作为一个前端攻城狮,CSS那绝对是基础,可是基础也有掌握不牢的时候。今天就来总结一下容易写错的CSS属性简写问题。
1、background
背景颜色:background-color 基本语法:background-color : transparent | color
背景图像:background-image 基本语法:background-image : none | url ( url )
背景图像铺排:background-repeat 基本语法:background-repeat : repeat | no-repeat | repeat-x | repeat-y
背景图像滚动还是固定:background-attachment 基本语法:background-attachment : scroll | fixed
背景图像位置:background-position 基本语法:background-position : length || length或 background-position : position || position
length : 百分数 | 由浮点数字和单位标识符组成的长度值。请参阅 长度单位
position : top | center | bottom | left | center | right
以上是经常用到的background属性,大家一般都很熟悉,
其简写方式为:background : background-color || background-image || background-repeat || background-attachment || background-position
可是随着css的发展CSS3中又引入了其他4个属性:
背景的裁剪区域:background-clip 基本语法:background-clip : border-box | padding-box | content-box | no-clip
border-box:从border区域向外裁剪背景。
padding-box:从padding区域向外裁剪背景。
content-box:从content区域向外裁剪背景。
no-clip:从border区域向外裁剪背景。
背景显示区域:background-origin 基本语法:background-origin : border | padding | content
设置背景图片大小:background-size 基本语法:background-size :[
多重背景background : [background-image] | [background-origin] | [background-clip] | [background-repeat] | [background-size] | [background-position]
例如:background: url(img/multiple-backgrounds.png) left top no-repeat, url(img/multiple-backgrounds.png) -320px bottom no-repeat, url(img/multiple-backgrounds.png) -640px top repeat-y;
终于完了!这么多属性怎么简写呢?
查了好多资料终于找到了,好东西就该拿出来分享:
其简写方式为:background: background-color||background-image||background-repeat||background-attachment||background-position / background-size||background-origin||background-clip;
注意里面的反斜杠,它更font和border-radius里简写方式使用的反斜杠的用法相似。
例如:background: red url("images/1.jpg") no-repeat scroll center center / 50% content-box content-box;
2、font
字体样式:font-style 基本语法:font-style : normal | italic | oblique
设置文本是否为小型的大写字母:font-variant 基本语法:font-variant : normal | small-caps
设置字体的粗细: font-weight 基本语法:font-weight : normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900
设置字体尺寸 :font-size 基本语法:font-size : xx-small | x-small | small | medium | large | x-large | xx-large | larger |smaller | length
设置文本的字体名称序列: font-family 基本语法:font-family : ncursive | fantasy | monospace | serif | sans-serif
其简写方式为:font-style || font-variant || font-weight || font-size /line-height || font-family
例如:font:italic small-caps bold 12px/1.5em arial,verdana;
3、margin & padding 以margin为例,padding相同
其简写方式为:margin:margin-top margin-right margin-bottom margin-left;
例如:margin:1px 1px 1px 1px;
4、border
边框宽度:border-weight 基本语法:border-width : medium | thin | thick | length
边框样式:border-style 基本语法:border-style : none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset
边框颜色: border-color 基本语法:border-width :color
其简写方式为:border : border-width || border-style || border-color
例如:border:1px solid #000;
5、outline
outline类似border,不同的是border会影响盒模型,而outline不会。
其简写方式为:outline : outline-width || outline-style || outline-color
例如:outline:1px solid red;
6、border-radius
右上角半径:border-top-right-radius ,
右下角半径:border-bottom-right-radius ,
左下角半径:border-bottom-left-radius ,
左上角半径:border-top-left-radius
当各个圆角半径相同时其简写方式为:border-radius :border-top-right-radius border-bottom-right-radius border-bottom-left-radius border-top-left-radius;
例如:border-radius:0 6px 6px 6px;一般简写为 border-radius:0 6px 6px;
当各个圆角半径不同时其简写方式为:border-radius : none |
例如:border-radius:0px 5px 10px 15px/20px 15px 10px 5px;按照上有下左的规律依次写出每个角的两条边的半径
7、color的简写就不说了,太简单了
不知道总结的好不好,若有错烦指出,谢谢!

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.

HTML is used to build websites with clear structure. 1) Use tags such as, and define the website structure. 2) Examples show the structure of blogs and e-commerce websites. 3) Avoid common mistakes such as incorrect label nesting. 4) Optimize performance by reducing HTTP requests and using semantic tags.

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

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.

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


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

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

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

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools
