绝对定位与XHTML不兼容？ [英] absolute positioning not working with XHTML?
问题描述
我试图定位一个绝对定位的DIV，但是它似乎与XHTML DOCTYPE它不工作。在下面的示例中，红色正方形显示在左上角，而不是位于屏幕中间的某处：
I'm trying to position a DIV with absolute positioning, however it appears that with XHTML DOCTYPE it doesn't work. In the following example, the red square appears at top-left, instead of being somewhere in the middle of the screen :
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" href="" media="screen,projection" />
<style type="text/css">
body { background-color: silver; }
div
{
width: 100px;
height: 100px;
border: 1px solid #000;
}
div#one
{
background-color: red;
position: absolute;
top:520;
left: 220; }
</style>
</head>
<body>
<h1>
This is some text this is some text this is some.
</h1>
<div id="one"></div>
</body>
</html>
如果显示如果我将DOCTYPE替换为：
If appears that if I replace the DOCTYPE to this:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
它可以正常工作，但我想遵循XHTML doctype。
任何想法？
It will work correctly, however I would like to follow XHTML doctype.
Any idea?
推荐答案
将 px 添加到您的 top 和 left 属性：
top: 520px;
left: 220px
使用XHTML doctype（或更精确地：标准模式），浏览器不会假定您的意思是 px 如果你没有明确说明它，而不是怪异模式。
With the XHTML doctype (or more precisely: Standards Mode), the browser will not assume that you mean px if you do not explicitly state it, in contrast to Quirks Mode.
这篇关于绝对定位与XHTML不兼容？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
