我已经尝试了一段时间寻找解决方案。
因此它开始透明,然后当我滚动一定长度时,它会变为具有背景颜色。下面的代码是我到目前为止的代码
CSS文件
header {
padding-top: 10px;
background-color: transparent;
color: white;
position: fixed;
width: 100%;
z-index: 1;
}
.changeColor {
background-color: rgba(30, 32, 35, 0.9);
}
HTML文件底部的脚本标签中的JS
var scroll_distance = 100;
var transparent = true;
document.addEventListener("scroll", function(){
if($(document).scrollTop() > scroll_distance ) {
if(transparent) {
transparent = false;
$('header').removeClass('changeColor');
}
} else {
if( !transparent ) {
transparent = true;
$('header').addClass('changeColor');
}
}
});
window.addEventListener("scroll", function(){
if($(document).scrollTop() > scroll_distance ) {
if(transparent) {
transparent = false;
$('header').removeClass('changeColor');
}
} else {
if( !transparent ) {
transparent = true;
$('header').addClass('changeColor');
}
}
});
HTML文件
<header id="headernavbar">
...
</header>
有关如何执行此操作的任何提示?我尝试使用JQuery但结果相同。它根本没有添加课程。在访问该网站之前我还清除了cookie和缓存,并尝试了多个浏览器而没有运气。我修复了这个问题后,我还要添加转换效果。
答案 0 :(得分:0)
你反其道而行之。没有错误,但逻辑错误。
您需要修复什么?
当document_scrolltop > scroll_distance
,添加课程时,请将其删除。
var scroll_distance = 100;
var transparent = true;
document.addEventListener("scroll", function() {
if ($(document).scrollTop() > scroll_distance) {
if (transparent) {
transparent = false;
$('header').addClass('changeColor');
}
} else {
if (!transparent) {
transparent = true;
$('header').removeClass('changeColor');
}
}
});
&#13;
header {
padding-top: 10px;
background-color: transparent;
color: black;
position: fixed;
border:2px solid;
width: 100%;
z-index: 1;
}
.changeColor {
background-color: rgba(30, 32, 35, 0.9);
transition: all 0.5s ease-in-out;
}
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<header id="headernavbar">
...
</header>
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&#13;
答案 1 :(得分:0)
也许您可以简化代码,如果将其粘贴到开发人员工具的控制台中,您可以看到它正常工作
from tkinter import *
from modules.animation import animation
root=Tk()
cosmog=animation(root,image="cosmog.gif").animate(0)
cosmoem=animation(root,image="cosmoem.gif").animate(0)
lunala=animation(root,image="lunala.gif").animate(0)
root.mainloop()