0. 目录
原文:github的A collection of useful CSS protips
译者:爱前端乐分享的FedFun,意译为主不当之处,欢迎指正!
译言:提高您CSS开发能力的技巧集,希望对大家有所帮助。
2.1 使用:not()给导航条添加间隔线
我们通常使用如下代码给导航条增加间隔线
/* add border */.nav li { border-right: 1px solid #666;}/* remove border */.nav li:last-child { border-right: none;}
现在,我们可以使用:not()选择符简化操作,代码简洁易读,不错吧。
.nav li:not(:last-child) { border-right: 1px solid #666;}
或者,我们增加左边框。
.nav li:first-child ~ li { border-left: 1px solid #666;}
2.2 给body元素增加Line-Height属性
我们不需要给每个p、h1元素设置line-height,只需要给body元素设置,其他文本元素会自动继承body的特性。
body { line-height: 1;}
2.3 任意元素垂直居中
不是黑魔法,确实可以让任意元素垂直居中。
html, body { height: 100%; margin: 0;}body { -webkit-align-items: center; -ms-flex-align: center; align-items: center; display: -webkit-flex; display: flex;}
2.4 逗号分隔的列表
让html列表貌似现实中逗号分隔的列表
ul > li:not(:last-child)::after { content: ",";}
2.5 在nth-child中使用负数
在css的nth-child中使用负数选择1~n条记录。
li { display: none;}/* select items 1 through 3 and display them */li:nth-child(-n+3) { display: block;}
2.6 使用svg图标
没有理由不使用svg图标,在大多数分辨率和浏览器里能够实现缩放,甚至兼容到IE9,所以不用再用.png、.gif等等。
.logo { background: url("logo.svg");}
2.7 文本显示优化
一些字体不能再所有设备中最优展示,所以需要设置。
html { -moz-osx-font-smoothing: grayscale; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;}
注意optimizeLegibility属性值的使用问题,同时IE/Edge不支持text-rendering。
2.8 在Pure CSS Sliders中使用max-height
使用max-height实现隐藏、显示的动画。
.slider ul { max-height: 0; overlow: hidden;}.slider:hover ul { max-height: 1000px; transition: .3s ease;}
参见本博《Auto值的CSS3 Transition解决方案》
2.9 初始化box-sizing
从html中继承box-sizing属性,这样的话,后期维护比较方便。
html { box-sizing: border-box;}*, *:before, *:after { box-sizing: inherit;}
2.10 表格单元格等宽
.calendar { table-layout: fixed;}
2.11 使用Flexbox摆脱各种Margin Hacks
在实现侧栏时,我们不再需要各种nth-、first-和last-child等设置margin,可以使用Flexbox轻松实现均匀分布。
.list { display: flex; justify-content: space-between;}.list .person { flex-basis: 23%;}
2.12 给空连接使用属性选择符
对于那些拥有href属性但是内容为空的a,自动添加内容。
a[href^="http"]:empty::before { content: attr(href);}
非常方便,是吧。
3. 声明
The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

The roles of HTML, CSS and JavaScript in web development are: HTML is responsible for content structure, CSS is responsible for style, and JavaScript is responsible for dynamic behavior. 1. HTML defines the web page structure and content through tags to ensure semantics. 2. CSS controls the web page style through selectors and attributes to make it beautiful and easy to read. 3. JavaScript controls web page behavior through scripts to achieve dynamic and interactive functions.

HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.

The role of HTML is to define the structure and content of a web page through tags and attributes. 1. HTML organizes content through tags such as , making it easy to read and understand. 2. Use semantic tags such as, etc. to enhance accessibility and SEO. 3. Optimizing HTML code can improve web page loading speed and user experience.

HTMLisaspecifictypeofcodefocusedonstructuringwebcontent,while"code"broadlyincludeslanguageslikeJavaScriptandPythonforfunctionality.1)HTMLdefineswebpagestructureusingtags.2)"Code"encompassesawiderrangeoflanguagesforlogicandinteract


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