如何将页脚(div)对齐到页面底部？

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This will make the div fixed at the bottom of the page but in case the page is long it will only be visible when you scroll down.

<style type="text/css">
#footer {
position : absolute;
bottom : 0;
height : 40px;
margin-top : 40px;
}
</style>
<div id="footer">I am footer</div>

The height and margin-top should be the same so that the footer doesnt show over the content.

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最佳答案

UPDATE

My original answer is from a long time ago, and the links are broken; updating it so that it continues to be useful.

I'm including updated solutions inline, as well as a working examples on JSFiddle. Note: I'm relying on a CSS reset, though I'm not including those styles inline. Refer to normalize.css

Solution 1 - margin offset

https://jsfiddle.net/UnsungHero97/ur20fndv/2/

HTML

<div id="wrapper">
<div id="content">
<h1>Hello, World!</h1>
</div>
</div>
<footer id="footer">
<div id="footer-content">Sticky Footer</div>
</footer>

CSS

html, body {
margin: 0px;
padding: 0px;
min-height: 100%;
height: 100%;
}


#wrapper {
background-color: #e3f2fd;
min-height: 100%;
height: auto !important;
margin-bottom: -50px; /* the bottom margin is the negative value of the footer's total height */
}


#wrapper:after {
content: "";
display: block;
height: 50px; /* the footer's total height */
}


#content {
height: 100%;
}


#footer {
height: 50px; /* the footer's total height */
}


#footer-content {
background-color: #f3e5f5;
border: 1px solid #ab47bc;
height: 32px; /* height + top/bottom paddding + top/bottom border must add up to footer height */
padding: 8px;
}

Solution 2 - flexbox

https://jsfiddle.net/UnsungHero97/oqom5e5m/3/

HTML

<div id="content">
<h1>Hello, World!</h1>
</div>
<footer id="footer">Sticky Footer</footer>

CSS

html {
height: 100%;
}


body {
display: flex;
flex-direction: column;
min-height: 100%;
}


#content {
background-color: #e3f2fd;
flex: 1;
padding: 20px;
}


#footer {
background-color: #f3e5f5;
padding: 20px;
}

Here's some links with more detailed explanations and different approaches:

ORIGINAL ANSWER

Is this what you mean?

http://ryanfait.com/sticky-footer/

This method uses only 15 lines of CSS and hardly any HTML markup. Even better, it's completely valid CSS, and it works in all major browsers. Internet Explorer 5 and up, Firefox, Safari, Opera and more.

This footer will stay at the bottom of the page permanently. This means that if the content is more than the height of the browser window, you will need to scroll down to see the footer... but if the content is less than the height of the browser window, the footer will stick to the bottom of the browser window instead of floating up in the middle of the page.

Let me know if you need help with the implementation. I hope this helps.

小开

check this out, works on firefox and IE

<style>
html, body
{
height: 100%;
}
.content
{
min-height: 100%;
}
.footer
{
position: relative;
clear: both;
}
</style>


<body>
<div class="content">Page content
</div>
<div class="footer">this is my footer
</div>
</body>

小开

Your title and comments imply that you weren't looking for a sticky footer (stuck to the bottom of the window as content scrolls below it). I assume you were looking for a footer that would be forced to the bottom of the window if the content does not fill the window, and push down to the bottom of the content if the content exceeds the window boundary.

You can accomplish this with the following.

<style>
html,
body {
margin:0;
padding:0;
height:100%;
}
#container {
min-height:100%;
position:relative;
}
#header {
background:#ff0;
padding:10px;
}
#body {
padding:10px;
padding-bottom:60px;   /* Height of the footer */
}
#footer {
position:absolute;
bottom:0;
width:100%;
height:60px;   /* Height of the footer */
background:#6cf;
}
</style>


<div id="container">
<div id="header">header</div>
<div id="body">body</div>
<div id="footer">footer</div>
</div>

Source: How to keep footers at the bottom of the page

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I am a newbie and these methods are not working for me. However, I tried a margin-top property in css and simply added the value of content pixels +5.

Example: my content layout had a height of 1000px so I put a margin-top value of 1005px in the footer css which gave me a 5px border and a footer that sits delightfully at the bottom of my site.

Probably an amateur way of doing it, but EFFECTIVE!!!

小开

Use

<div style="position:fixed; bottom:0; height:auto; margin-top:40px;
width:100%; text-align:center">
I am footer
</div>

Footer will not go upwards

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A simple solution that i use, works from IE8+

Give min-height:100% on html so that if content is less then still page takes full view-port height and footer sticks at bottom of page. When content increases the footer shifts down with content and keep sticking to bottom.

JS fiddle working Demo: http://jsfiddle.net/3L3h64qo/2/

Css

html{
position:relative;
min-height: 100%;
}
/*Normalize html and body elements,this style is just good to have*/
html,body{
margin:0;
padding:0;
}
.pageContentWrapper{
margin-bottom:100px;/* Height of footer*/
}
.footer{
position: absolute;
bottom: 0;
left: 0;
right: 0;
height:100px;
background:#ccc;
}

Html

   <html>
<body>
<div class="pageContentWrapper">
<!-- All the page content goes here-->
</div>
<div class="footer">
</div>
</body>
</html>