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Why is absolute positioning rarely used in DIV CSS layout? _html/css_WEB-ITnose
- WBOYOriginal
- 2016-06-24 12:12:581327browse
例如下边的 绝对定位不是很好用吗？干嘛非得用 #id{float:left;}这样的浮动？可能是我觉得浮动不太好控制吧，当然 用绝对定位不是不可以的这我知道。可是为什么大都是用浮动的呢？<html> <title>无标题文档</title> <style type="text/css"> <!-- #apDiv1 { position:absolute; left:484px; top:104px; width:151px; height:81px; z-index:1; } --> </style> </head> <body> <div id="apDiv1"></div> </body> </html>
Reply to discussion (solution)
Who said absolute positioning is rarely used?
In addition, the code you show is not compatible with all browsers.
You must add position:relative;
to the body, html{position:relative;}, which is the parent of absolute positioning; otherwise, according to your needs, you have to change position:absolute; to position:fixed;
Lan Rani? ? The poster looks like a newbie at first glance, right? ? Floating is easy to control? ? You go ask those veterans whether the float is easy to control. Maybe you have been searching for potential problems for a week and still haven’t found out where the problem lies.
It’s not that there are very few. Specific problems will be analyzed in detail. , see which one is simpler to use and easier to solve compatibility
position:absolute; It is best to set position:relative for the label of its relative position
I don’t think there are very few
Learned
It doesn’t matter what you use for layout, what’s important is that it should be easy to use.
It also depends on your team’s habits or other needs.
The poster can download several foreign xhtml css templates, many of which use position for layout.
Browsers are different
Use absolute positioning. If you change the screen resolution, the position of things in the web page will be offset
I have always used absolute positioning without floating, but Absolute positioning will break away from the document flow and is not conducive to the layout of the entire page. If you want the page to automatically stretch according to the content, you cannot use absolute positioning
Depending on the actual situation, fixed will occasionally change the shape, and floating control More difficult.
After studying positioning thoroughly, I can apply it freely. static (default) relative absolute fixed is very useful.
I basically use floating, and only the pop-up layer uses positioning
The biggest disadvantage of absolute positioning is that a lot of code needs to be rewritten when the browser resizes. Relatively speaking, absolute position compatibility is better.
Floating things are not easy to use, go and see for yourself. .
It is recommended that you take a look at the 1af937eef601ad74ef41a84637d91731> Advanced Web Standard Solution, which explains the various methods of position. Absolute positioning is easy to control, but once you change the layout, it may cover other elements, making maintenance more cumbersome. If you want to write a good page, fluid layout is recommended.
Floating layout is easier to maintain later