The question is: is it possible? I have a div with relative position. Inside this div, I have another div with position: absolute and top: whatever.
This absolute positioned div overlaps content in parent div without any problems, but another relative position div (outside parent) doesn't even care. Before this question I googled as I much as I could, so I'm for 90% sure that it's impossible, or I'm on a wrong way, but I need to be sure.
Here is an example http://jsfiddle.net/MNLbZ/2/
HTML
<div class="main">
<div class="content">11112222233</div>
<div class="abs"></div>
</div>
<div class="main"></div>
CSS
.main {
background: green;
position: relative;
height: 100px;
width: 100px;
z-index: 100;
}
.content {
position: relative;
z-index: 500;
width: 100px;
}
.abs {
position: absolute;
width: 50px;
height: 300px;
top:0;
right: 0;
background: red;
z-index: 999;
opacity: .5;
}
The z-index of the second .main div must be lower than that of the first div that contains the absolute div:
add a class to the second main
<div class="main">
<div class="content">11112222233</div>
<div class="abs"></div>
</div>
<div class="main second"></div>
then use this style:
.second {z-index:99;}
Example
Related
I'm curious whether it's possible with CSS to have a <div> overlaying the <div> above and below, like so:
I've tried to use margin-top: -40px;, but that doesn't seem to work. I've tried position:relative; without any luck, either. Any ideas?
Thanks!
Sure!
Demo Fiddle
The trick is managing the positioning of your divs, then setting the offset (top) correctly for the div you want overlapping.
<div></div>
<div>
<div></div>
</div>
CSS
div {
width:100%;
height:100px;
position:relative; /* ensure the parent divs have a position set */
}
div:first-child {
background:red;
}
div:last-child {
background:blue;
}
div:last-child div {
opacity:.5;
height:50px;
background:white;
position:absolute; /* position relative to the parent */
top:-25px; /* position the top to -25px (half its height) above the top of the parent */
}
There are many ways to do this:
With all div's absolutely positioned
You can use position: absolute to achieve this. This is better if you are trying to build a web app as it sticks to the edges of the screen.
Fiddle here
HTML
<div id="top-section"></div>
<div id="banner-section"></div>
<div id="btm-section"></div>
CSS
div {
position: absolute;
left: 0;
width: 100%;
}
#top-section {
top: 0;
bottom: 50%;
background: red;
}
#btm-section {
top: 50%;
bottom: 0;
background: blue;
}
#banner-section {
height: 100px;
margin-top: -50px;
top: 50%;
background: rgba(255,255,255,0.5);
z-index: 2;
}
With the #banner-section relatively positioned
You mentioned that you tried relative position. This is how you can achieve what you were trying to do. In this case, you want the #banner-section to be nested inside the #btm-section:
Fiddle here
HTML
<div id="top-section"></div>
<div id="btm-section">
<div id="banner-section"></div>
</div>
CSS
#banner-section {
position: relative;
top: -50px;
height: 100px;
background: rgba(255,255,255,0.5);
}
With a negative margin on #banner-section
You also mentioned that you tried using a negative value for the margin-top. Here is a working example of that:
Fiddle here
HTML
(Also nested)
<div id="top-section"></div>
<div id="btm-section">
<div id="banner-section"></div>
</div>
CSS
#banner-section {
margin-top: -50px;
height: 100px;
background: rgba(255,255,255,0.5);
}
You can also have it poking out of the top section
If the #top-section is static and the bottom section can extend past the bottom of the page, this might be the best option for you.
Fiddle here
HTML
<div id="top-section">
<div id="banner-section"></div>
</div>
<div id="btm-section"></div>
CSS
#banner-section {
position: absolute;
bottom: -50px;
z-index: 2;
height: 100px;
background: rgba(255,255,255,0.5);
}
Without further details you can do it as follows:
JSFiddle Example
HTML
<div class="top-section"></div>
<div class="banner-section"></div>
<div class="btm-section"></div>
CSS
.top-section{
height:60px;
background-color:red;
}
.btm-section{
height:60px;
background-color:blue;
}
.banner-section{
position:absolute;
z-index:1;
margin-top:-20px;
height:40px;
width:100%;
background-color:rgba(255,255,255,0.5);
}
End Result
The trick here is to have the middle div banner-section positioned absolutly, and with a margin-top value negative corresponding to half its height, giving us this end result:
Explanation
Since the element with the CSS class .banner-section gets positioned absolutely, it will rise above in the document stack order. So the elements .top-section and .btm-section stay one after the other.
An element with position:absolute will then need some extra css to keep up with the desirable appearence, like a width declaration and a height declaration to set its size.
Check if this one helps you
http://codepen.io/anon/pen/EJBCi.
<div class="outer">
<div class="topSec"></div>
<div class="midSec">Midcontent</div>
<div class="btmSec"></div>
</div>
CSS
.outer {
position: relative;
height: 400px;
text-align: center;
}
.topSec {
height: 50%;
background: red ;
}
.btmSec {
height: 50%;
background: yellow ;
}
.midSec {
position: absolute;
background: rgba(255,255,255,0.7);
z-index: 1;
top: 50%;
height: 60px;
margin-top: -30px;
left: 0;
right: 0;
line-height: 60px
}
I have a div that is positioned absolutely in CSS. That div has overflow:auto so sometimes it shows a scrollbar if it has a lot of content. I need to completely overlay that div with another div, this one semitransparent so as to completely cover the first div.
