


Summary of XHTML application in web design learning_HTML/Xhtml_Web page production
Generally speaking, the file organization of "standard web pages" is XHTML CSS. XHTML is mainly used to represent web page structure and display content, while CSS is used to define structural layout and modify content styles.
XHTML commonly used for layout generally includes:
DIV: Mainly used for logical division of page content. For example, a web page generally includes responsible partitions such as header, navigation, sidebar, content and copyright. At this point you can use the DIV tag to split.
At the same time, it is recommended to name each block like this:
The following is the quoted content:
Header:
Navigation:
Sidebar:
Content:
Copyright:
Note: The ID is unique, that is, the ID must not appear more than twice on the same page. Otherwise use class.
ul: It is originally an unordered list and is often used to represent equivalent elements of non-structural classes in XHTML CSS applications. Need to be used in conjunction with the sub-element LI of UL.
The following is the quoted content:
span: If you compare this element with DIV, then span is a bag and div is a box (Xiao Yi: Basic Application of XHTML Code). In fact, div is a block-level element, and span is an inline element (see related inline (inline) elements and block-level elements). Through span, you can individually define a segment element in a paragraph or a row of elements.
For example:
The following is the quoted content:
- (2006-11-13)Summary of XHTML application of XHML CSS layout
Defining span in css as left/right floating allows the date and title to be displayed on both sides. This is relative to using
The following is the quoted content:
- 2007-11-5jb51.net
- XHML CSS layout summary
Much simpler.
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After talking about the common XHTML tags used for layout, there are also XHTML tags used to display web page content. for example:
The following is the quoted content:
represents a hyperlink
It is recommended that h1-h6 decrease in order of importance, h1 is the most important title (see greengnn: div css naming reference)
Originally used and to represent bold and italic tags, choose to use and instead.

Boolean attributes are special attributes in HTML that are activated without a value. 1. The Boolean attribute controls the behavior of the element by whether it exists or not, such as disabled disable the input box. 2.Their working principle is to change element behavior according to the existence of attributes when the browser parses. 3. The basic usage is to directly add attributes, and the advanced usage can be dynamically controlled through JavaScript. 4. Common mistakes are mistakenly thinking that values need to be set, and the correct writing method should be concise. 5. The best practice is to keep the code concise and use Boolean properties reasonably to optimize web page performance and user experience.

HTML code can be cleaner with online validators, integrated tools and automated processes. 1) Use W3CMarkupValidationService to verify HTML code online. 2) Install and configure HTMLHint extension in VisualStudioCode for real-time verification. 3) Use HTMLTidy to automatically verify and clean HTML files in the construction process.

HTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.

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.


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