Semantic understanding in Html

Semanticization refers to making the code more semantic and readable by properly selecting tags and attributes when writing HTML and CSS codes, and making the page structure and content clearer. The purpose of semantics is to make the page have good accessibility, maintainability and scalability.

The importance of semantics is reflected in the following aspects:

1. Accessibility (Accessibility) : By using appropriate tags and attributes, the accessibility of the page can be improved, enabling assistive technologies (such as screen readers) to better understand and parse the content of the page, enabling disabled users to browse and use normally Web page.
2. Search Engine Optimization (SEO) : Search engines prefer page content that can be understood and parsed, and a semantic HTML structure can improve the ranking of the page in search engine results, increasing the exposure and traffic of the page.
3. Code readability and maintainability : Using semantic tags and attributes can make the code easier to read and understand, and improve the maintainability of the code. Developers can more quickly locate and modify specific features or content.
4. Device compatibility : Different devices and platforms have different rendering and parsing methods for web pages. Semantic codes can increase the compatibility of web pages on various devices and ensure the correct display and use of pages in different environments.

The specific performance and practice of semantics in front-end development include the following aspects:

1. Choose the right HTML tags : When building the page structure, choose the right HTML tags to describe the meaning of the content. For example, use it<header>to represent a page header,<nav>to represent a navigation bar,<article>to represent individual article content, etc.
2. Use meaningful tags and attributes : Avoid abusing<div>tags and instead choose more semantic tags to express the meaning of the content. At the same time, use the attributes of tags reasonably, such asaltattributes for alternative text of images,titleattributes for providing additional information, etc.
3. Structure and Hierarchy : Build clear page structures and hierarchies by properly nesting and organizing HTML elements. Use the semantic parent-child relationship to make the hierarchical relationship of the content clearer and facilitate the writing and maintenance of styles and scripts.
4. Text formatting : use appropriate tags and attributes to mark the format and semantics of text. For example, use<strong>tags for important text,<em>tags for emphasized text,<blockquote>tags for quoted text, etc.
5. Accessibility support : Taking into account the needs of users with disabilities, the use of semantic tags and attributes can improve the accessibility of the page. For example, adding appropriate header and description information to the table, associating labels with form elements, etc.
6. Semanticization of CSS selectors : When writing CSS styles, try to use semantic class names and IDs, and avoid relying too much on element label selectors to enhance the readability and maintainability of styles.

Summarize

• Do the right thing with the right label!
• HTMLSemanticization is to make the content of the page structured so that it can be easily parsed by browsers and search engines;
• Displays in a document format without styling CSSand is easy to read.
• Search engine crawlers rely on markup to determine the context and weight of individual keywords, which is beneficial  SEO.
• Make it easier for people who read the source code to divide the website into blocks, which is easy to read, maintain and understand