


1、CSS的border属性
⑴定义和用法
border 简写属性在一个声明设置所有的边框属性。
可以按顺序设置如下属性:
border-width
border-style
border-color
如果不设置其中的某个值,也不会出问题,比如 border:solid #ff0000; 也是允许的。
值 | 描述 |
border-width | 规定边框的宽度。 |
border-style | 规定边框的样式。例如,solid、dashed、dotted、none。 |
border-color | 规定边框的颜色。 |
width:200px; height:200px; border:1px dashed red;
⑵分别设置border的上、下、左、右
width:200px; height:200px; border-right:1px dashed red; border-left:1px dashed red; border-top:1px solid red; border-bottom:1px dotted red;
2、CSS的background属性
⑴背景颜色
background-color:#0000FF;
⑵背景图片
background-image:url("../image/clear.png");
⑶背景图片重复
background-repeat:repeat;/*默认值*/
background-repeat:repeat-x;
background-repeat:repeat-y;
background-repeat:no-repeat;
⑷背景图片位置
background-position:50px 100px;
⑸拉伸背景图片
background-repeat:no-repeat; background-size:cover;
⑹背景图片固定
body{ background-image:url("../image/clear.png"); background-repeat:no-repeat; background-attachment:fixed;}
3、表格样式
⑴表格的标题
<table border=“1”> <caption>2004~2007年度收入</caption> <tr><th>2004</th><th>2005</th><th>2006</th><th>2007</th></tr> <tr><td>1234</td><td>2345</td><td>3456</td><td>4567</td></tr></table>
table{ caption-side:bottom;}
⑵表格的边框
table{ border:1px solid red;}
⑶边框重叠
th,td{ border:1px solid red;}
th,td{ border:1px solid red;}table{ border-collapse:collapse;}
⑷行的表头、列的表头
th scope="col"th scope="row"
示例代码:
<table summary="This table shows the yearly income for years 2004 through 2007" border="1"> <caption>年度收入 2004 - 2007</caption> <tr> <th></th> <th scope="col">2004</th> <th scope="col">2005</th> <th scope="col">2006</th> <th scope="col">2007</th> </tr> <tr> <th scope="row">拨款</th> <td>11,980</td> <td>12,650</td> <td>9,700</td> <td>10,600</td> </tr> <tr> <th scope="row">捐款</th> <td>4,780</td> <td>4,989</td> <td>6,700</td> <td>6,590</td> </tr> <tr> <th scope="row">投资</th> <td>8,000</td> <td>8,100</td> <td>8,760</td> <td>8,490</td> </tr> <tr> <th scope="row">募捐</th> <td>3,200</td> <td>3,120</td> <td>3,700</td> <td>4,210</td> </tr> <tr> <th scope="row">销售</th> <td>28,400</td> <td>27,100</td> <td>27,950</td> <td>29,050</td> </tr> <tr> <th scope="row">杂费</th> <td>2,100</td> <td>1,900</td> <td>1,300</td> <td>1,760</td> </tr> <tr> <th scope="row">总计</th> <td>58,460</td> <td>57,859</td> <td>58,110</td> <td>60,700</td> </tr></table>
4、超链接
⑴去掉超链接的下划线
a{ text-decoration:none;}
⑵效果
a:link{ color:red;/*未访问时的颜色*/} a:visited{ color:green;/*已经访问过的颜色*/} a:hover{ color:blue;/*鼠标悬停的颜色*/ cursor:pointer;} a:active{ color:orange;/*鼠标点击时的颜色*/}
5、CSS的 overflow 属性
所有主流浏览器都支持 overflow 属性。overflow 属性规定当内容溢出元素框时发生的事情。
值 | 描述 |
visible | 默认值。内容不会被修剪,会呈现在元素框之外。 |
hidden | 内容会被修剪,并且其余内容是不可见的。 |
scroll | 内容会被修剪,但是浏览器会显示滚动条以便查看其余的内容。 |
auto | 如果内容被修剪,则浏览器会显示滚动条以便查看其余的内容。 |
6、一个工具
FireFox浏览器的插件Firebug

The official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,

The article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.

This article demonstrates efficient PNG border addition to webpages using CSS. It argues that CSS offers superior performance compared to JavaScript or libraries, detailing how to adjust border width, style, and color for subtle or prominent effect

Article discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.

The article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159

The article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex

This article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit

The article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version
Visual web development tools

Notepad++7.3.1
Easy-to-use and free code editor

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft
