I have a very simple structure and layout.
There is a #header and a #footer with a #body-container between them. The #header is position: fixed.
The #body-container has a margin-top: 3.1em to make room for the #header, which has height: 3em, but that doesn't work the way I thought it would. Even though the #header is not a child of the container, it won't render above the container (i.e. in the margin).
Why doesn't the #header render in the top margin of the #body-container? How can I achieve the desired effect?
You can fiddle with it here, and the code is here for reference:
HTML:
<body>
<div id="header">
</div>
<div id="body-container">
<div class="left">
</div>
<div class="right">
</div>
</div>
<div id="footer">
</div>
</body>
CSS:
div {
margin-bottom: 0.1em;
background-color: #99ccff;
}
#body-container {
background-color: white;
margin-top: 1.1em;
width: 20em;
height: 35em;
}
.left {
width: 2.5em;
height: 100%;
float: left;
}
.right {
margin-left: 2.6em;
height: 100%;
}
#header {
background-color: #99eeee;
position: fixed;
height: 3em;
width: 20em;
z-index: 1;
}
#footer {
height: 3em;
width: 20em;
}
That's an interesting effect. It seems that the #body-container pushes the edge of the body up and it affects the placement of the fixed header. This is happening because the header is set without coordinates. Add the following rule set to place the header at the very top of the page:
#header {
top: 0;
left: 0;
}
Another way to prevent the margin of the #body-container affect the placement of the header is to set the padding on the body element. The rule set below will eliminate the effect of the margin-top of the #body-container and keep the fixed #header aligned with the other content, if coordinates are NOT used for the #header.
body {
padding: 20px;
}
The effect is called "margin collapse," which is discussed in this thread as well. Margin collapse behavior is specified and expected.
There are a few ways to the desired effect I've learned about since asking. Working jsfiddles are linked:
Add negative margin-top to #header.
This feels cleanest to me.
Move the #body-container's margin-top to padding-top.
This is bound to mess with some of the possible CSS style/layout properties if things get complex, and it does leave a gap between the top of the page and the header.
Exactly specify the #header coordinates with top and left properties.
See #DRD's answer.
Add any nonzero padding to the body.
Again, see #DRD's answer.
Related
I have a common HTML structure made of a 73% width div floated left containing a several elements, one of which is the header. And a 23% width floated right sidebar.
<div class="primary">
<header>
</header>
</div>
<div class="sidebar">
</div>
Is it possible to get the header (which is nested in the first div) go on the top of the page full width and display underneath that parent div to the left with the sidebar to its right?
All this, without having to change the HTML structure and get the header outside its parent div.
Basically, I have this:
what I have
but I would like to get this:
what I would like
without changing the structure.
Yes, it is possible. But the solution is a little hacky. If you had the ability to change the html, that would be best, but, if not, here you go:
Make the body, position: relative; and set your header to position:absolute. Now you can move the header anywhere relative to the body.
If you add margin-top to the body, then you will have some white-space where you can position your header. Set the header width to 100%, give your header a set height to match the amount of margin you gave the body, and boom.
There are other ways of doing it, but this is one.
body {
position: relative;
margin:0;
margin-top: 50px;
width: 100%;
}
div.primary {
width:73%;
float:left;
background-color: yellow;
color:black;
text-align:center;
font-size: 2em;
}
div.sidebar{
float:right;
width: 23%;
background-color: red;
text-align:center;
font-size: 2em;
}
header {
box-sizing: border-box;
width: 100vw;
top: -50px;
left: 0;
background-color: lightblue;
position: absolute;
height: 50px;
}
p {
text-align: center;
}
<div class="primary">
PRIMARY
<header>
HEADER
</header>
</div>
<div class="sidebar">
SIDEBAR
</div>
I often have this problem with a lot of fixed navbars i.e. when I have a fixed navbar, how do I give the element below it some margin, so that the fixed navbar is not covering that element?
I was just wondering if there is a more elegant way of doing this apart from the <br> tag and margin-top.
