Hide scrollable content behind transparent fixed position divs when scrolling the page?

Question

I have a div called header that is set up with a fixed position. The problem is when I scroll the page the content of the page shows up behind the header (the header is tran

Answer 1

I was having a similar issue, and found a solution for my case. It should apply whether you are using a full screen background image, or a solid color (including white).

HTML

<div id="full-size-background"></div>
 <div id="header">
  <p>Some text that should be fixed to the top</p>
</div>
<div id="body-text">
  <p>Some text that should be scrollable</p>
</div>

CSS

#full-size-background {
z-index:-1;
background-image:url(image.jpg);
background-position:fixed;
position:fixed;
top:0px;
left:0px;
width:100%;
height:100%;
}
#header {
position:fixed;
background-image:url(image.jpg);
height:150px;
width:100%;
}
#body-text {
margin-top:150px;
}

This gives me the look of a full page image with a transparent fixed header and when the body content scrolls, it hides behind the header. The images appear seamless.

You could do the same thing with a solid color background, though, arguably, it would have been easier.

2 notes: the header has a set height, I have only tested in FF and Chrome.

Answer 2

I fixed this problem using the background property with a color, you can use var even if you'd like to

.header{
    width:100%;
    position:fixed;
    z-index:10;
    background:blue;
    /* background: var(--my-var-value);  You can do this if needed*/
}

Answer 3

The header's z-index is set to 1000, so the z-index of the container would have to be 1001 if you want it to stack on top of the header. https://codepen.io/richiegarcia/pen/OJypzrL

#header {
    margin:0 auto;
    position: fixed;
    width:100%;
    z-index:1000;
}
#topmenu {
    background-color:#0000FF;
    height:24px;
    filter: alpha(opacity=50);
    opacity: 0.5;
}

#leftlinks {
    padding: 4px;
    padding-left: 10px;
    float: left;
}

#rightlinks {
    padding: 4px;
    padding-right: 10px;
    float: right;
}

#containerfixedtop {
    width: 100%;
    height: 20px;
}

#contentfixedtop {
    margin: 0 auto;
    background-color: #DAA520;
    width: 960px;
    height:20px;
}

#container {
    position: relative;
    top: 68px;
    width: 100%;
    height: 2000px;
    overflow: auto;
    z-index:1001;
}

#content {
    margin: 0 auto;
    background-color: #DAA520;
    width: 960px;
    height: 2000px;
}

Answer 4

1. I have fixed background image
2. The header background is transparent
3. I don't want my content to override my transparent header

I came up with a solution scrolling the div instead the body:

<div>
    <div class="header"></div>
    <div class="content"></div>
</div>


.header { position: fixed; ... }
.content { position: fixed; height: calc(100% - HEADER_HEIGHT); overflow: scroll; }

Answer 5

Does #header have a set height?

#header {position: fixed; height: 100px; }
#container {position: absolute; top: 100px; bottom: 0; overflow: auto; }

Pretty sure this wouldn't work in IE though...

Answer 6

You are probably looking for z-index. It allows you to specify the vertical order of elements on the page, so an element with z-index: 10 is floating above (visually) an element with z-index: 5.

Give the content z-index: 5 and see if it works.