Jquery 如何使导航栏在向下滚动页面时改变颜色?
我希望导航栏是透明的,但是当你向下滚动页面时,它会变成红色Jquery 如何使导航栏在向下滚动页面时改变颜色?,jquery,nav,Jquery,Nav,我希望导航栏是透明的,但是当你向下滚动页面时,它会变成红色 <div class="nav"> <div class="container"> <div class="logo"> <a href="#"><img src="RepublicSquare_logo.svg" style="height: 80px;"></a> </div> &
<div class="nav">
<div class="container">
<div class="logo">
<a href="#"><img src="RepublicSquare_logo.svg" style="height: 80px;"></a>
</div>
<div class="navMain">
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Services</a></li>
<li><a href="#">Portfolio</a></li>
<li><a href="#">Contact</a></li>
</ul>
</div>
</div>
</div>
类似这样的内容:
如果有人想寻找非jquery解决方案(vanilla js),请看以下内容:
document.addEventListener("DOMContentLoaded", function () {
var scrollStart = 0;
var nav = document.querySelector(".nav");
var offset = navbarElement.getBoundingClientRect();
document.onscroll = function (e) {
scrollStart = e.target.scrollingElement.scrollTop;
if (scrollStart > offset.top) {
nav.style.background-color, rgba(34,34,34,0.9);
} else {
nav.style.background-color = "transparent";
}
};
});
解决方案由OP
Jquery
$(document).ready(function(){
var scroll_start = 0;
var startchange = $('.nav');
var offset = startchange.offset();
$(document).scroll(function() {
scroll_start = $(this).scrollTop();
if(scroll_start > offset.top) {
$('.nav').css('background-color', 'rgba(34,34,34,0.9)');
} else {
$('.nav').css('background-color', 'transparent');
}
});
});
CSS
这将使您的导航变得透明,当您滚动时,导航将变为rgba(34,34,34,0.9)谢谢。您知道如何使其褪色而不仅仅是显示吗?添加CSS转换属性,如下所示:。如果我的答案有用的话,请把它标记为正确。谢谢你花时间回答这个问题。我在Jquery:$(document).ready(function(){var scroll\u start=0;var startchange=$('.nav');var offset=startchange.offset();$(document).scroll(function(){scroll\u start=$(this).scroll top();if(scroll\u start>offset.top){$('.nav').css('background-color','rgba(34,34,34,0.9);}else{$('.nav').css('background-color','transparent');}}});很抱歉,我不能投票支持你的答案,它说我没有15岁的声誉。但我非常感谢你的时间和帮助。很抱歉,我发布了jsfiddle链接,但我忘了保存更改。检查此链接:
$(document).ready(function(){
var scroll_start = 0;
var startchange = $('.nav');
var offset = startchange.offset();
$(document).scroll(function() {
scroll_start = $(this).scrollTop();
if(scroll_start > offset.top) {
$('.nav').css('background-color', 'rgba(34,34,34,0.9)');
} else {
$('.nav').css('background-color', 'transparent');
}
});
});
.nav {
transition-duration: 1s;
}