The problem is that when a scrollbar is shown in the outer div, the overlay div does not cover it.
My HTML
<div id="outer">
<div id="content">
1<br/>2<br/>3<br/>4<br/>5<br/>
6<br/>7<br/>8<br/>9<br/>10<br/>
11<br/>12<br/>13<br/>14<br/>15<br/>
</div>
<div id="overlay">
</div>
</div>
My CSS
div#outer {
overflow: auto;
position: absolute;
top: 60px;
left: 20px;
height: 200px;
width: 200px;
border: 3px solid blue;
}
div#content {
background-color: lightgray;
}
div#overlay {
position: absolute;
top: 0px;
bottom: 0px;
left: 0px;
right: 0px;
background-color: yellow;
opacity: 0.8;
z-index: 2;
}
Run this here:
http://jsfiddle.net/pTnXF/4/
Any ideas?
Placing the #overlay inside #content and adding a "position:relative" to #content could work.
http://jsfiddle.net/pTnXF/5/
HTML changes
<div id="outer">
<div id="content">
1<br/>2<br/>3<br/>4<br/>5<br/>
6<br/>7<br/>8<br/>9<br/>10<br/>
11<br/>12<br/>13<br/>14<br/>15<br/>
<div id="overlay">
</div>
</div>
</div>
CSS changes
div#content {
background-color: lightgray;
position: relative;
}
jquery
$("#overlay").css("height",($('#outer')[0].scrollHeight));
I want a few divs to be positioned in a line next to each other, but also allow them to overlap the previous div.
What I'm trying to get is a timeline with divs for events of certain length. The events can overlap each other.
My idea was to give each div the same top position, an increasing z-index and an increasing left position (according to the time of the event). Later I would pop individual divs out by mouse-over events to visualise the overlap.
What I do is to make it so each div gets placed under the next one. With fiddling of the top attribute I can get them to align horizontally, but I don't see the pattern.
<div class="day">
<div style="top: 35px; left: 200px; background-color: red; height: 50px; width:24px; z-index: 1; position: relative;"> </div>
<div style="top: 35px; left: 220px; background-color: green; height: 50px; width:24px; z-index: 2; position: relative;"> </div>
<div style="top: 35px; left: 225px; background-color: blue; height: 50px; width:48px; z-index: 3; position: relative;"> </div>
</div>
If I use absolute positions, the elements fly out of the surrounding div and are positioned absolutely at some place in the page.
It's simple. Make an inner div using absolute positioning but wrapped with a div that uses relative positioning:
<div id="container" style="position: relative;width:200px;height:100px;top:100px;background:yellow">
<div id="innerdiv1" style="z-index: 1; position:absolute; width: 100px;height:20px;background:red;">a</div>
<div id="innerdiv2" style="z-index: 2; position:absolute; width: 100px;height:20px;background:blue;left:10px;top:10px;"></div>
</div>
You can use another method like negative margin, but it's not recommended if you want to dynamically change HTML. For example, if you want to move the position of the inner div(s), just set the top/left/right/bottom CSS properties of the container or modify the properties using JavaScript (jQuery or otherwise).
It will keep your code clean and readable.
Use Negative Margins!
<div class="day">
<div style="top: 35px;left: 200px; background-color: red; height: 50px; width:24px; z-index: 1; position: relative; margin-top: -15px;"> </div>
<div style="top: 35px;left: 220px; background-color: green; height: 50px; width:24px; z-index: 2; position: relative; margin-top: -15px;"> </div>
<div style="top: 35px;left: 225px; background-color: blue; height: 50px; width:48px; z-index: 3; position: relative; margin-top: -15px;"> </div>
</div>
Fiddle: http://jsfiddle.net/vZv5k/
Another Solution:
Give the .day class a width, height, and position it relatively, keeping the inner divs absolutely positioned.
Check out the below CSS:
.day {position: relative; width: 500px; height: 500px;}
And the HTML:
<div class="day">
<div style="top: 35px;left: 200px; background-color: red; height: 50px; width:24px; z-index: 1;"> </div>
<div style="top: 35px;left: 220px; background-color: green; height: 50px; width:24px; z-index: 2;"> </div>
<div style="top: 35px;left: 225px; background-color: blue; height: 50px; width:48px; z-index: 3;"> </div>
</div>
I found the solution. It's probably blindingly obvious to anyone who knows css.
I thought I could not use absolute positioning because my elements would fly out of the surrounding div.
Turns out, I misunderstood absolute positioning. It's not the same as fixed, but to me it looked like that.
https://developer.mozilla.org/en-US/docs/CSS/position explains it well.
Absolute positioning positions absolutely to the next surrounding anchor. That defaults to the whole page, if no other anchor is defined.
To make something a anchor it needs to be position: relative;
Quick solution
add position: relative; to the day class and using absolute positioning in the inner div.
