1.font-family
不限长度的字体列表,字体包含空格须用引号包含如:"Times Now Roman"
通用字体族(所有操作系统都可用,作为备用字体放在列表末尾)
通用字体 | 包含的相关字体 |
serif | Times, Times New Roman |
sans-serif (sans指无额外装饰,比serif更易阅读) |
Arial, Helvetica |
monospace | Courier, Courier New |
2.font-size
不指定时,浏览器默认为16px(=1em)
在所有浏览器显示相同文本大小并允许缩放的解决方案——百分比+em:
<span style="color: #008080;">1</span> <span style="color: #800000;">body</span>{<span style="color: #ff0000;">font-size</span>:<span style="color: #0000ff;"> 100%</span>;} <span style="color: #008080;">2</span> <span style="color: #800000;">h1</span>{<span style="color: #ff0000;">font-size</span>:<span style="color: #0000ff;"> 2.5em</span>;} <span style="color: #008080;">3</span> <span style="color: #800000;">h2</span>{<span style="color: #ff0000;">font-size</span>:<span style="color: #0000ff;"> 1.875em</span>;} <span style="color: #008080;">4</span> <span style="color: #800000;">p</span>{<span style="color: #ff0000;">font-size</span>:<span style="color: #0000ff;"> 0.875em</span>;}
3.font-style: normal/italic/oblique
当所用字体无斜体样式时,Safair使用默认字体,IE忽略该样式使用原字体。
4.font-weight:normal / bold
5.font-variant: normal / small-caps(小型大写字母)
简写: font:font-size, font-family [其他可选] / line-height
CSS3.0服务器端字体——@font-face——IE9及以上支持
<span style="color: #008080;">1</span> <span style="color: #800000;">@font-face</span>{ <span style="color: #008080;">2</span> <span style="color: #ff0000;"> font-family</span>:<span style="color: #0000ff;">WebFont</span>; <span style="color: #008080;">3</span> <span style="color: #ff0000;"> src</span>:<span style="color: #0000ff;"> url('Fontin_Sans_R_45b.otf') format("opentype")</span>;/*字体文件路径和字体文件格式*/ <span style="color: #008080;">4</span> <span style="color: #ff0000;"> font-weight</span>:<span style="color: #0000ff;"> normal</span>; <span style="color: #008080;">5</span> } <span style="color: #008080;">6</span> <span style="color: #800000;">h1</span>{ <span style="color: #008080;">7</span> <span style="color: #ff0000;"> font-family</span>:<span style="color: #0000ff;"> WebFont</span>; <span style="color: #008080;">8</span> }
<span style="color: #008080;">1</span> <span style="color: #800000;">@font-face</span>{ <span style="color: #008080;">2</span> <span style="color: #ff0000;"> font-family</span>:<span style="color: #0000ff;"> Helvetica</span>; <span style="color: #008080;">3</span> <span style="color: #ff0000;"> src</span>:<span style="color: #0000ff;"> local("Helvetica Neue") , url('服务器端字体')</span>; /*先搜索本地字体,再搜索服务器上的字体*/ <span style="color: #008080;">4</span> }

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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