So, I have a layout where I have a repeating transparent shadow element set to the background of my parent container element. Set atop this, and supposedly hovering over the topmost edge of this background, is supposed to be an image with a frame and drop shadow.
However, because the image frame continues the parent element, the background image also continues upward. This is visible as the vertical lines above the top edge of the frame's drop shadow. See screenshot below:
This happens regardless if I use a transparent image or CSS3's box-shadow property. Setting negative margins doesn't work to bring it out of the parent element, nor does setting positioning as relative or absolute.
Normally I'd try to "fake" the transparency effect by setting a solid image at the top edge of the image frame, but there's a repeating stucco pattern set as the body background, which means there'd be a visible, unnatural-looking edge. (Insert cursing re: repeating patterns here.)
Any suggestions how I could prevent a parent element's background from showing through a child element, or offsetting the image frame somehow?
Many thanks!
I figured it out.
I was modifying the WordPress TwentyEleven theme, which has #primary and #secondary divs as floats atop the main content div. In order to make the background extend all the way to the bottom of the content div (I.e., past the two floats), I had overflow: set to auto.
Since I don't need to float anything (It's one column with no sidebar now), I removed both floats and removed the overflow declaration I had. Tah-dah, totally works now.
If someone else finds him/herself in this issue, have a look at my jsFiddle, which I used to figure it out. Thanks to Paker for the suggestion.
Related
UPDATE
To get the input back to the size I want it to be, I had to get rid of padding and borders. The following accomplished this:
*{padding:0; margin:0; border:0;}
Thanks to CBroe, I discovered this is unique to FF which adds to the input a default border of .75px and a padding of 1.5px. For a total of about 4.5px. Chrome does not.
UPDATE 2
The above fix only gets the child element back to the size I thought it should be. The accepted answer below shows that FF has a bug which explains why the outline didn't behave as it should, which is to outline the parent only and not expand for absolute positioned descendents.
I have two div elements stacked vertically with their outline property set to 1px. The div elements have a height of 117px.
I expect where the two div elements meet to have their outlines contiguous. It does so with no content.
When I place an absolute positioned input with top = 97px and height = 20px into the top div , the outline of that div is pushed down.
Here is a fiddle which shows this. If you remove the input, you will see how the top div outline sits next to the bottom div.
There are two things (at least) that I do not understand:
1) In examining the box using the browser's dev tools (Firefox), I see that the top div is in fact still 117px high. The outline should be drawn around the div, but appears not to be. Why?
2) The input has a top of 97px plus a height of 20px. Why would this affect the position of the outline? It looks like the outline is pushed down 4px.
That's because outlines are implementation dependent. It's not only the size:
Outlines may be non-rectangular.
From CSS3 UI,
This specification does not define the exact position or shape of the
outline, but it is typically drawn immediately outside the border box.
Firefox has historically had a tendency of making outlines bigger in various situations, e.g.
outlines are drawn outside (i.e., expanded by) box-shadow and other visual overflow
outlines are drawn outside (expanded by) outlines on descendant elements
The former was fixed, the latter seems the same as your problem.
I've 2 answers for you:
1) In examining the box using the browser's dev tools (Firefox), I see that the top div is in fact still 117px high. The outline should be drawn around the div, but appears not to be. Why?
The outline appears to be drawn around everything inside. So if an element stand out 100px at the bottom. The outline will also be moved 100px. In this case the input element stands out 8px. So the outline is 8px longer than you expected.
The input has a top of 97px plus a height of 20px. Why would this affect the position of the outline? It looks like the outline is pushed down 4px.
You were almost right there, 97px+20px is indeed 117px height. But you forgot to count 8px from the input element. This comes from a 3px thick border + 1px thick padding.
I have to add a small banner at the top of a page and am having trouble with pushing the existing content down 40px so I can fit in the banner above.
The current layout has a lot of strangley positioned elements and they all keep moving out of place if I wrap the whole body area in a relative block div with a top margin.
Is there a technique that should work for this other than wrapping in a div like this?
If you do this, then you have to be careful that your CSS positioning on the divs that you want to move is not absolute. Because if it is, then they will just stay where they are. It should however, work if you add a div that encompasses everything and put a few pixels of padding on the top with CSS.