The sample code would be like:
HTML code :
<nav>
I AM NAVBAR
</nav>
<br><br>
<div>
</div>
CSS code :
* {
padding: 0;
margin: 0;
}
nav {
height: 50px;
width: 100%;
background: #444;
color: #fff;
text-align: center;
font-weight: bold;
font-family: verdana;
position: fixed;
top: 0;
left: 0;
}
div {
height: 500px;
width: 100%;
background: tomato;
}
Fiddle here.
Fixed position relatives to the screen's viewport. You can just set top margin or padding on the body tag, and make the value >= the navbar height.
body {
margin-top: 50px; /*or padding*/
}
http://jsfiddle.net/5k5mxcn1/1/
There's a theory in CSS that you only apply bottom margins.
http://csswizardry.com/2012/06/single-direction-margin-declarations/
So to keep things modular, you could create a wrapping class:
<nav class="nav__wrapper">
<div class="nav__content">
Navigation
</div>
</nav>
<p>Text content</p>
css:
.nav__wrapper {
height: 30px;
margin-bottom: 10px // breathing room
}
.nav__content {
background: #dadada;
height: 30px;
line-height: 30px;
position: fixed;
width: 100%;
}
fiddle: http://jsfiddle.net/wv53qLwz/
A fixed element is position relative to the viewport, meaning it stays at the same designate spot and does not leave a gap in the page where it would normally have been located.
You can apply a top margin to the element that is directly following the fixed element.
div {
margin-top: 50px;
}
However, I've found out that using the scroll-margin property does the trick. It's explained better here https://css-tricks.com/almanac/properties/s/scroll-margin/#aa-enter-scroll-margin
div {
scroll-margin-top: 50px;
}
I am trying to make a footer that spans the width of a page minus 10px on the left and right. I am trying to do this by giving the body a padding on all sides of 10px. In the code below the header works just fine, but the footer is ignoring the body padding on the right side. Why is it doing that and how can I fix it?
<!DOCTYPE html>
<html>
<head>
<style>
div {
padding:0;
margin:0;
}
body {
margin: 0;
padding: 0 10px;
}
#header {
height: 150px;
width: 100%;
margin: 0 auto;
background: #333;
}
#footer {
position: fixed;
bottom: 5px;
width: 100%;
background: #f63;
text-align: center;
}
</style>
</head>
<body>
<div id="header"></div>
<div id="footer">I am the footer!</div>
</body>
</html>
your footer not ignoring body padding, look through console at that element sizes and you will see that width of your footer is 100% of window width + 10px from left padding + 10px from right padding.
you can use calc function in css: https://developer.mozilla.org/en-US/docs/Web/CSS/calc
#footer {
width: calc(100% - 20px);
}
JSFiddle
Footer width and padding are calculated separately. You can use use box-sizing: border-box to prevent this from happening
Use this for all elements to behave this way
* {
box-sizing: border-box;
}
There is a good video by Travis Neilson on his YouTube channel DevTips, where he explains the box-modal concept.
#footer {
position: fixed;
bottom: 5px;
left: 10px;
right: 10px;
background: #f63;
text-align: center;
}
demo: http://jsbin.com/benosofo/3/
A fixed element is not fixed in relation to the body, it's fixed in relation to the window. If it would be fixed in relation to the body then it would be just as absolute positioning, and it would scroll with the body.
You can make a fixed container for the footer, so that you can use a padding on that.
HTML:
<div id="footercontainer"><div id="footer">I am the footer!</div></div>
CSS:
#footercontainer {
position: fixed;
bottom: 5px;
width: 100%;
padding: 0 10px;
}
#footer {
background: #f63;
text-align: center;
}
None of the solutions in the net worked for me. so I solved it another way. I was trying to create a modal for adding address and was testing it on the mobile mode. I wanted a fixed layer with rgba(0,0,0,0.75) to cover all the window and in the center, a white form appear for the user. the form header was hiding in the top (and unscrollable) and in the bottom, was sticking to the bottom of window which was not looking good (in some cases, some element won't work when they don't have enough space from the window borders).
so I solved the problem by putting a div after the form div in the bottom (to stick to the window bottom instead of my form) and made it transparent. so it worked! (I have to mention that I am writing react code)
this is my div:
<div className="modal-padding"/>
and this is my styling for this div:
.modal-padding {
width: 100%;
border: 10vh solid transparent;
}
I used one, before the form div and one after that.
