代码如下,可以直接复制粘贴到文档中,然后运行实例。
<code class="language-html"> <meta charset="UTF-8"> <title>纯css写的手风琴切换实例</title> <meta name="keywords" content="css3学习,css3属性详解,css3 transition,如何学好css3"> <style type="text/css"> ul,li{ list-style:none; margin:0; -webkit-padding-start: 0; } .page{ width:602px; } #accordion{ border:1px solid #D2D2D2; border-top:none; width:600px; } #accordion input[type='radio']{ display:none; } #accordion label{ display:block; font-size:16px; background-color:#F4F4F4; border-top:1px solid #D2D2D2; line-height:36px; font-weight:bold; } #accordion label:before{ content:"\2610"; background-color:#fff; width:19px; height:19px; -moz-border-radius:10px; -webkit-border-radius:10px; border-radius:10px; text-align:center; margin:0 5px; box-shadow:0 0 1px rgba(0,0,0,0.5); display:inline-block;*display:inline;*zoom:1; line-height:19px; vertical-align:middle; } #accordion .accordion-content{ height:0; overflow:hidden; -webkit-transition:height 0.3s ease; -moz-transition:height 0.3s ease; -ms-transition:height 0.3s ease; -o-transition:height 0.3s ease; transition:height 0.3s ease; } #accordion .accordion-content p{ margin:10px; } #accordion input:checked + label:before{ content:"\2611"; color:#f00; box-shadow:0 0 2px rgba(255,0,0,0.5); } #accordion input:checked ~ .accordion-content{ height:100px; } </style> <div class="page"> <ul class="nostyle" id="accordion"> <li> <input type="radio" id="ac-1" name="accordion-1" checked> <label for="ac-1">青,取之于蓝,而青于蓝</label> <div class="accordion-content"> <p> 学恶乎始?恶乎终?曰:其数则始乎诵经,终乎读礼;其义则始乎为士,终乎为圣人, 真积力久则入,学至乎没而后止也。故学数有终,若其义则不可须臾舍也。为之,人也;舍 之,禽兽也。故书者,政事之纪也;诗者,中声之所止也;礼者,法之大分,类之纲纪也。故学至乎礼而止矣。夫是之谓道德之极。礼之敬文也,乐之中和也,诗书之博也,春秋之微 也,在天地之间者毕矣。君子之学也,入乎耳,着乎心,布乎四体,形乎动静。端而言,蝡而动,一可以为法则。小人之学也,入乎耳,出乎口;口耳之间,则四寸耳,曷足以美七尺之躯哉!古之学者为己,今之学者为人。君子之学也,以美其身;小人之学也,以为禽犊。故不问而告谓之傲,问一而告二谓之囋。傲、非也,囋、非也;君子如响矣。 </p> </div> </li> <li> <input type="radio" id="ac-2" name="accordion-1"> <label for="ac-2">冰,水为之,而寒于水</label> <div class="accordion-content"> <p> 积土成山,风雨兴焉;积水成渊,蛟龙生焉;积善成德,而神明自得,圣心备焉。故不积跬步,无以至千里;不积小流,无以成江海。骐骥一跃,不能十步;驽马十驾,功在不舍。锲而舍之,朽木不折;锲而不舍,金石可镂。蚓无爪牙之利,筋骨之强,上食埃土,下饮黄泉,用心一也。蟹六跪而二螯,非蛇鳝之穴无可寄托者,用心躁也。 </p> </div> </li> <li> <input type="radio" id="ac-3" name="accordion-1"> <label for="ac-3">君子博学而日参省乎己</label> <div class="accordion-content"> <p> 学恶乎始?恶乎终?曰:其数则始乎诵经,终乎读礼;其义则始乎为士,终乎为圣人, 真积力久则入,学至乎没而后止也。故学数有终,若其义则不可须臾舍也。为之,人也;舍 之,禽兽也。故书者,政事之纪也;诗者,中声之所止也;礼者,法之大分,类之纲纪也。故学至乎礼而止矣。夫是之谓道德之极。礼之敬文也,乐之中和也,诗书之博也,春秋之微 也,在天地之间者毕矣。君子之学也,入乎耳,着乎心,布乎四体,形乎动静。端而言,蝡而动,一可以为法则。小人之学也,入乎耳,出乎口;口耳之间,则四寸耳,曷足以美七尺之躯哉!古之学者为己,今之学者为人。君子之学也,以美其身;小人之学也,以为禽犊。故不问而告谓之傲,问一而告二谓之囋。傲、非也,囋、非也;君子如响矣。 </p> </div> </li> <li> <input type="radio" id="ac-4" name="accordion-1"> <label for="ac-4">君子学不可以已</label> <div class="accordion-content"> <p> 积土成山,风雨兴焉;积水成渊,蛟龙生焉;积善成德,而神明自得,圣心备焉。故不积跬步,无以至千里;不积小流,无以成江海。骐骥一跃,不能十步;驽马十驾,功在不舍。锲而舍之,朽木不折;锲而不舍,金石可镂。蚓无爪牙之利,筋骨之强,上食埃土,下饮黄泉,用心一也。蟹六跪而二螯,非蛇鳝之穴无可寄托者,用心躁也。 </p> </div> </li> </ul> </div> </code>

The function of HTML is to define the structure and content of a web page, and its purpose is to provide a standardized way to display information. 1) HTML organizes various parts of the web page through tags and attributes, such as titles and paragraphs. 2) It supports the separation of content and performance and improves maintenance efficiency. 3) HTML is extensible, allowing custom tags to enhance SEO.

The future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

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.


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