网页中的锚点如果直接跳转，会给人一种很突然的感觉，添加一个滚动的动画效果会柔和很多。
下面的js代码包含了锚点滚动，页面滚动到一定距离时锚点容器固定（参数fixed），锚点容器垂直偏移量设置（参数offset）
<!DOCTYPE html>
<html>
<head>
<title>网页锚点滚动</title>
<meta charset="utf-8">
</head>
<style>
*{margin: 0;padding: 0;font-family: "Arial";}
ul, ol{list-style: none;}
.anchor{position: absolute;top: 100px;left: 20px;width: 100px;padding-top: 20px;}
.anchor.fixed{top: 0;}
.anchor a{display: block;line-height: 50px;background: #123;border-bottom: 1px solid #fff;font-size: 24px;color: #fff;text-align: center;text-decoration: none;}
.anchor a.active{background: #fa8000;}
.elem{margin-top: 120px;}
.elem li{line-height: 50px;margin-bottom: 800px;font-size: 40px;color: #333;text-indent: 150px;}
</style>
<body>
<div class="anchor">
<a href="#anchor-1">1</a>
<a href="#anchor-2">2</a>
<a href="#anchor-3">3</a>
<a href="#anchor-4">4</a>
<a href="#anchor-5">5</a>
<a href="#anchor-6">6</a>
<a href="#anchor-7">7</a>
<a href="#anchor-8">8</a>
</div>
<ul class="elem">
<li id="anchor-1">anchor-1</li>
<li id="anchor-2">anchor-2</li>
<li id="anchor-3">anchor-3</li>
<li id="anchor-4">anchor-4</li>
<li id="anchor-5">anchor-5</li>
<li id="anchor-6">anchor-6</li>
<li id="anchor-7">anchor-7</li>
<li id="anchor-8">anchor-8</li>
</ul>
</body>
<script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.11.3/jquery.min.js"></script>
<script>
$.fn.anchorScroll = function(option) {
return this.each(function() {
var options = $.extend({
fixed: 0,
offset: 0
}, {}, typeof option === ‘object‘ && option);
var $anchorMenu = $(this),
$anchorItem = $anchorMenu.find(‘a‘),
pageIsScrolling = false;
// 点击锚点时页面滚动
$anchorItem.click(function(e) {
e.preventDefault ? e.preventDefault() : e.returnValue = false;
pageIsScrolling = true;
try {
var $target = $($(this).attr(‘href‘));
$(‘html, body‘).stop(true, false).animate({
scrollTop: $target.offset().top + options.offset
}, function() {
pageIsScrolling = false;
});
$(this).addClass(‘active‘).siblings().removeClass(‘active‘);
} catch (e) {}
});
$(window).on(‘scroll DOMContentLoaded load‘, function() {
// 固定锚点菜单
if ($(window).scrollTop() > options.fixed) {
$anchorMenu.addClass(‘fixed‘).css({
position: ‘fixed‘,
marginTop: 0,
marginBottom: 0
});
} else {
$anchorMenu.removeAttr(‘style‘).removeClass(‘fixed‘);
}
// 锚点菜单对应项添加高亮样式
if (!pageIsScrolling) {
$anchorItem.each(function() {
try {
var $target = $($(this).attr(‘href‘));
if ($(window).scrollTop() >= $target.offset().top + options.offset) {
$(this).addClass(‘active‘).siblings().removeClass(‘active‘);
}
} catch (e) {}
});
}
});
});
};
$(‘.anchor‘).anchorScroll({
fixed: 100,
offset: -20
});
</script>
</html>
时间： 2024-12-27 12:08:02