shade{
position: fixed;
top:0;
left: 0;
right: 0;
bottom: 0;
background-color: black;
opacity: 0.3;
}
.model{
width: 200px;
height:200px;
background-color: white;
position: absolute;
top:50%;
left: 50%;
margin-top: -100px;
margin-left: -100px;
}
.hide{
display: none;
}
</style>
</head>
<body>
<div class="content">
<button onclick="func()">show</button>
</div>
<div class="shade hide">
</div>
<div class="model hide">
<button onclick="cancle()">取消</button>
</div>
<script>
function func() {
var ele_shade = document.getElementsByClassName('shade')[0]
var ele_model = document.getElementsByClassName('model')[0]
ele_shade.classList.remove('hide') //class属性的删除
ele_model.classList.remove('hide')
}
function cancle() {
var ele_shade = document.getElementsByClassName('shade')[0]
var ele_model = document.getElementsByClassName('model')[0]
ele_shade.classList.add('hide')//class属性的增加
ele_model.classList.add('hide')
}
</script>
</body>
</html>
class属性
1)className
2)classList