CSS 伪类 (Pseudo-classes) 实例
CSS 实例
01超链接
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>01超链接</title> <style type="text/css"> body { background-color: #99CCFF; } a:link { color: #CCCCCC; } a:visited { color: #666666; } a:hover { color: #ffffff; } a:active { color: #999999; } </style> </head> <body> <p><b><a href="https://www.baidu.com/" target="_blank">百度首页</a></b></p> <p><b>注释：</b>在 CSS 定义中，a:hover 必须位于 a:link 和 a:visited 之后，这样才能生效！</p> <p><b>注释：</b>在 CSS 定义中，a:active 必须位于 a:hover 之后，这样才能生效！</p> <img src="/static/imghwm/default1.png" data-src="love.jpg" class="lazy" alt="W3School-CSS 伪类 (Pseudo-classes) 实例_html/css_WEB-ITnose" > </body></html> 02超链接2
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>02超链接2</title> <style type="text/css"> body { background-color: #99ccff; } a.one:link {color: #666;} a.one:visited {color: #333;} a.one:hover {color: #ffffff;} a.two:link {color: #666;} a.two:visited {color: #333;} a.two:hover {font-size: 150%;} a.three:link {color: #666;} a.three:visited {color: #333;} a.three:hover {background-color: #CCCCCC;} a.four:link {color: #666;} a.four:visited {color: #333;} a.four:hover {font-family: monospace;} a.five:link {color: #666;text-decoration: none;} a.five:visited {color: #333;text-decoration: none;} a.five:hover {text-decoration: underline;} </style> </head> <body> <p><b><a class="one" href="https://www.baidu.com/" target="_blank">改变颜色</a></b></p> <p><b><a class="two" href="https://www.baidu.com/" target="_blank">改变字体大小</a></b></p> <p><b><a class="three" href="https://www.baidu.com/" target="_blank">改变背景颜色</a></b></p> <p><b><a class="four" href="https://www.baidu.com/" target="_blank">As a man thinketh in his heart so is he！改变字体</a></b></p> <p><b><a class="five" href="https://www.baidu.com/" target="_blank">改变文本装饰</a></b></p> </body></html> 03超链接：:focus 的使用
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>03超链接：:focus 的使用</title> <style type="text/css"> input:focus { background-color: #ccc; } </style> </head> <body> <form> <p>First name: <input type="text" /> </p> <p>Last name: <input type="text" /> </p> <p> <input type="submit" value="Submit" /> </p> </form> </body></html> 04 :first-child（首个子对象)
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>04:first-child（首个子对象）</title> <style type="text/css"> p:first-child { color: green; } li:first-child { text-transform: uppercase; } </style> </head> <body> <div> <p>These are the necessary steps:</p> <ul> <li>Intert Key</li> <li>Turn key <strong>clockwise</strong></li> <li>Push accelerator</li> </ul> <p>Do <em>not</em> push the brake at the same time as the accelerator.</p> </div> </body></html> 05 :lang（语言)
<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title>05 :lang（语言）</title> <style type="text/css"> q:lang(no) { quotes: "~" "~"; } </style> </head> <body> <p>:lang 伪类允许您为不同的语言定义特殊的规则。在下面的例子中，在下面的例子中，:lang 类为带有值为 "no" 的 lang 属性的 q 元素定义引号的类型：</p> <p>一些文本 <q lang="no">段落中的引用</q> 一些文本。</p> </body></html> CSS 伪类 (Pseudo-classes) 总结
The Future of HTML, CSS, and JavaScript: Web Development TrendsApr 19, 2025 am 12:02 AMThe 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.
HTML: The Structure, CSS: The Style, JavaScript: The BehaviorApr 18, 2025 am 12:09 AMThe 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: Evolution and Trends in Web DesignApr 17, 2025 am 12:12 AMThe 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.
HTML vs. CSS vs. JavaScript: A Comparative OverviewApr 16, 2025 am 12:04 AMThe 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.
HTML: Is It a Programming Language or Something Else?Apr 15, 2025 am 12:13 AMHTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.
HTML: Building the Structure of Web PagesApr 14, 2025 am 12:14 AMHTML 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.
From Text to Websites: The Power of HTMLApr 13, 2025 am 12:07 AMHTML 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.
Understanding HTML, CSS, and JavaScript: A Beginner's GuideApr 12, 2025 am 12:02 AMWebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
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