質問
Any ideas why the footer is not centering in the following code?
https://stackoverflow.com/questions/23684179
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Russian<html>
<head>
<style>
#container {width:1000px;margin:0 auto;}
#footer {margin:0 auto;}
</style>
</head>
<body>
<div id="container">
<div>
lksdfkjjindskfjsfkjflskfjsls.....sdlfkajsf
sdfkjkkdiidkdkn asdflkajf;lskdfioasfnasldf ;lkjlthis is just a testing
' sdlfk sdlfk dslfkjsf lskdfjsaf this elobrate asdfkj
sdlfk sldkfjsodsf lsdkfj dlkjhgkjhgkjhg
</div>
<div id="footer">
copyright 2014
</div>
</div>
</body>
</html>
解決
By default a div is a block element. This means it has . width: 100%;margin: 0 auto; will center the element but how can it do that if its width: 100%.
For that matter!
Actually it has width: auto, which for a block-level element is the full width of its container - but that's not 100% because otherwise padding would make it overflow - Niet the Dark Absol
CSS:
#footer { width: 200px; margin:0 auto;}
Also you could just text-align: center;
他のヒント
Setting a width would resolve, but you would have to calculate the exact width for it, and when the footer changes, you will need to recalculate and update the width property as well.
A nice solution to that would be setting the display to table, so the width issue will automatically be resolved:
#footer {
margin:0 auto;
display: table;
}
#footer { text-align: center;
margin-left: auto ;
margin-right: auto ;
}
try this it will work perfect
copy this to the demo on http://jsfiddle.net/WJw5H/15/
<div id="container">
this is just a test.
</div>
<div id="footer">
copyright 2014
</div>
#container {width:1000px;margin:0 auto;}
#footer { text-align: center;
margin-left: auto ;
margin-right: auto ;
