[CSS] About div alignment and web page layout_html/css_WEB-ITnose
The reason why you need to learn the div layout thoroughly is because the table layout is really embarrassing. If they are both in the same table,
The distribution of specifications of each row will not be possible at all.
For example, the following very simple code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><table border="1"><tr><td width="5%">11111111111111</td><td width="85%">11111111111111</td><td width="5%">11111111111111</td><td width="5%">11111111111111</td></tr><tr><td width="5%">11111111111111</td><td width="5%">11111111111111</td><td width="85%">11111111111111</td><td width="5%">11111111111111</td></tr></table></body></html>
But the actual effect is like this:
This is normal, because only the first row in the table layout is effective for the td setting, and the td in the remaining rows The settings will be overwritten by the td settings in the first line.
This problem is very serious, especially for web designers. When you set the border attribute of the table to 0, it is difficult to figure out what happened?
To solve this problem, if you still use table layout, you have two methods. One is to make the two rows not in the same table, and the other is to use table nesting.
But this is too painful, isn’t it? Do you have to use a new table every time you layout? And how does the script number so many tables? How to control?
So the web page layout of table is not very useful and can only be used for in-line layout. The role of table in in-line layout is indeed much more powerful for div.
But div layout can also complete inline layout, but you need to define the float attribute in style, and complete an inline layout, use clear:both in style to wrap the line,
The above layer arrangement is achieved through the following code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>div</title></head><body><!--默认情况下的div对齐--><div style="background:#aa0; width:15%; height:100px;"></div><div style="background:#0a0; width:15%; height:100px;"></div><!--更换对齐方式，必须使用clear:both换行，这个换行符的高度为10px，默认为0px，颜色同网页的背景色--><div style="clear:both; height:10px;"></div><!--使用了行内右对齐的方式，是先写最右图层，再写次右图层，与常人思维相反--><div style="background:#F00; width:10%; height:100px; float:right; margin-right:10%"></div><div style="background:#00f; width:10%; height:100px; float:right;"></div><div style="clear:both; height:10px;"></div><!--使用行内左对齐方式--><div style="background:#0f0; width:10%; height:100px; float:left;"></div><div style="background:#F00; width:10%; height:100px; float:left;"></div><div style="clear:both; height:10px;"></div><div style="background:#00f; width:10%; height:100px; float:left;"></div><!--如果你更换对齐方式，这里是希望从行内左对齐更变成一个无论大小的图层占用一行，而不用clear:both换行的话，这两个图层会叠放在一起，出错--><div style="background:#0af; width:15%; height:100px;"></div><!--此乃正确的使用方式。--><div style="clear:both; height:10px;"></div><div style="background:#aa0; width:15%; height:100px;"></div><div style="background:#0a0; width:15%; height:100px;"></div></body></html>
In the above code, continue to add the following code:
<div style="background:#eee; width:15%; height:100px; position:absolute; top:5%; left:80%;">游离于体系之外</div><div style="background:#aaa; width:100%; height:30px; position:fixed; top:0%;left:0%">游离于体系之外</div><!--下面两个图层，只是为了说明上面两行代码可以放在任何位置，但不影响网页布局之用--><div style="background:#aa0; width:15%; height:100px;"></div><div style="background:#0a0; width:15%; height:100px;"></div>
The layer with position:fixed will always have its head hanging even if the scroll bar is pulled down:
The above about "navigation bar" ” layer and the two lines of code for the “advertisement” layer can be placed anywhere without affecting the network layout. Then, all the code of the web page evolves into the following:
div <div style="background:#eee; width:15%; height:100px; position:absolute; top:5%; left:80%;">游离于体系之外</div><div style="background:#aaa; width:100%; height:30px; position:fixed; top:0%;left:0%">游离于体系之外</div><!--下面两个图层，只是为了说明上面两行代码可以放在任何位置，但不影响网页布局之用--><div style="background:#aa0; width:15%; height:100px;"></div><div style="background:#0a0; width:15%; height:100px;"></div>
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Is HTML easy to learn for beginners?
Apr 07, 2025 am 12:11 AM
HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
What is an example of a starting tag in HTML?
Apr 06, 2025 am 12:04 AM
AnexampleofastartingtaginHTMLis,whichbeginsaparagraph.StartingtagsareessentialinHTMLastheyinitiateelements,definetheirtypes,andarecrucialforstructuringwebpagesandconstructingtheDOM.
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
Gitee Pages static website deployment failed: How to troubleshoot and resolve single file 404 errors?
Apr 04, 2025 pm 11:54 PM
GiteePages static website deployment failed: 404 error troubleshooting and resolution when using Gitee...
How to implement adaptive layout of Y-axis position in web annotation?
Apr 04, 2025 pm 11:30 PM
The Y-axis position adaptive algorithm for web annotation function This article will explore how to implement annotation functions similar to Word documents, especially how to deal with the interval between annotations...
How to use CSS3 and JavaScript to achieve the effect of scattering and enlarging the surrounding pictures after clicking?
Apr 05, 2025 am 06:15 AM
To achieve the effect of scattering and enlarging the surrounding images after clicking on the image, many web designs need to achieve an interactive effect: click on a certain image to make the surrounding...
HTML, CSS, and JavaScript: Essential Tools for Web Developers
Apr 09, 2025 am 12:12 AM
HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.
