search
HomeWeb Front-endHTML TutorialCommonly used methods and techniques for DIV CSS web page layout [transfer]_html/css_WEB-ITnose

CSS布局常用的方法
float:none|left|right 
取值:
none:?默认值。对象不飘浮
left:?文本流向对象的右边
right:?文本流向对象的左边 

它是怎样工作的,看个一行两列的例子 
xhtml代码:

Example Source Code [www.52css.com]

 
这里是第一列
 
这里是第二列
 
 /*这是违背web标准意图的,只是想说明在它下面的元素需要清除浮动*/ 


CSS代码:

Example Source Code [www.52css.com]

#wrap{width:100;height:auto;} 
#column1{float:left;width:40;} 
#column2{float:right;width:60;} 
.clear{clear:both;}



position:static|absolute|fixed|relative
取值:
static:?默认值。无特殊定位,对象遵循HTML定位规则
absolute:?将对象从文档流中拖出,使用left,right,top,bottom等属性相对于其最接近的一个最有定位设置的父对象进行绝对定位。如果不存在这样的父对象,则依据body对象。而其层叠通过z-index属性定义
fixed:?未支持。对象定位遵从绝对(absolute)方式。但是要遵守一些规范
relative:?对象不可层叠,但将依据left,right,top,bottom等属性在正常文档流中偏移位置 

它来实现一行两列的例子 
xhtml代码:

Example Source Code [www.52css.com]

 
这里是第一列
 
这里是第二列
 


CSS代码:

Example Source Code [www.52css.com]

#wrap{position:relative;/*相对定位*/width:770px;} 
#column1{position:absolute;top:0;left:0;width:300px;} 
#column2{position:absolute;top:0;right:0;width:470px;} 


他们的区别在哪?
显然,float是相对定位的,会随着浏览器的大小和分辨率的变化而改变,而position就不行了,所以一般情况下还是float布局!

CSS常用布局实例
单行一列

Example Source Code [www.52css.com]

body{margin:0px;padding:0px;text-align:center;} 
#content{margin-left:auto;margin-right:auto;width:400px;} 


两行一列 

Example Source Code [www.52css.com]

body{margin:0px;padding:0px;text-align:center;} 
#content-top{margin-left:auto;margin-right:auto;width:400px;} 
#content-end{margin-left:auto;margin-right:auto;width:400px;} 


三行一列

Example Source Code [www.52css.com]

body{margin:0px;padding:0px;text-align:center;} 
#content-top{margin-left:auto;margin-right:auto;width:400px;width:370px;} 
#content-mid{margin-left:auto;margin-right:auto;width:400px;} 
#content-end{margin-left:auto;margin-right:auto;width:400px;}


单行两列

Example Source Code [www.52css.com]

#bodycenter{width:700px;margin-right:auto;margin-left:auto;overflow:auto;} 
#bodycenter#dv1{float:left;width:280px;} 
#bodycenter#dv2{float:right;width:420px;} 


两行两列

Example Source Code [www.52css.com]

#header{width:700px;margin-right:auto;margin-left:auto;overflow:auto;} 
#bodycenter{width:700px;margin-right:auto;margin-left:auto;overflow:auto;} 
#bodycenter#dv1{float:left;width:280px;} 
#bodycenter#dv2{float:right;width:420px;} 


三行两列

Example Source Code [www.52css.com]

#header{width:700px;margin-right:auto;margin-left:auto;} 
#bodycenter{width:700px;margin-right:auto;margin-left:auto;} 
#bodycenter#dv1{float:left;width:280px;} 
#bodycenter#dv2{float:right;width:420px;} 
#footer{width:700px;margin-right:auto;margin-left:auto;overflow:auto;clear:both;} 



单行三列
绝对定位 

Example Source Code [www.52css.com]

#left{position:absolute;top:0px;left:0px;width:120px;} 
#middle{margin:0px190px0px190px;} 
#right{position:absolute;top:0px;right:0px;width:120px;} 



float定位一
xhtml代码:

Example Source Code [www.52css.com]

 
 
这里是第一列
 
这里是第二列
 
/*用法web标准不建议,但是记住下面元素需要清除浮动*/ 
 
这里是第三列
 
/*用法web标准不建议,但是记住下面元素需要清除浮动*/ 
 
CSS代码:

Example Source Code [www.52css.com]

#wrap{width:100;height:auto;} 
#column{float:left;width:60;} 
#column1{float:left;width:30;} 
#column2{float:right;width:30;} 
#column3{float:right;width:40;} 
.clear{clear:both;} 



float定位二
xhtml代码:

Example Source Code [www.52css.com]

 

Thisisthemaincontent.

 
 
 

Thisistheleftsidebar.

 
 
 

Thisistherightsidebar.

 

CSS代码:

Example Source Code [www.52css.com]

body{ 
margin:0; 
padding-left:200px;/*LCfullwidth*/ 
padding-right:190px;/*RCfullwidth CCpadding*/ 
min-width:200px;/*LCfullwidth CCpadding*/ 

.column{ 
position:relative; 
float:left; 

#center{ 
width:100; 

#left{ 
width:200px;/*LCwidth*/ 
right:200px;/*LCfullwidth*/ 
margin-left:-100; 

#right{ 
width:190px;/*RCwidth*/ 
margin-right:-100; 
}

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How do you insert an image into an HTML page?How do you insert an image into an HTML page?May 04, 2025 am 12:02 AM

ToinsertanimageintoanHTMLpage,usethetagwithsrcandaltattributes.1)UsealttextforaccessibilityandSEO.2)Implementsrcsetforresponsiveimages.3)Applylazyloadingwithloading="lazy"tooptimizeperformance.4)OptimizeimagesusingtoolslikeImageOptimtoreduc

HTML's Purpose: Enabling Web Browsers to Display ContentHTML's Purpose: Enabling Web Browsers to Display ContentMay 03, 2025 am 12:03 AM

The core purpose of HTML is to enable the browser to understand and display web content. 1. HTML defines the web page structure and content through tags, such as, to, etc. 2. HTML5 enhances multimedia support and introduces and tags. 3.HTML provides form elements to support user interaction. 4. Optimizing HTML code can improve web page performance, such as reducing HTTP requests and compressing HTML.

Why are HTML tags important for web development?Why are HTML tags important for web development?May 02, 2025 am 12:03 AM

HTMLtagsareessentialforwebdevelopmentastheystructureandenhancewebpages.1)Theydefinelayout,semantics,andinteractivity.2)SemantictagsimproveaccessibilityandSEO.3)Properuseoftagscanoptimizeperformanceandensurecross-browsercompatibility.

Explain the importance of using consistent coding style for HTML tags and attributes.Explain the importance of using consistent coding style for HTML tags and attributes.May 01, 2025 am 12:01 AM

A consistent HTML encoding style is important because it improves the readability, maintainability and efficiency of the code. 1) Use lowercase tags and attributes, 2) Keep consistent indentation, 3) Select and stick to single or double quotes, 4) Avoid mixing different styles in projects, 5) Use automation tools such as Prettier or ESLint to ensure consistency in styles.

How to implement multi-project carousel in Bootstrap 4?How to implement multi-project carousel in Bootstrap 4?Apr 30, 2025 pm 03:24 PM

Solution to implement multi-project carousel in Bootstrap4 Implementing multi-project carousel in Bootstrap4 is not an easy task. Although Bootstrap...

How does deepseek official website achieve the effect of penetrating mouse scroll event?How does deepseek official website achieve the effect of penetrating mouse scroll event?Apr 30, 2025 pm 03:21 PM

How to achieve the effect of mouse scrolling event penetration? When we browse the web, we often encounter some special interaction designs. For example, on deepseek official website, �...

How to modify the playback control style of HTML videoHow to modify the playback control style of HTML videoApr 30, 2025 pm 03:18 PM

The default playback control style of HTML video cannot be modified directly through CSS. 1. Create custom controls using JavaScript. 2. Beautify these controls through CSS. 3. Consider compatibility, user experience and performance, using libraries such as Video.js or Plyr can simplify the process.

What problems will be caused by using native select on your phone?What problems will be caused by using native select on your phone?Apr 30, 2025 pm 03:15 PM

Potential problems with using native select on mobile phones When developing mobile applications, we often encounter the need for selecting boxes. Normally, developers...

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.