Why not just put a at the top of the page and set that div to clear:both afterwards. This should shift the rest of the page down 40px, or whatever you set the height of that div to. Of course, I'm just guessing here without looking at code and/or a sample site. Since I assume by strangely positioned you mean weird usage of position:absolute, this should allow your current setup to remain consistent.
I have a list of items, like a menu, where the current item has a background image that is kind of like a big pointer to the right. This background image pointer thing should escape the bounding box of the div it's contained within. Here is a screenshot of how it appears in Chrome and FF, which is as i expected it to appear:
I've set up a jsfiddle with the code, minus the background image thing as I can't be bothered uploading it anywhere. But I've set the background colour so you can see what I'm referring to
The code is here: http://jsfiddle.net/V8TNm/
So in Chrome and FF, the yellow background of the active item will stretch past the grey gradient box. But in IE9, it's cut off.
Any ideas why, and what an easy fix may be?
Simply add position:relative.
#nav_mod_list div.current {
position: relative;
}
http://jsfiddle.net/V8TNm/3/
The selector #nav_mod_list div.current has a width of 210px as well as padding and margin where as the container is 200px. Change the 210 to 200 and remove the margin and padding.
Edit:
You could also just remove width property altogether. That way it will simply extend the width of the container.
Is there a way to make an element not contribute to parent overflow, but keep it visible? Let me clarify
There is a watermark-like logo to be applied to a page in the manner below. It is supposed to be positioned partly outside the main content (dashed blue line)
I'm not aware of the option to set an element background in such a manner that it would persist as the browser window is resized horizontally, so I've just added a <div> with the logo as its background and position:absolute with the necessary offset relative to main content container.
Previously, the page would not get a horizontal scrollbar as long as the browser was wider than W1. Now, with an additional "watermark" element added outside of the main content box, the scrollbar would appear whenever the browser is narrower than W2
Is there something obvious I'm missing? A background setting, or possibly a neat margin workaround/
Update:
I've added a rough jsfiddle to illustrate the issue
Unfortunately, just because you nested the "watermark" div and positioned it absolutely doesn't make it outside of the document. If you put it outside of the document, the page will scroll (as you see).
To me, the first solution I think of is to move the watermark outside of the "content" div and apply the watermark to its parent container. I'm guessing you haven't done that because you need it to be relative to the "content" div, but it's something to try.
Also, the reason it scrolls is because the document has been overflow. The quick fix, yet not recommended, is to use "overflow-x: hidden;" on the parent container of the "content" div.
It's harder to give you a solution since you've stripped the rest of your HTML, and some "fixes" may not be as applicable if your structure is complicated in certain ways.
Remember that the width of your elements is greater than the actual "width" it includes padding & margins, if you have padding on your div reduce the "width" by the equivalent amount.
does that make sense? if you post the actual css & html it might be easier to give you a more detailed answer
additionally could you not assign the image as the background of the actual body element and set it to centered?
I've had a play with the code and come up with a possible solution for you.
set
body{overflow-x:hidden;}
then add
#media all and (max-width: 400px)
{
body{overflow-x:auto; }
}
as soon as your screen is smaller than 400px (the width of the div) your overflow:hidden will be overridden and you'll be given you scroll bars.
at this point you may also want to reduce the width of your watermark.
Setting max-width and max-height to 100% for an image does what's intended and scales the image to fit it's container with aspect-ratio intact. However, I need to achieve the same thing but with an extra container kept tight around the image (to be able to position other stuff relative to the image).
I'm looking for non-JS solutions and mark-up semantics is not an issue since this is for an app. (tables would be ok). Also image dimensions can be considered known.
Another way to describe what I want: Make an image always fit inside the body and display a border around it (not using the trivial solution of putting a border on the image itself)
Here is a fiddle showing the problem. I gave the image an 0.5 opacity to make the yellow container show through. The objective is to have the container always the same size as the image. Ie. the image will always have a yellow tint but no other yellow areas should be visible. Note: I'm not trying to achieve any coloring effects it's just an illustration of the problem.
Try this one, http://jsfiddle.net/xmarcos/K4dHr/
Update: http://jsfiddle.net/xmarcos/K4dHr/4/
Here, this seems to work: http://jsfiddle.net/Wexcode/vzc4m/1/
You don't need to have a max-height around your <div> because it will stretch to the dimensions of its inner elements if you set it as display: inline-block. Forcing the <img> to have display: block will ensure that there isn't any extra space added around element inside container, unless you specify it (using margin).