CODEWITHSUNDEEP
htmlcsspositionheightabsolute
Wordpressor
Wordpressor

Reputation: 7553

Position: absolute and parent height?

I have some containers and their children are only absolute / relatively positioned. How to set the container's height so their children will be inside of them?

Here's the code:

HTML

<section id="foo">
  <header>Foo</header>

  <article>
    <div class="one"></div>
    <div class="two"></div>
  </article>
</section>    
    
<div style="clear:both">Clear won't do.</div>
<!-- I want to have a gap between sections here -->
    
<section id="bar">
  <header>bar</header>
  
  <article>
    <div class="one"></div>

    <div></div>

    <div class="two"></div>
  </article>
</section>

CSS

article {
  position: relative;
}
    
.one {
  position: absolute;
  top: 10px;
  left: 10px;
  background: red;
  width: 30px;
  height: 30px;
}
    
.two {
  position: absolute;
  top: 10px;
  right: 10px;
  background: blue;
  width: 30px;
  height: 30px;
}

Here's a jsfiddle. I want the "bar" text to appear between 4 squares, not behind them.

http://jsfiddle.net/Ht9Qy/

Any easy fixes?

Note that I don't know the height of these children, and I can't set height: xxx for containers.

Upvotes: 168

Views: 377209

Answers (9)

senthilkumar
senthilkumar

Reputation: 19

if you use like this your child content come with 100% height.you have to use "height: fit-content" and "display: flex;" along with "position:absolute;"

article {
    height: fit-content ; /* Add this line if its not working */
    display: flex;
    justify-content: space-between;
    flex-flow: row wrap;
    background: whitesmoke;
    position:absolute;
    top: 10px;
    left: 10px;
    bottom: 10px;
  
}

check this sample "https://codepen.io/kuttisenthil/pen/ZYELWaP"

Upvotes: 0

Tom Davies
Tom Davies

Reputation: 1890

2022 UPDATE. This answer is nearly 10 years old. When it was written we didn't have layout technologies like Flex or Grid available (they were dark, hacky/fun times).

Thankfully things have massively improved. Jöcker's answer shows you how to achieve this layout with Grid. If you can live with not supporting legacy browsers, do that instead!

Original Answer

If I understand what you're trying to do correctly, then I don't think this is possible with CSS while keeping the children absolutely positioned.

Absolutely positioned elements are completely removed from the document flow, and thus their dimensions cannot alter the dimensions of their parents.

If you really had to achieve this affect while keeping the children as position: absolute, you could do so with JavaScript by finding the height of the absolutely positioned children after they have rendered, and using that to set the height of the parent.

Alternatively, just use float: left/float:right and margins to get the same positioning effect while keeping the children in the document flow, you can then use overflow: hidden on the parent (or any other clearfix technique) to cause its height to expand to that of its children.

article {
  position: relative;
  overflow: hidden;
}
    
.one {
  position: relative;
  float: left;
  margin-top: 10px;
  margin-left: 10px;
  background: red;
  width: 30px;
  height: 30px;
}
    
.two {
  position: relative;
  float: right;
  margin-top: 10px;
  margin-right: 10px;
  background: blue;
  width: 30px;
  height: 30px;
}

Upvotes: 112

J&#246;cker
J&#246;cker

Reputation: 6808

You can do that with a grid:

article {
  display: grid;
}
    
.one {
  grid-area: 1 / 1 / 2 / 2;
}
    
.two {
  grid-area: 1 / 1 / 2 / 2;
}

Upvotes: 40

Иван 26rus
Иван 26rus

Reputation: 109

Set element with style position:absolute top: 0, botton: 0

Upvotes: -1

Az.Youness
Az.Youness

Reputation: 2662

Here is my workaround,
In your example you can add a third element with "same styles" of .one & .two elements, but without the absolute position and with hidden visibility:

HTML

<article>
   <div class="one"></div>
   <div class="two"></div>
   <div class="three"></div>
</article>

CSS

.three{
    height: 30px;
    z-index: -1;
    visibility: hidden;
    width:0!important; /* if you got unnecessary horizontal scroll*/
}

Upvotes: 41

jac wida
jac wida

Reputation: 197

article {
    position: relative;
   
}

//clear the float

article::after{
  content: '';
  clear: both;
  
}

.one {
    position: relative;
    float:left
    margin-top: 10px;
    margin-left: 10px;
    background: red;
    width: 30px;
    height: 30px;
}

.two {
    position: relative;
    float: right;
    margin-top: 10px;
    margin-right: 10px;
    background: blue;
    width: 30px;
    height: 30px;
}

Upvotes: 1

Colin Dodgson
Colin Dodgson

Reputation: 19

This kind of layout problem can be solved with flexbox now, avoiding the need to know heights or control layout with absolute positioning, or floats. OP's main question was how to get a parent to contain children of unknown height, and they wanted to do it within a certain layout. Setting height of the parent container to "fit-content" does this; using "display: flex" and "justify-content: space-between" produces the section/column layout I think the OP was trying to create.

<section id="foo">
    <header>Foo</header>
    <article>
        <div class="main one"></div>
        <div class="main two"></div>
    </article>
</section>    

<div style="clear:both">Clear won't do.</div>

<section id="bar">
    <header>bar</header>
    <article>
        <div class="main one"></div><div></div>
        <div class="main two"></div>
    </article>
</section> 

* { text-align: center; }
article {
    height: fit-content ;
    display: flex;
    justify-content: space-between;
    background: whitesmoke;
}
article div { 
    background: yellow;     
    margin:20px;
    width: 30px;
    height: 30px;
    }

.one {
    background: red;
}

.two {
    background: blue;
}

I modified the OP's fiddle: http://jsfiddle.net/taL4s9fj/

css-tricks on flexbox: https://css-tricks.com/snippets/css/a-guide-to-flexbox/

Upvotes: 1

CESARVALLES
CESARVALLES

Reputation: 1

This is another late answer but i figured out a fairly simple way of placing the "bar" text in between the four squares. Here are the changes i made; In the bar section i wrapped the "bar" text within a center and div tags.

<header><center><div class="bar">bar</div></center></header>

And in the CSS section i created a "bar" class which is used in the div tag above. After adding this the bar text was centered between the four colored blocks.

.bar{
    position: relative;
}

Upvotes: -20

user3517189
user3517189

Reputation: 41

This is a late answer, but by looking at the source code, I noticed that when the video is fullscreen, the "mejs-container-fullscreen" class is added to the "mejs-container" element. It is thus possible to change the styling based on this class.

.mejs-container.mejs-container-fullscreen {
    // This rule applies only to the container when in fullscreen
    padding-top: 57%;
}

Also, if you wish to make your MediaElement video fluid using CSS, below is a great trick by Chris Coyier: http://css-tricks.com/rundown-of-handling-flexible-media/

Just add this to your CSS:

.mejs-container {
    width: 100% !important;
    height: auto !important;
    padding-top: 57%;
}
.mejs-overlay, .mejs-poster {
    width: 100% !important;
    height: 100% !important;
}
.mejs-mediaelement video {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100% !important;
    height: 100% !important;
}

I hope it helps.

Upvotes: 4

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