With the top attribute, you can also move relatively positioned objects. In my code sample the red box overlaps the green box due to it's z-index. If you remove the z-index, then the green box is on top.
HTML:
<div class="wrapper">
<div class="box one"></div>
<div class="box two"></div>
</div>
CSS:
.wrapper {
width: 50px;
height: 50px;
overflow: hidden;
}
.box {
width: 100%;
height: 100%;
position: relative;
}
.box.one {
background-color: red;
z-index: 2;
top: 0px;
}
.box.two {
background-color: green;
z-index: 1;
top: -50px;
}
I have a div element wrapping other div elements like so:
<div style="overflow:hidden">
<div id="a"></div>
<div id="b"></div>
</div>
I have other css rules that manage the dimensions of the outer div. In my actual code, I want to position the div#a exactly 10 px below the outer div. However, I want div#b to still be cut off by the outer div's overflow:hidden.
What is the best way to achieve this?
Method 1
A good way to do it is by setting the overflowing element to position:fixed (which will make it ignore the parent overflow), and then positioning it relative to the parent using this technique:
.parent {
position: relative;
.fixed-wrapper {
position: absolute;
.fixed {
position: fixed;
}
}
}
One caveat is that you cannot have any of the top,right,left,bottom properties set on the fixed element (they must all be default 'auto'). If you need to adjust the position slightly, you can do so using positive/negative margins instead.
Method 2
Another trick I recently discovered is to keep the overflow:hidden element with position:static and position the overriding element relative to a higher parent (rather than the overflow:hidden parent). Like so:
http://jsfiddle.net/kv0bLpw8/
#wrapper {
width: 400px;
height: 50px;
position: relative;
z-index: 1000;
left: 0px;
top: 0px;
}
#wrapper #insideDiv {
width: 400px;
height: 50px;
overflow: hidden;
position: absolute;
z-index: 2000;
left: 0px;
top: 0px;
}
#wrapper #a {
position: absolute;
height: 30px;
width: 100px;
bottom: -40px;
z-index: 1000;
left: 0px;
}
<div id="wrapper">
<div id="a">AAA</div>
<div id="insideDiv">
<div id="b">BBB</div>
</div>
</div>
The easiest and most convenient way is to wrap your container div inside another div and set position: relative on the external div.
.outer-container {
position: relative;
height: 50px;
}
.container {
background: gray;
overflow: hidden;
height: 50px;
}
#a,
#b {
height: 100px;
width: 100%;
}
#a {
background: green;
position: absolute;
top: 60px;
}
#b {
background: red;
font-size: 60px;
}
<div class="outer-container">
<div class="container">
<div id="a"></div>
<div id="b">Cut off</div>
</div>
</div>
as people said, the element must be presented outside the parent in order to be not cropped. But you can do this with JavaScript to achieve the similar concept without having to change your actual markup:
function breakOverflow(elm) {
var top = elm.offset().top;
var left = elm.offset().left;
elm.appendTo($('body'));
elm.css({
position: 'absolute',
left: left+'px',
top: top+'px',
bottom: 'auto',
right: 'auto',
'z-index': 10000
});
}
then pass the element you want to exclude from the cropping of its parent:
breakOverflow($('#exlude-me'));
Hello
please have a look at my jsfiddle.
The content of the inner div-element is scrollable.
Each grey symbol has a margin-left. When I scroll the content the symbols shouldn't be fixed to the background.
It should be scrollable with the position.
Have you got an idea how I achieve that effect?
Keep in mind that positioning is relative to the closest positioned parent.
When you are assigning an absolute position to the "symb" class you are positioning them relative to the document rather than their parent.
Simply adding "position: relative;" to your div.tl element will set the parent div as positioned without moving it and the "symb" elements will act the way I think you expect them to.
Your new .tl definition should be:
.tl {
width: 500x;
height: 80px;
background-color:grey;
position: relative;
}
Furthermore, I'm assuming that you have some need to position these absolutely. You could achieve similar results by simply removing the "position: absolute" portion of your .symb definition.
You are setting a margin, not a position, so you don't need to bother with positioning at all in your example case.
I am not sure what do you need. You had an error in your last "symb" - you missed 'p' in 'px'. Try this?
<div class ="outer">
<div class="inner">
<div class="tl">
<div class="box" style="width: 315px;">
<div class="symb" style="margin-left: 0px;"></div>
<div class="symb" style="margin-left: 15px;"></div>
<div class="symb" style="margin-left: 20px;"></div>
</div>
</div>
</div>
</div>
.outer {
width:50%;
}
.inner {
overflow-x:scroll;
}
.tl {
width: 500x;
height: 80px;
background-color:grey;
}
.box {
float: left;
height: 61px;
}
.box .symb {
float:left;
width: 5px;
height: 5px;
background-color: #cccccc;
z-index: 999;
margin-top: 10px;
}
Use
position: relative;
Not
position: absolute;
Just try with the following CSS:
.box .symb {
position: relative;
float: left;
position: inline-block;
width: 5px;
height: 5px;
background-color: #cccccc;
z-index: 999;
margin-top: 10px;
}