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  • HTML Accessibility Tree and How Browsers Interpret HTML
    HTML Accessibility Tree and How Browsers Interpret HTML
    AccessibilityTree is a structure built by the browser based on the semantic tags and ARIA attributes of HTML, used to assist technology in understanding page content. 1. It is a subset of the DOM tree, not directly copying the DOM; 2. The browser gives accessible roles by identifying semantic tags (such as buttons and inputs); 3. Processing ARIA attributes (such as aria-label, role) to enhance accessibility; 4. Ignore semantic elements (such as divs and spans without attributes); 5. You can use browser developer tools to view their performance. To build a friendly AccessibilityTree, semantic tags should be used first, ARIA attributes should be added reasonably, and attention should be paid to hiding the inside
    HTML Tutorial . Web Front-end 876 2025-07-21 01:58:52
  • Lazy Loading Images in HTML for Performance
    Lazy Loading Images in HTML for Performance
    Lazy image loading is a technology that delays loading non-first-screen image resources. By loading images only when the user scrolls to the relevant area, it improves page loading speed and user experience. Its core implementation is to use the loading="lazy" attribute of HTML. Modern browsers natively support this function without relying on JavaScript plug-ins. 1. Lazy loading is suitable for long pages, galleries or social media pages, hidden pictures in responsive designs, etc.; 2. Pay attention to adding alt attributes when using them to ensure SEO and accessibility; 3. Placeholders or fixed heights should be set through CSS to avoid layout jitter; 4. Reasonable control of the loading order to ensure that core images are loaded first; 5. It should be different
    HTML Tutorial . Web Front-end 525 2025-07-21 01:56:42
  • HTML `ping` Attribute for Hyperlinks
    HTML `ping` Attribute for Hyperlinks
    The ping attribute is a function of tags in HTML that is used to send asynchronous POST requests to the specified URL when a user clicks a link. Its main function is to track the click behavior of external links without affecting the user experience. It is often used to count the number of visits to ads or recommended links. When using it, just add the ping attribute in the link tag and specify one or more target URLs, such as VisitExample. Applicable scenarios include content aggregation platform, advertising system, blog recommendation links, etc. Recommendations for use include ensuring that the server responds correctly (such as returning a 204 status code), specifying multiple URLs, paying attention to cross-domain restrictions, and not relying on ping as the only statistical method. Limitations include different browser support and privacy settings that may block
    HTML Tutorial . Web Front-end 145 2025-07-21 01:51:03
  • Structuring Content with HTML `section` and `article`
    Structuring Content with HTML `section` and `article`
    section is used to divide independent blocks with titles, suitable for logically divided content areas; articles are used for independent blocks of content, such as blog posts or comments; they can be used in nested ways, but attention should be paid to the title and semantic correctness. When using it, semantics rather than styles should be given priority, and ARIA attributes should be reasonably matched to improve accessibility.
    HTML Tutorial . Web Front-end 763 2025-07-21 01:50:31
  • The HTML `caption` Tag for Table Titles
    The HTML `caption` Tag for Table Titles
    TheHTMLcaptiontagprovidesacleartitleorsummaryfortables,improvingreadabilityandaccessibility.Itisplacedinsidetheelementandtypicallyappearsatthetop,thoughitspositioncanbeadjustedwithCSS.Itisespeciallyusefulfordata-heavycontentlikefinancialreportsorcomp
    HTML Tutorial . Web Front-end 272 2025-07-21 01:43:41
  • HTML `ping` and its implications for user privacy
    HTML `ping` and its implications for user privacy
    Yes,theHTMLpingattributecanposeprivacyrisks.Itallowswebsitestosilentlynotifythird-partyURLswhenauserclicksalink,enablingtrackingwithoutclearconsent.1.PingsendsbackgroundPOSTrequeststospecifiedURLsuponlinkclicks.2.Itenablessilenttrackingwithnousernoti
    HTML Tutorial . Web Front-end 136 2025-07-21 01:39:02
  • Adding Comments in HTML: Syntax and Usage
    Adding Comments in HTML: Syntax and Usage
    HTML comments are written in the form of use, and their functions include explaining the purpose of the code, separating the module structure, facilitating debugging and improving collaboration efficiency. 1. Commonly used for module division, such as marking headers, navigation bars, content areas, etc.; 2. You can temporarily comment code blocks for debugging; 3. Explain complex structures to improve readability. Be careful not to nest comments, avoid meaningless comments, and keep them neat.
