I want to have a login form centred on the page. An example is here
I know how to centre an element what I can't work out is how to centre an element always in the centre of the page even if the browser window changes size
Classic problem. Here's some example CSS:
#your_element{
position: fixed;
left: 50%;
top: 50%;
width: 600px;
height: 400px;
margin-left: -300px;
margin-top: -200px;
}
Important bit: the negative margins should be half of the respective dimensions.
Add position: fixed; to it's style. If you know how to center it, then just adding this should do the trick.
Have a look here for more info: http://www.w3.org/TR/CSS2/visuren.html#choose-position
I keep this template HTML just for this situation, when I need a container that is vertically and horizontally centered:
CSS:
html, body {
height: 100%;
}
body {
background: #ffc;
margin: 0;
padding: 0;
}
#vertical-center {
float: left;
height: 50%;
width: 100%;
margin-top: -185px;
}
#content {
background: #ffffde;
border: 2px dashed red;
clear: both;
margin: 0 auto;
padding: 10px;
height: 350px;
width: 500px;
}
HTML:
<div id="vertical-center"></div>
<div id="content">
<h1>Centered Content</h1>
<p>This content is centered on the page.</p>
<p>More importantly, it won't get cut off when the browser window becomes too small to display it.</p>
</div>
Note that the #vertical-center has a margin-top that has to be half the height of the #content div, and it has to be negative.
Related
Ok, i thought of starting afresh following some confusions in my previous similiar post. Here, I am trying to know the exact "reason" as to why exactly my outer container div ("container" , pink) is not automatically expanding vertically to fit the content div ("content" , red) (which automatically expands vertically with length of text). I am looking a reason more than the solution, because the reason will help me understand the concept more deeply. Please copy dummy text loremipsum... several times in the "content" div so that it overflows from page
Screenshot
here is the code:
html, body {
width: 100%;
left: 0px;
top: 0px;
margin: 0px;
height: 100%;
}
.container {
width: 600px;
left: 0px;
position: relative;
right: 0px;
background-color: rgba(216,86,112,0.5);
margin: auto;
height: 100%;
}
.content {
height: auto;
width: 200px;
background-color: rgba(255,0,0,1);
position: absolute;
top: 0px;
bottom: auto;
left: 0px;
right: 0px;
margin: auto;
}
</style>
</head>
<body>
<div class="container">
<div class="content">
/* Paste dummy text here more than a page */
</div>
</div>
</body>
</html>
The problem is the following:
Instead of using
.container {
height: 100%;
}
try:
.container {
height: auto;
}
and instead of
.content {
position: absolute;
}
use
.content {
position: relative;
}
Here's why
When an element is set to be 'position: absolute' it wont collapse with any other element, that's why your container doesn't expand at all.
When an element is set to be 'Height:100%' it takes the height of its container, in your case the cointainer is the body which means it will take 100% percent of your screen (in your case), but your content is way higher than the screen and that's why it overflows your content.
Hope you understand....
Examining this HTML:
<div class="wrapper">
<div class="content">
</div>
</div>
<div class="footer">
<hr />
<p>some text</p>
</div>
and CSS:
.footer {
position: absolute;
height: 100px;
width: 100%;
bottom: 0;
background-color: black;
}
.wrapper {
padding-bottom: 100px;
background-color: blue;
height: 100%;
}
.content {
width: 200px;
height: 100px;
margin: auto;
background-color: green;
}
html, body {
width: 100%;
height: 100%;
}
You can see that footer have position absolute and stay at the bottom of the page. wrapper will cover the remaining space and contain a content inside it. I want to vertical-align content without breaking the current layout. Do you have any suggestion?
Here is JSFiddle link. (Note: jsfiddle doesn't work as expected, there always a space beneath footer, this behavior doesn't occur when run the HTML file in browser).
Note: I don't want to use fixed height for wrapper, I want it covers all the remaining space, so please don't suggest me to use line-height
I tried the example here but it doesn't seem to work
NOTE I want the layout easy to modify (like add a header or content at the top) without breaking it therefore I want to avoid using absolute position on wrapper and content
NOTE 2 Sorry for not to clarify, actually, content doesn't have fixed size, its size depend on the content inside it, so the solution using negative margin doesn't work as I mentioned above
Here is one approach using the following CSS:
.footer {
position: absolute;
height: 100px;
width: 100%;
bottom: 0;
background-color: black;
}
.wrapper {
background-color: blue;
position: absolute;
top: 0;
bottom: 100px;
left: 0;
right: 0;
}
.content {
width: 200px;
height: 100px;
background-color: green;
position: absolute;
top: 50%;
left: 50%;
margin-top: -50px;
margin-left: -100px;
}
html, body {
width: 100%;
height: 100%;
margin: 0;
}
Use absolute positioning and then negative margins, since your content has well-defined
dimensions, this is relatively straightforward.
See demo at: http://jsfiddle.net/audetwebdesign/DgUV2/
For .wrapper, use the top, bottom, left and right offsets to stretch the div to the
full width and height, taking into account the 100px for the footer.
For .content, set top and left to 50%, the center point of the .wrapper and then adjust
for the center of the .content div using negative margins.
Remember to zero out the margin for the body or else you might see 10px whitespace
depending on your browser.
Add this to your .content
position: relative;
top: 50%;
transform: translateY(-50%);
Just 3 lines of code to vertical align
I was able to get it to work using Method 1 from the example you linked
I added the following:
.content {
width: 200px;
height: 100px;
margin: auto;
background-color: green;
/* THE BELOW WAS ADDED */
position: absolute;
top: 50%;
left: 50%;
margin: -100px 0 0 -100px;
}
html, body {
width: 100%;
height: 100%;
/* BELOW ADDED TO REMOVE EXTRA SPACE AROUND EDGES */
margin: 0;
}
jsFiddle of working example
I have an image in my website that is defined with the following CSS:
#settings_big{
border: none !important;
margin: auto 0 0 0 !important;
padding: 0 !important;
float: right;
}
Because of the float the image obviously sits on the right side of the content. The top margin causes the image to sit right beneath the lowest hanging element in the content. This looks OK, but I would really prefer that the image sit as low as possible in the browser window to somewhat frame the content. I've seen multiple examples that use fixed positioning to achieve this, and this would work, however my content has a max and min width of 960px; using a fixed position of
bottom: 0;
right: 0;
causes the image to get pushed far right outside of the content to the edge of the browser window. Is it possible to push the image to the bottom of the browser window while keeping the
float: right;
positioning? I would rather not use JavaScript or jQuery but it is an option I suppose. Thanks in advance.
New answer:
<div class="container contentCont">
<div id="content"></div>
</div>
<div class="container imageCont">
<div id="image"></div>
</div>
With CSS:
.container {
width: 200px;
margin: 0 auto;
background: #ccc;
}
.contentCont {
min-height: 600px;
}
.imageCont {
position: fixed;
bottom: 0;
right: 0;
left: 0;
}
#image {
float: right;
width: 20px;
height: 20px;
border: 4px solid red;
}
Does it right as in this JSFiddle: http://jsfiddle.net/WYX7H/1/
The following might be close to what you need.
Assuming that your page layout vaguely looks like the following HTML:
<div class="wrapper">
<p>some words...</p>
<div class="slot">
<img src="http://placehold.it/200x200">
</div>
</div>
apply the following CSS:
.wrapper {
width: 600px;
height: 600px; /* for demo only, not critical... */
margin: 0 auto;
border: 1px solid blue;
}
.slot {
text-align: right;
position: fixed;
left: 50%;
bottom: 0;
margin-left: -301px;
width: 600px;
border: 1px dotted blue;
}
.wrapper img {
vertical-align: top;
}
See demo at: http://jsfiddle.net/audetwebdesign/6Xnxj/
If you don't know the width of the image (or you don't want to specify it),
create a wrapper that matches the width of the parent element and apply position: fixed to it.
The image can then be either floated or text-aligned to the right within the fixed block.
The fixed block can then be positioned to the left and bottom, and using margin-left
to keep it centered.
I have this container which can scroll the content. I would like the header in this container to always stay in the top.
http://jsfiddle.net/z9ze5/
Container:
.lists {
width: 300px;
height: 250px;
margin: 30px auto;
background: #39C;
overflow: scroll;
position: relative;
}
Header:
.box_header {
width: 100%;
height:30px;
overflow:hidden;
position: absolute;
margin: 0;
background: #DDD;
z-index: 999;
}
If you are willing to alter your mark-up, here is one way of doing it:
<div class="lists">
<header class="box_header">
<h1>HEADER 2</h1>
<div class="setting" id="btn2"></div>
</header>
<section class="content">
<p>Lorem Ipsum ....</p>
</section>
</div>
Wrap your scroll area in a <section> (or other block level element).
For your CSS:
.lists {
width: 300px;
height: 250px;
margin: 30px auto;
background: #39C;
position: relative;
}
section.content {
width: 300px;
height: 220px;
margin: 0 auto;
background: #39C;
position: relative;
top: 30px;
overflow: scroll;
}
Please see fiddle: http://jsfiddle.net/audetwebdesign/nGGXx/
More Advanced Example
If you study the following example:
http://jsfiddle.net/audetwebdesign/fBNTP/
uou can see how your scrolling boxes could be applied in a semi-flexible layout.
I lined up two scrolling boxes side by side and made their width proportionate to the width of the page.
The height is trickier to adjust. I fixed the height of the parent container, see the following rule:
.contentWrapper {
border: 1px solid red;
margin-top: 1.00em;
padding: 30px 0;
overflow: auto;
height: 400px;
}
If you change the height from 400px to some other value, the scrolling boxes will adjust themselves.
Hopefully, these examples will give you and others some more insights into how to build these more advanced layout designs.
If you want a non-css fix, add this listener...
$('.lists').scroll(function() {
$('.box_header', this).css('top', $(this).scrollTop()+'px');
});
and then change .lists css to give relative positioning
.box_header {
width: 100%;
height:30px;
overflow:hidden;
position: relative;
margin: 0;
background: #DDD;
z-index: 999;
}
Any position absolute within a position relative is absolute to the relative container. In order to have a header that stays in position, you'd need to position it above, not within, the scrolling container.
look at adding position: fixed to your header div .box_header. You may have to add padding of the height of the box header div to section.content but as you have that set to 30px that should be fine. IE6 and lower has issues with fixed positioning but hopefully we can live with that now - less people are using that than are still listening to Moby.
I have this following chunk of my page.
Style:
.featuredcontainer {
width: 450px;
height: 700px;
margin-left: auto;
margin-right: auto;
position: relative;
right: 160px;
top: 30px;
border: 1px groove grey;
}
.navcontainer
{
margin-left: auto;
margin-right: -8px;
position: relative;
top: 75px;
height: 600px;
width: 300px;
}
And example HTML:
<div class="featuredcontainer">
content
</div>
<div class="lessonnavcontainer">
menu
</div>
When the page is displayed. the navcontainer is to the right of (as it should) but under the featuredcontainer. When I move the navcontainer up using relative positioning, it looks right, but there is a bunch of empty space at the bottom of the page. What do I do?
Surround your two divs with a "wrapper" div like so:
<div id="wrapper">
<div class="featuredcontainer">content</div>
<div class="lessonnavcontainer">menu</div>
</div>
Then to center them, add margins to the wrapper:
#wrapper { margin: 0px auto; }
Then to have the two divs be side by side, add a float:
.featuredcontainer { float: left; }
.lessonavcontainer { float: left; }
In order for the centering to work, you need to declare a width on the wrapper:
#wrapper { width: 800px; }
Put both the nav and the featured containers into another wrapper div.
HTML
<div class='wrapper'>
<div class="navcontainer">
menu
</div>
<div class="featuredcontainer">
content
</div>
</div>
And get rid of all the relative positioning. Relative positioning is not recommended for basic layout issues like this. Use floats instead. The wrapper should have a fixed width, which allows it to be centered properly with margin: 0 auto.
CSS
.wrapper{
width:752px;
margin: 0 auto;
overflow:auto;
}
.featuredcontainer {
width: 450px;
height: 700px;
float:left;
border: 1px groove grey;
}
.navcontainer{
float:left;
height: 600px;
width: 300px;
background:#ff0;
}
JSFiddle http://jsfiddle.net/5w5SC/
Use the float property. Using float, css can position divs next to each other horizontally.
.featuredcontainer {
width: 450px;
height: 700px;
margin-left: auto;
margin-right: auto;
position: relative;
right: 160px;
top: 30px;
border: 1px groove grey;
float: left;
}
.navcontainer
{
margin-left: auto;
margin-right: -8px;
position: relative;
top: 75px;
height: 600px;
width: 300px;
float: left;
}
Thats a starting point, try to use float left or float right and see what happens. Fiddle with it until it looks exactly how you want it.
To get them side-by-side you need to add the float attribute in the CSS. To get them to resize with page width you need to add relative widths to them. To center them on the page (horizontally) you need to put the divs inside a relative positioned div in the html. Here is a fiddle. http://jsfiddle.net/Ne5zs/
Be sure to introduce a clearfix (there are many versions of this technique) on any floated object; then center their containing block element using margin: 0 auto.