我已经在我的网站上实现了CSS Tricks Smooth Page Scroll,它运行得非常好。但是,因为我在页面顶部有一个固定的导航,所以当页面滚动到适当的锚 div 时,div 的顶部会消失在导航的后面。如何偏移滚动(大约 70 像素)以便显示整个 div?我试过这样做:
var targetOffset = $target.offset().top - 70;
但这并不完全奏效。页面滚动到适当的位置,但随后它立即跳回以隐藏 div 的顶部。我错过了什么?这是完整的代码:
$(function() {
function filterPath(string) {
return string
.replace(/^\//,'')
.replace(/(index|default).[a-zA-Z]{3,4}$/,'')
.replace(/\/$/,'');
}
var locationPath = filterPath(location.pathname);
var scrollElem = scrollableElement('html', 'body');
// Any links with hash tags in them (can't do ^= because of fully qualified URL potential)
$('a[href*=#]').each(function() {
// Ensure it's a same-page link
var thisPath = filterPath(this.pathname) || locationPath;
if ( locationPath == thisPath
&& (location.hostname == this.hostname || !this.hostname)
&& this.hash.replace(/#/,'') ) {
// Ensure target exists
var $target = $(this.hash), target = this.hash;
if (target) {
// Find location of target
var targetOffset = $target.offset().top - 70;
$(this).click(function(event) {
// Prevent jump-down
event.preventDefault();
// Animate to target
$(scrollElem).animate({scrollTop: targetOffset}, 400, function() {
// Set hash in URL after animation successful
location.hash = target;
});
});
}
}
});
// Use the first element that is "scrollable" (cross-browser fix?)
function scrollableElement(els) {
for (var i = 0, argLength = arguments.length; i <argLength; i++) {
var el = arguments[i],
$scrollElement = $(el);
if ($scrollElement.scrollTop()> 0) {
return el;
} else {
$scrollElement.scrollTop(1);
var isScrollable = $scrollElement.scrollTop()> 0;
$scrollElement.scrollTop(0);
if (isScrollable) {
return el;
}
}
}
return [];
}
});
在此先感谢您的帮助。