HTML:
<div class="logo-ribbon">
<a href="#top"></a>
</div>
<nav id="nav">
<ul>
<li class="what">
<a href="#what">what </a>
</li>
<li class="how">
<a href="#how">how </a>
</li>
<li class="projects">
<a href="#projects">projects</a>
</li>
<li class="faq">
<a href="#faq">faq</a>
</li>
<li class="contact">
<a href="#contact">contact</a>
</li>
</ul>
</nav>
JS:
$('nav li a').click(function(e) {
e.preventDefault();
$('a').removeClass('active-state-navigation');
$(this).addClass('active-state-navigation');
$('logo-ribbon a').click(function(){
$('nav li').removeClass('active-state-navigation');
});
});
我需要实现的目标如下:
一旦你点击一个菜单项就是一个经典的活跃状态..而且我已经用js的第一行实现了
我希望在页面滚动时也能触发活动状态。所以,如果我滚动,让我们说,#contact部分,活动状态更改为“联系人”菜单项
我还需要,如果我点击“.logo-ribbon a”,“有效状态导航”会在导航中的任何位置被删除。
答案 0 :(得分:3)
你的意思是卷轴?点击http://jsfiddle.net/mekwall/up4nu/
// Cache selectors
var lastId,
topMenu = $("#top-menu"),
topMenuHeight = topMenu.outerHeight()+15,
// All list items
menuItems = topMenu.find("a"),
// Anchors corresponding to menu items
scrollItems = menuItems.map(function(){
var item = $($(this).attr("href"));
if (item.length) { return item; }
});
// Bind click handler to menu items
// so we can get a fancy scroll animation
menuItems.click(function(e){
var href = $(this).attr("href"),
offsetTop = href === "#" ? 0 : $(href).offset().top-topMenuHeight+1;
$('html, body').stop().animate({
scrollTop: offsetTop
}, 300);
e.preventDefault();
});
// Bind to scroll
$(window).scroll(function(){
// Get container scroll position
var fromTop = $(this).scrollTop()+topMenuHeight;
// Get id of current scroll item
var cur = scrollItems.map(function(){
if ($(this).offset().top < fromTop)
return this;
});
// Get the id of the current element
cur = cur[cur.length-1];
var id = cur && cur.length ? cur[0].id : "";
if (lastId !== id) {
lastId = id;
// Set/remove active class
menuItems
.parent().removeClass("active")
.end().filter("[href=#"+id+"]").parent().addClass("active");
}
});