Be careful. I tested giving a width: 100vw and height: 10vh to the div but when it has no content, it doesn't work, seems it doesn't exist at all. so I gave a border.
I hope this solve your problem too, or give you an idea for solving the issue.
Good luck.
You could make a wrapper for your footer and apply the 10px padding to that instead.
#footer-wrap {
position:fixed;
bottom:0px;
left:0px;
padding:10px;
}
and then when you place your footer inside it will be correctly padded. This way is the most backwards compatible solution as it doesn't rely on css3 calc.
JSFIDDLE
http://jsfiddle.net/pk8uU/
I would like to put footer on the bottom of the page (or bottom of the screen, if page is shorter than a screen). I am using code:
<div id="wrapper">
<div id="header-wrapper">
...
</div> <!--header-wrapper-->
<div class="clear"></div>
<div id="body-wrapper">
<div class="row960">
<div class="menu">...</div>
<div class="content">...</div>
</div> <!--row960-->
</div> <!--body-wrapper-->
<div class="clear"></div>
<div id="footer-wrapper" class="gray">
</div> <!--footer-wrapper-->
</div> <!--wrapper-->
and css:
.clear{
clear:both;
display:block;
overflow:hidden;
visibility:hidden;
width:0;
height:24px;
margin:0px
}
html, body{
margin: 0;
padding: 0;
height: 100%;
width: 100%;
}
body{
background-color: #000000;
color: #FFFFFF;
font-size: 14px;
}
#wrapper{
min-height: 100%;
position: relative;
}
#header-wrapper{
height: 100px;
}
#body-wrapper{
padding-bottom: 50px;
}
#footer-wrapper{
position: absolute;
bottom: 0;
width: 100%;
height: 50px;
}
.row960{
width: 960px;
margin: auto;
overflow: auto;
}
#menu{
width: 200px;
float: left;
}
.content{
width: 740px;
margin-left: 20px;
float: right;
}
The problem is that footer is on the bottom of the screen even if the page is longer than a screen (it covers a text). I've checked it with Firebug and body-wrapper has right height, but row960 has height of screen instead of height of page. I can't figure out how to fix it. Does any one have idea what to do?
You can see my page on http://www.domenblenkus.com/fiap/notice.php
Thanks for your help!
EDIT: I don't know if I emphasized it enough, so I would like to point it out that the main problem is that height of row960 is not right.
Hmmm, I think I have a solution that fits the requirements you stated. There are certainly other ways to do this though, so you can keep looking around if you don't agree with this method. (Also, when I looked on your site it appeared that your #wrappper element was a sibling of #footer-wrapper, and not a parent.)
So, the HTML would look like (structure copied from your site):
<div id="wrappper">
<div id="header-wrapper" class="gray">
<div class="clear"></div>
<div id="body-wrapper"></div>
<div class="clear"></div>
<div class="spacer"></div>
</div>
<div id="footer-wrapper" class="gray"></div>
Note the addition of the .spacer element at the bottom of #wrappper, it's required for this approach of the "sticky footer".
Now, CSS you'll need to add (add to any current definitions if you already have them):
body, html{
height: 100%;
}
#wrappper{
min-height: 100%;
margin-bottom: -50px;
height: auto;
}
.spacer{
height: 50px;
}
If you're wondering why I chose 50px for the height, it's because that's the height of your footer element, #footer-wrapper.
Anyways, I only really tested this in the Firebug console, so I'm not sure how it will behave in a live environment, but I'm fairly certain this will give you what you want. If this isn't what you were looking for, let me know and I'll be happy to help further!
If you want it at the bottom, then you don't need the position:absolute or bottom:0, it will be at the bottom of your div anyway.
You can try doing it using margin. Here is a fiddle of what I'm taking about: http://jsfiddle.net/8WLyP/
Basically for your HTML, place all your content inside a "container" element and then your footer will be a sibling of that element.
