How in CSS can I make the section fluid when absolutely positioned?
<div class="layout">
<aside>leftnav</aside>
<section>content fluid here</content>
</div>
aside {
width: 200px;
position: absolute;
left: 0;
top: 0;
}
section {
position: absolute;
top: 0;
left: 200px;
//fluid width to fill window
}
Edit: With absolute positionning, just add:
section {
position: absolute;
top: 0;
left: 200px;
right: 0px; // this line
}
End of edit.
Use float on the aside tag and add a margin-left to the section:
aside {
width: 200px;
float: left;
}
section {
margin-left: 200px;
}
Related
I have a video and a canvas inside a div and I want to overlay the canvas over the video. I tried this:
.container {
margin: 0 auto;
position: relative;
}
.video {
width: 100%;
height: auto;
position: absolute;
top: 0;
left: 0;
}
.canvas {
width: 100%;
height: auto;
position: absolute;
top: 0;
left: 0;
z-index: 10;
}
JSFiddle here
But for some reason the canvas does not cover the whole video, it is shorter. How do I fix that?
Canvas must have absolute width and height. When the video load you can assign the right width and height.
Here: jsfiddle:
https://jsfiddle.net/7sk5k4gp/13/
PS: I put a red filter for better understanding.
Code above:
<style>
.canvas {
position: absolute;
top: 0;
left: 0;
z-index: 10;
background-color:rgba(255,0,0,0.5);
}
</style>
<div class="container">
<video class="video" id="vd1" controls autoPlay src="http://upload.wikimedia.org/wikipedia/commons/7/79/Big_Buck_Bunny_sma ll.ogv" onplay="resize_canvas(this)"></video>
<canvas class="canvas" id="cv1"></canvas>
</div>
<script>
function resize_canvas(element)
{
var w = element.offsetWidth;
var h = element.offsetHeight;
var cv = document.getElementById("cv1");
cv.width = w;
cv.height =h;
}
</script>
Adjusting the canvas's height to 100% makes sure the entire video is covered. The auto tag just adjusts the size of an object relative to the amount of data needed to be shown. E.g. for a <\p> tag with 'width:auto' the more text, the wider the tag etc.
.container {
margin: 0 auto;
position: relative;
}
.video {
width: 100%;
height: 100%;
position: fixed;
top: 0;
left: 0;
}
.canvas {
width: 100%;
height: 100%;
position: fixed;
background-color:black;
top: 0;
left: 0;
z-index: 10;
}
I have this div here...
<div class="gallery"></div>
and here is the CSS:
.gallery {
background-color: #000;
height: 125px;
text-align: center;
position: fixed;
width: 100%;
z-index: 99999999;
top: 10%;
}
Now my site is broken up into <section> and I am trying to have that element at the top of the section at all times, not that top of the page. How would I accomplish this ?
Add css position: relative to your <section>. Then for .gallery, change fixed to position: absolute; top: 0; left; 0;
Remove that top; 10% stuff too...
You would have to modify the position to be absolute and and top: 0;
I'm trying to figure out how to code my HTML & CSS to have the 3 screenshots images align up like in the screenshot below.
The idea is when the user resizes the window smaller the images on the left and right should move in towards the center, or tighter behind the main image and the main image always stays centered.
My Dev Link:
http://leongaban.com/portfolio/athenasweb/
My CodePen
http://codepen.io/leongaban/pen/AwJFt
And tips or direction would be super appreciated! :D
HTML
<div class="pattern">
<div class="athena_thumbs">
<div class="first">
<img src="../../images/athena1.jpg"/>
</div>
<div class="second">
<img src="../../images/athena2.jpg"/>
</div>
<div class="third">
<img src="../../images/athena3.jpg"/>
</div>
</div>
</div>
CSS
div.inner .pattern {
position: absolute;
width: 100%;
height: 100%;
background-image:url('http://leongaban.com/images/pattern_diagonal_lines.png');
background-repeat: repeat;
z-index:2;
}
.athena_thumbs {
position: absolute;
max-width: 1000px;
margin: 250px auto 0;
}
.athena_thumbs .first {
position: relative;
margin: 0 auto;
float: left;
left: 25%;
right: 25%;
z-index: 3;
}
.athena_thumbs .second {
position: relative;
float: left;
left: 10%;
right: 5%;
z-index: 2;
}
.athena_thumbs .third {
position: relative;
float: left;
right: 10%;
left: 5%;
z-index: 1;
}
Running late for a meeting.