    HTML Tutorial . Web Front-end 780 2025-07-21 01:38:21
  • Optimizing HTML for Faster Page Load Times
    Optimizing HTML for Faster Page Load Times
    The loading speed of web pages can be improved by optimizing HTML. Specific methods include: 1. Reduce the HTML file size, delete redundant code, spaces and comments, simplify tag attributes and use HTML compression tools; 2. Correctly use semantic tags such as, ,, to avoid abuse and deep nested structures; 3. Delay loading non-critical content, such as the image using the loading="lazy" attribute, non-top-screen content is loaded in or dynamically inserted, and third-party scripts are placed at the bottom or asynchronously; 4. Reduce redirection and external requests, merge CSS and JS files, inline key CSS, and avoid unnecessary external fonts and scripts. These methods are detailed but practical and can significantly improve performance.
    HTML Tutorial . Web Front-end 991 2025-07-21 01:24:12
  • Variables with HTML `var`
    Variables with HTML `var`
    Labels are used to represent variables, commonly found in mathematical formulas, programming instructions, and user input examples. 1. The variables in mathematical formulas such as x and r apply marks; 2. It can also be used when describing the function of variables in programming, such as loop variable i; 3. The placeholder in the user input example, such as the user name, is also suitable for use. It is different from, and emphasizes semantics rather than styles. Abuse should be avoided during use and structured to improve the professionalism and accessibility of the web page.
    HTML Tutorial . Web Front-end 476 2025-07-21 01:21:42
  • HTML Structure for E-commerce Websites
    HTML Structure for E-commerce Websites
    E-commerce websites need clear HTML structure to improve SEO, user experience and code maintenance efficiency. 1. The basic page structure should include,,,,, and organize content using semantic tags such as,,,,, etc.; 2. Product details pages should pay attention to information hierarchy and accessibility, use heading tags (such as product names and specifications), and use and display pictures; 3. List pages and classification pages are recommended to use/wrap product items, embedded or as containers, titles and prices, and enhance pagination accessibility, while ensuring the responsive structure is friendly to search engines.
    HTML Tutorial . Web Front-end 298 2025-07-21 01:21:22
  • HTML `link` for Preloading Critical Resources
    HTML `link` for Preloading Critical Resources
    Preloading key resources can optimize web page performance and load key resources on the first screen in advance. Rel="preload" should be used to preload resources that are crucial for first-screen rendering, such as key CSS, JS, fonts, first-screen pictures, etc.; correctly set the as attribute to match resource types such as as="style", as="script", as="font", etc., and it is recommended to add type attributes to ensure format compatibility; when preloading fonts, you must add crossorigin attributes to ensure correct loading and cache; avoid abuse of preloading, use only for critical resources, and prevent affecting other request priorities.
    HTML Tutorial . Web Front-end 943 2025-07-21 01:12:41
  • Using HTML `address` for Contact Information
    Using HTML `address` for Contact Information
    Using HTML tags to display contact information is a practical but often overlooked approach. 1. It is a semantic tag, designed for package contact information, which can include address, phone number, email address, etc.; 2. It improves accessibility, and the screen reader can recognize and prompt the user to be contact information; 3. It is conducive to SEO, and search engines can extract information for local search results; 4. Make the code structure clearer, which facilitates maintenance and collaboration; 5. When using it, it is necessary to note that it is a block-level element, and the default style may need to be adjusted to avoid nesting multiple or putting non-contact information content. Correct usage is such as combining links to display emails and phone calls, which can enhance user experience and website quality concisely and clearly.
    HTML Tutorial . Web Front-end 1001 2025-07-21 01:05:17
  • The HTML `keygen` Tag (Deprecated: Modern Alternatives)
    The HTML `keygen` Tag (Deprecated: Modern Alternatives)
    The keygen tag was used to generate key pairs and assist in client certificate creation, but has been deprecated. 1. It is a form element in HTML5, used to generate public and private keys when submitting, the public key submits the server, and the private key is retained on the client; 2. The reasons for deprecation include poor compatibility, limitations in functionality, WebCryptoAPI substitution and standardization problems; 3. Modern alternatives include using WebCryptoAPI, JavaScript encryption libraries, or backend to process encryption logic; 4. Currently, it may only be seen in legacy systems, old tutorials, or specific enterprise environments.
    HTML Tutorial . Web Front-end 1020 2025-07-21 00:55:42
  • Implementing HTML `main` Element for Primary Content
    Implementing HTML `main` Element for Primary Content
    Tags are semantic tags in HTML that wrap the core content of the page, which can improve SEO and accessibility. 1. It can only be used once per page; 2. It should directly serve the current page theme; 3. It can nest other semantic tags such as, etc.; 4. It helps auxiliary tools to quickly locate the main content; 5. It should not be included in,,, etc. layout tags. Rational use can enhance the clarity of web page structure and user experience.
    HTML Tutorial . Web Front-end 496 2025-07-21 00:16:42

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