scroll-behavior属性：滚动框指定滚动行为及锚点
葛驰
1、scroll-behavior属性：auto（滚动条立即滚动） / smooth（窗口平稳滚动） / inherit / initial / unset
2、锚点
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>锚点平滑跳转</title>
<style>
*{
margin: 0;
padding: 0;
}
html{
scroll-behavior: smooth;
}
nav{
width: 50%;
height: 50px;
text-align: center;
position: fixed;
left: 50%;
transform: translateX(-50%);
top: 0;
background: green;
}
nav a{
display: inline-block;
line-height: 50px;
color: #FFF;
text-decoration: none;
padding: 0 30px;
}
.box{
width: 100%;
text-align: center;
font-size: 30px;
color: #FFF;
}
#box1{
background: #d00;
}
#box2{
background: #42a4ff;
}
#box3{
background: #008080;
}
</style>
</head>
<body>
<nav>
<a href="#box1">box1</a>
<a href="#box2">box2</a>
<a href="#box3">box3</a>
</nav>
<div id="box1" class=" box">box1</div>
<div id="box2" class=" box">box2</div>
<div id="box3" class=" box">box3</div>
<script>
onload = function(){
const _Height = document.documentElement.clientHeight;
const Box = document.getElementsByClassName('box');
for (var i=0;i<Box.length;i++){
Box[i].style.height = _Height + 'px'
Box[i].style.lineHeight = _Height + 'px'
}
}
</script>
</body>
</html>
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