In the below HTML and CSS I created a header and an image-animation which you can also find in the JSfiddle here:
body {
margin: 0;
}
/* 01.00 HEADER: Items in header */
.header_01 {
width: 80%;
height: 10vh;
position: absolute;
margin: auto;
top: 0;
left: 0;
right: 0;
z-index:99;
text-align: center;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
background-color: orange;
}
.header_02 {
width: 80%;
height: 10vh;
margin: 10vh auto 0;
position: sticky;
z-index:99;
top:0;
display: flex;
justify-content: space-between;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
background-color: yellow;
}
.image {
width: 30%;
height: 100%;
display: flex;
justify-content: center;
text-align: center;
align-items: center;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
background-color: green;
}
.navigation {
width: 70%;
height: 100%;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
background-color: aqua;
}
/* 02.00 NAVIGATION */
.navigation>ul {
height: 100%;
display: flex;
list-style: none;
margin: 0;
padding: 0;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
background-color: blue;
}
.navigation>ul>li {
width: 100%;
display: flex;
justify-content: center;
text-align: center;
align-items: center;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
}
/* 03.00 CONTENT */
.image_animation {
width: 80%;
margin-left: 10%;
margin-top: 15%;
float: left;
display: flex;
justify-content: space-between;
background-color: green;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
}
.image_list {
width: 100%;
position: relative;
background-color: red;
box-sizing: border-box;
border-style: solid;
border-width: 1px;
}
.image_list img {
width: 100%;
height: 100%;
}
.image1 {
height: 100%;
width: 100%;
float: left;
position: absolute;
}
.image2 {
height: 100%;
width: 100%;
float: left;
animation-delay: 2s;
}
.image_list div {
animation-name: animation_home_images;
animation-duration:4s;
animation-iteration-count:infinite;
animation-fill-mode: forwards;
opacity:0;
}
@keyframes animation_home_images {
50.0% {
opacity: 1
}
0%, 100%{
opacity: 0
}
}<div class="header_01">
This is our webpage.
</div>
<div class="header_02">
<div class="image">
Image
</div>
<nav class="navigation">
<ul>
<li class="button_01"> 1.0 Main Menu </li>
<li class="button_01"> 2.0 Main Menu </li>
<li class="button_01"> 3.0 Main Menu </li>
</ul>
</nav>
</div>
<div class="image_animation">
<div class="image_list">
<div class="image1"><img src="http://placehold.it/101x101"></div>
<div class="image2"><img src="http://placehold.it/201x201"></div>
</div>
</div>As you can see I have a header consisting of two parts. The first .header_01 should disappear once the user scrolls down the page whereas the second .header_02 should remain fixed. I originally achieved this with the answer from the question here.
All this worked fine so far.
Now I added an .image-animation below the header with a postion: absolute; property which is neccesary to make the animation work. Therefore, I also added a z-index to my CSS as described in the answers here to get the animation below the header once the user scrolls down the page.
However, somehow I cannot make the z-index work in combination with the position: sticky; property because when I scroll down both headers disappear.
Do you have any idea what I need to change in my code so once the user scrolls down:
a) the first .header_01 disappears and
b) the second .header_02 remains fixed and
c) the .image-animation goes behind the header.