But, if you take a look at
Code Pen: http://codepen.io/anon/pen/bazEr
.athena_thumbs {
position: absolute;
width: 90%;
margin-left: 5%;
text-align: center;
overflow: hidden;
}
.athena_thumbs .first {
position: relative;
margin: 0 auto;
z-index: 3;
}
.athena_thumbs .second {
position: absolute;
left: 0px;
top: 0px;
z-index: 2;
}
.athena_thumbs .third {
position: absolute;
right: 0px;
top: 0px;
z-index: 1;
}
I think this will get you going in the correct direction.
There is nothing in the way of cross-browser checking.
Just the basic according effect more or less in place.
Hope this helps.
I hope this helps you out. I've put together a small demonstration of how I'd go about getting the effect you're after, which you can find here.
I would set the outside thumbnails to position: absolute;, sticking them to either side of the parent container, and ensuring you give them a top position to keep them in line. Set the centered thumbnail to position: relative, and center it with automatic margins as you normally would. z-indexing keeps the outside thumbs behind the centered one.
div#ipsko changes width and height to satisfy absolute positioning.
Why img#utas doesn't?
JSFiddle: http://jsfiddle.net/pejh7/1/
HTML code:
<div id="upsko">
<img id="utas" src="http://kharg.czystybeton.pl/108.png" />
<div id="ipsko"></div>
</div>
CSS code:
div#upsko {
position: relative;
top: 200px; left: 200px; width: 100px; height: 100px;
background: rgba(255,0,0,0.5);
}
img#utas {
position: absolute;
top: 10px; left: 10px; right: 10px; bottom: 10px;
}
div#ipsko {
position: absolute;
top: 0; left: 0; bottom: 0; right: 0;
background: rgba(0,255,0,0.5);
}
Put the img tag in a div, give the image 100% width and height, and then absolute position the container div, e.g.
HTML:
<div id="upsko">
<div id="utas">
<img src="http://kharg.czystybeton.pl/108.png" />
</div>
<div id="ipsko"></div>
</div>
CSS:
#upsko {
position: relative;
top: 200px; left: 200px; width: 100px; height: 100px;
background: rgba(255,0,0,0.5);
}
#utas {
position: absolute;
top: 10px; left: 10px; right: 10px; bottom: 10px;
}
#utas img { height: 100%; width: 100%; }
#ipsko {
position: absolute;
top: 0; left: 0; bottom: 0; right: 0;
background: rgba(0,255,0,0.5);
}
Fiddle
The issues you describe are cause by the image width being unspecified (as other answers have stated) unfortunately without stating a px value for the image size (or converting the top/left/bottom/right and height+width to %) there's no way around this without adding an extra div.
I know adding extra div's is generally considered bad practice, but when it gives you flexibility as above, I think it's generally fine to do.
see the the div "div#ipsko" does not has its own height and width so it inherit its parent height and width . But the image has its own height and width . so you have to specify the height and width of image to make in fit in the div.
img#utas {
position: absolute;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
width: 100%;
height: 100%;
}
div#upsko {
position: relative;
top: 20px;
left: 20px;
width: 100px;
height: 100px;
background: rgba(255,0,0,0.5);
}
img#utas {
position: absolute;
top: 0px;
left: 0px;
right: 0px;
bottom: 0px;
width: 100%;
height: 100%;
}
iv#ipsko {
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
background: rgba(0,255,0,0.5);
}
please try above code.
You image's actual width and height are overriding things. (The browser will adjust an img element's dimensions to match that of the actual image, once it's downloaded it and can tell what they are, if no width and height are specified as attributes of the img or in the CSS.)
With a normal div rather than an image, you could reset the width and height back to auto if they were being set somewhere else, but auto for an image takes you back to the actual image dimensions. If you just wanted the image to match the size of the container, a 100% width/height would fix things, but that's not going to work if you want a different size implied by fixed positioning.
The only thing I can think of would be to change the markup so that your image loads inside a div, and then has 100% width.
Example jsFiddle here:
<div id="container">
<img id="utas" src="http://kharg.czystybeton.pl/108.png" />
</div>
div#container {
position: absolute;
top: 10px;
left: 10px;
right: 10px;
bottom: 10px;
width: auto;
height: auto;
}
img#utas {
width: 100%;
height: 100%;
}
What I am trying to is have a header image centered on the top with a different color background on either side, dynamically filling the rest of the page. The structure would look like this:
<div id="Header_Container">
<div id="Header_Left"></div>
<div id="Header_Center"></div>
<div id="Header_Right"></div>
</div>
The Header_Center is of 960px and the Header_Left and Header_Right should fill either side of the image to the edge of the page and change width as the page width changes.
