转了一年还是转回前端了。今天开始认认真真仔仔细细的学习前端内容。首先就是html啦。
接触html比较晚,14年实习时候才真正接触了Java和html。现在学习的应该叫做html5了。整理一下今天所学的一些标签内容。
首先说一下DNS:全称Domain Name System,域名系统。是因特网上作为域名和IP地址相互映射的一个分布式数据库。
URL协议:规定URL地址的格式,URL地址就是网址。
规定格式:scheme://host.domain:port/path/filename
scheme--定义因特网服务的类型,最常见是http
host--定义域主机,默认主机是www
domain--定义因特网域名,如w3school.com.cn
port--定义主机端口号,默认端口号为80
path--定义服务器上的路径,如果省略,则文档必须位于网站的根目录下
filename--定义文档/资源的名称
页面标签:
块级标签:div、p、ul、ol、dl、li、dt、h1-h6
行级标签:span、strong、em等
1.:此标签是定义编码格式。浏览器默认编码格式是中文,如果不设置属性值为UTF-8,会出现乱码情况。还可以通过name和content属性进行网页描述,主要针对网站SEO。
2.标签:用法1:设置DNS预解析,如
用法2:引入图标 如
用法3:引入css样式 如
3.标签中,若值为"len"表示页面内容以英语为主,若值为"zh-cn",则表示页面内容以中文为主,此属性有利于搜索引擎或者爬虫对页面的扫描。
4.标签中,如何使一组radio只能同时选中一个值呢,就是将所有的radio标签中name属性值设为一样即可。
5.

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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