我试图通过添加活动类来突出显示页面滚动导航。
这是我的脚本(我从这里https://codepen.io/joxmar/pen/NqqMEg处获得):
<style name="Theme.Default" parent="Theme.AppCompat.Light.NoActionBar">
<!-- these should be the correct ones -->
<item name="NavAction_enterAnim">@anim/default_enter_anim</item>
<item name="NavAction_exitAnim">@anim/default_exit_anim</item>
<item name="NavAction_popEnterAnim">@anim/default_pop_enter_anim</item>
<item name="NavAction_popExitAnim">@anim/default_pop_exit_anim</item>
</style>
我在控制台中收到以下错误: 未捕获的错误:语法错误,无法识别的表达式:[href =#]
我正在使用jquery-3.3.1.min.js
编辑:更新-我不再遇到错误,但是它不起作用。我在变量formTop上做了一个控制台日志,并且得到了NaN
答案 0 :(得分:1)
您应该在引号中添加引号。
您的代码:
("[href=#"+id+"]")
应为:
("[href='#"+id+"']")
// Cache selectors
var lastId,
topMenu = $("#mainNav"),
topMenuHeight = topMenu.outerHeight()+1,
// 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
}, 850);
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");
}
});
nav {
position: fixed;
top: 0;
left: 0;
background: #55443D;
height: 40px;
width: 100%;
z-index: 1;
}
nav ul {
margin: 0;
padding: 0;
list-style: none;
position: relative;
display: table;
margin: 0 auto;
}
nav ul li {
display: table-cell;
}
nav ul li a {
padding: 10px 20px;
display: block;
color: white;
text-decoration: none;
transition: all 0.3s ease-in-out;
}
nav ul li a:hover {
color: #F38A8A;
}
nav ul .active a {
color: #F38A8A;
border-bottom: 3px solid #F38A8A;
}
section {
height: 100vh;
position: relative;
margin: 0;
padding: 0;
display: block;
z-index: 0;
}
#home {
background: #A0CAB5;
top: 40px;
}
#work {
background: #CDE9CA;
}
#about {
background: #F1EDD0;
}
#contact {
background: #F38A8A;
}
h2 {
padding: 0;
margin: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<nav>
<ul id="mainNav">
<li class="active"><a href="#home">Home</a></li>
<li><a href="#work">Work</a></li>
<li><a href="#about">About</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
</nav>
<section id="home"><h2>Home</h2></section>
<section id="work" data-sr><h2>Work</h2></section>
<section id="about"><h2>About</h2></section>
<section id="contact"><h2>Contact</h2></section>
答案 1 :(得分:-1)
codepen的“ pen”对此发表评论:
美丽。感谢您分享您的工作。为了避免与某些版本的jQuery发生冲突,最后一个字符串需要替换为:
.end().filter( '[href="#' + id + '"]' ).parent().addClass( "active" );
您的回应可能是一些利特尔空间!