I can not get the CSS to work properly.
I assume you want those 3 divs to fill each with different content, the outsides filled fluidly or multiline. Otherwise the answer could be much 1) more simple. I also assume that the center div defines the total height of the header.
Given these two assupmtions, still a few different scenarios are thinkable of which I will give 4 examples from which you can choose the best fitting solution.
The HTML is exactly yours.
The CSS looks like:
#Header_Container {
width: 100%;
position: relative;
}
#Header_Left {
position: absolute;
left: 0;
right: 50%;
margin-right: 480px;
}
#Header_Right {
position: absolute;
left: 50%;
right: 0;
margin-left: 480px;
top: 0;
}
#Header_Center {
width: 960px;
position: relative;
left: 50%;
margin-left: -480px;
}
Now, you could change behaviour of left and right with a few extra styles:
height: 100%;
overflow: hidden;
See demonstration fiddle.
1) When the sides may be partially invisible outside the browser window (in case which you would align content in de left div to the right, and vise versa), then I suggest the solution in this fiddle demo which does not require absolute positioning at all so that any content below the header is properly cleared in all circumstances.
You must fix it using padding and box model + position : relative - it can be done without HTML Change
<div id="Header_Container">
<div id="Header_Left"></div>
<div id="Header_Right"></div>
<div id="Header_Center"></div>
</div>
And CSS ( 100px is for example )
#Header_Container{ overflow: hidden; height: 100px; }
#Header_Container *{ box-sizing: border-box; height: 100%; }
#Header_Left{ width: 50%; padding-right: 480px; }
#Header_Right{ margin-left: 50%; width: 50%; padding-left: 480px; position: relative; top: -100% };
#Header_Center{ margin: 0 auto; width: 960px; position: relative; top: -200%; }
Example is here http://jsfiddle.net/ZAALB/2/
EDITed incorrect example
If I got you right then this might be a possible solution.
#container {
width: 100%;
height: 150px;
}
#left {
position: absolute;
left: 0;
width: 50%;
height: 150px;
background-color: #FF0000;
}
#right {
position: absolute;
right: 0;
width: 50%;
height: 150px;
background-color: #0000FF;
}
#center {
position: absolute;
left: 50%;
margin-left: -480px;
width: 960px;
height: 150px;
background-color: #888888;
}
#left basically says that the element will be positioned absolute and attached to the left side with a width of 50%. Same applies to #right just for the right side.
#center positions the element absolute pushed 50% to the left and then with a negative margin of width/2 which in your case would be 480px to position it in the center.
The order of the elements in the HTML is important for this hack.
<div id="container">
<div id="left"></div>
<div id="right"></div>
<div id="center"></div>
</div>
The #center DIV must be the last element if you don't want to work with z-indexes.
Here's a fiddle to test it.
HTML:
<div id="Header_Container">
<div class="Header_Side" id="Header_Left"></div>
<div class="Header_Side" id="Header_Right"></div>
<div id="Header_Center"></div>
</div>
CSS:
#Header_Container {
position: relative;
width: 100%;
}
#Header_Container > div {
height: 158px; /* height of the image */
}
.Header_Side {
position: absolute;
width: 50%;
}
#Header_Left {
left: 0;
background-color: blue;
}
#Header_Right {
left: 50%;
background-color: green;
}
#Header_Center {
position: relative;
width: 158px; /* width of the image */
margin: 0 auto;
background-image: url('...');
}
Also see this example.
This works, but you need to change your HTML: http://jsfiddle.net/gG7r7/1/
HTML
<div id="header_background_container">
<div id="header_left"></div>
<div id="header_right"></div>
</div>
<div id="header_content_container">
<div id="header_content"><p>Content goes here</p></div>
</div>
CSS
#header_content_container {
position:absolute;
z-index:1;
width: 100%;
height: 100%;
}
#header_content {
width: 960px;
margin: 0 auto;
background: red;
height: 100%;
}
#header_left {
background: white;
width: 50%;
height: 100%;
position: absolute;
z-index: 0;
}
#header_right {
background: black;
width: 50%;
height: 100%;
position: absolute;
z-index: 0;
}