Then in your CSS what you will need is to give them html and body elements a min-height: 100%
You "container" element will also have min-height: 100%
You will then need to give your footer a heightof X, in my example it's 50 pixels.
The "container" element will need to have margin-bottom: -50px or whatever value you give the height of the footer.
With all that done, make sure you don't give "container" and "footer" any other margins or paddings than the ones shown, if you need to give them, then you will need to give it to the child elements, in my example p element.
With this technique, as opposed to position: fixed the footer will stick to the bottom of the window if the content is too short, and it will move with the content when the content is bigger than the window/viewport.
HTML:
<div id="container">
<header>
<p>Header</p>
</header>
<section>
<p>Section</p>
</section>
</div>
<footer>
<p>Footer</p>
</footer>
CSS:
html, body, header, footer, section, p, div {
margin: 0;
padding: 0;
}
html, body {
height: 100%;
}
p {
padding: 5px 10px;
}
header {
width: 100%;
background: #f00;
color: #fff;
}
section {
width: 100%;
height: 200px;
background :#0f0;
color: #fff;
}
#container {
width: 100%;
min-height: 100%;
margin-bottom: -50px;
}
footer {
width: 100%;
background :#00f;
color: #fff;
height: 50px;
}
You want to place the footer at the bottom of the content. BUT: You want to have it at the bottom of the viewport (window) if the content above it is shorter.
So, try this:
the CSS:
#footer-wrapper {
position: relative;
width: 100%;
height: 50px;
}
#body-wrapper {
position: relative;
height: 100%;
}
… and the JavaScript (jQuery):
var bodyWrap = $('#body-wrapper'),
footerWrap = $('#footer-wrapper'),
windowHeight = $(window).height();
var heightRemaining = parseInt(windowHeight - bodyWrap.outherHeight() - footerWrap.outerHeight());
if (heightRemaining > 0) bodyWrap.css('min-height', heightRemaining);
Didn't test it due to little time.
Give it a try.
I have a simple HTML page with a sidebar floated to the left and all content to the right. In the main content area I have an <iframe>. However, when I use CSS to set the height of the frame to 100% it seems to overflow the containing div for some reason, resulting in a small amount of white-space after my content.
Here is my HTML content:
<div id="container">
<div id="sidebar">
<p>Sidebar content</p>
</div>
<div id="content">
<iframe id="contentFrame"></iframe>
</div>
</div>
And here is my CSS:
html, body {
height: 100%;
}
#container {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
background-color: grey;
}
#sidebar {
width: 100px;
float: left;
background-color: blue;
height: 100%;
}
#content {
margin-left: 100px;
height: 100%;
background-color: yellow;
}
#contentFrame {
border: none;
padding: 0;
margin: 0;
background-color: pink;
height: 100%;
}
(NOTE: Before anybody asks, #container { position: absolute } is necessary for layout reasons; I can't change that.)
You can see it 'working' on this fiddle: http://jsfiddle.net/9q7yp/
The aim is to get rid of the white band along the bottom of the page (i.e. there shouldn't be a vertical scroll-bar in the result). If I set overflow: hidden for #content then the problem goes away. I'm happy to do this if necessary, but I can't for the life of me work out why it doesn't work without this. Can anyone tell me why?
Try to add
display:block;
to the iframe. http://jsfiddle.net/9q7yp/14/
Edit:
Well, it turns out there's a better solution (both in practice and in understanding what's going on):
Add
vertical-align:bottom;
to iframe#contentFrame. http://jsfiddle.net/9q7yp/17/
<iframe>, as an inline element, has the initial value of vertical-align:baseline, but a height:100% inline element will "push" the base line a few pixels lower (because initially the baseline is a few pixels higher from the bottom),
so the parent DIV is thinking "well content will be 2 pixels lower, I need to make room for that".
You can see this effect in this fiddle (check your browser console and pay attention to the bottom property of both ClientRect object).
Add margin:0 to body
html, body {
height: 100%;
margin:0 auto;
}
WORKING DEMO
Add margin: 0 to your html, body {} section.
...................demo
Hi now give to overflow:hidden; of this id #content
as like this
#content{
overflow:hidden;
}
Live demo