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Position: Fixed - two divs (on inside the other) both fixed
internal one fills the external one |
Mike521
#:3626716
| 8:33 pm on April 14, 2008 (utc 0) |
Just to experiment with position fixed, I created a blank page with two divs, each fixed. They basically should be 90% of the size of their container. I put the 2nd div inside the 1st one. That would lead me to believe that the 2nd one would be 90% of the width of the 1st one. Problem is, the 2nd div is 100% the size of the first one, and it completely covers it up. Am I missing something? <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<style type="text/css"> #floatBox {
position: fixed;
top: 1%;
left: 5%;
width: 90%;
height: 90%;
overflow: scroll;
background-color:#CCFFFF;
border: 1px solid #003399;
} body {
height: 100%;
} </style>
</head>
<body> <p>this is some normal content.</p> <div class="floatBox"><p>this is some floated content.</p> <div class="floatBox"><p> this is some more floated content, within the other floated content.</p>
</div>
</div> </body>
</html>
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Robin_reala
#:3627271
| 11:58 am on April 15, 2008 (utc 0) |
As surprising as it might seem, this is expected behaviour (at least for CSS2.1): http://www.w3.org/TR/CSS21/visuren.html#fixed-positioning | Fixed positioning is a subcategory of absolute positioning. The only difference is that for a fixed positioned box, the containing block is established by the viewport. |
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[edited by: Robin_reala at 11:58 am (utc) on April 15, 2008]
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Mike521
#:3627316
| 1:17 pm on April 15, 2008 (utc 0) |
hmph very interesting. can't say I love that but I'll work something out, thanks for the info!
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Robin_reala
#:3627352
| 1:56 pm on April 15, 2008 (utc 0) |
I'm not quite sure what the behaviour you're expecting from having a fixed box inside a fixed box is. If it's simply for them both to be fixed with respect to the viewport then the inner one doesn't have to be fixed; it'll simply stay inside the fixed parent.
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Mike521
#:3630185
| 8:28 pm on April 18, 2008 (utc 0) |
that was just a test, I'm not using it for real actually what I'm really using is an absolute box within an absolute box that's scrollable. I'd like to update the internal box to be position:fixed so that if the container is scrolled, the internal box still shows up where I want. since position fixed takes it's size and location from the viewport, that'll be much more difficult
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