问题
Imagine:
<div class="outer">
<div class="inner">
</div>
</div>
Where:
.outer
is part of a column structure, and its width is a percentile and therefore fluid..inner
represents afixed
position element that should fill with a 100% width the.outer
element. However its position vertically remains the same, thereforefixed
.
I’ve tried to implement this layout with the following CSS:
.outer {
position: relative;
width: %;
}
.inner {
position: fixed;
width: 100%;
}
However, .inner
does not calculate its width as a percentage of its relative
parent. Instead it fills the full width of the window/document. Attempting any left
or right
properties result in the same parent-ignoring qualities.
Is there any way around this?
回答1:
.outer {
position: relative;
width: %;
}
.inner {
position: fixed;
width: inherit;
}
That should do the trick.
回答2:
position: fixed
is always relative to the window/browser, thus it cannot be used to solve your problem. Fixed positioning removes the element from the natural order of the DOM, and thus does not remain within your outer div anymore, hence why it takes the full width of the browser and not of your container. What you need to use is position: absolute
to place .inner
relative to .outer
. You'll be able to position your element as well as have its width be contained by the .outer
div.
回答3:
Use this :
.inner { position: fixed; left:0; right:0;
}
回答4:
Fixed elements take only absolute values as width. If your parent container is fluid (width is a percentage), you need to set the width of the fixed element dynamically. You need to get the width of the wrapping container and set it on the sticky element.
CSS
.outer {width: 25%;}
.inner {position: fixed;}
JS
var fixedWidth = $('.outer').css('width');
$('.inner').css('width', fixedWidth);
Additionally, you can add an event listener in case window resizes.
JS
window.addEventListener('resize', resize);
function resize() {
var fixedWidth = $('.outer').css('width');
$('.inner').css('width', fixedWidth);
}
回答5:
You can take a look at this jsfiddle that i made that illustrates the fix for your problem, you can use this code exactly as it does what you want.
回答6:
position:fixed
is always relative to viewport/browser window, not to ancestors.
回答7:
What about using something like this fiddle ?
.outer {
width: 20%;
height: 1200px;
margin-left: 5%;
float: left;
}
.inner {
height: 200px;
position: fixed;
top: 0;
background: orange;
right: 75%;
left: 5%;
}
来源:https://stackoverflow.com/questions/12253803/fluid-width-fixed-position