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  • Understanding HTML `rel` Attributes in Links
    Understanding HTML `rel` Attributes in Links
    The rel attribute is an important attribute of tags in HTML. It is used to define the relationship between the current page and the linked target page and affect the behavior of the browser and search engines. Common rel values include nofollow, noopener, noreferrer, external, etc. The specific use is as follows: 1.rel="nofollow" is suitable for ads or user-submitted links, preventing search engines from tracking and avoiding spam links affecting the weight of the website; 2.rel="noopener" is used to improve security and prevent new pages from controlling the original page through window.opener; 3.rel="noref
    HTML Tutorial . Web Front-end 720 2025-07-20 03:23:32
  • Implementing HTML `itemprop`, `itemscope`, `itemtype` for Schema.org
    Implementing HTML `itemprop`, `itemscope`, `itemtype` for Schema.org
    itemscope, itemtype, and itemprop are microdata properties used in HTML to add structured data. itemscope represents the beginning of an independent project. Itemtype defines the type of the project (such as articles, products, etc.), and itemprop is used to mark the specific attributes of the project (such as title, price, etc.). When using correctly nested, the outer element uses item scope and item type to define the main object, and the inner element points to the attributes of the object through itemprop, and can directly use item scope and item type to define sub-objects on the nested element when needed. For example, when an event contains organizer information, the organizer can act as a nest
    HTML Tutorial . Web Front-end 868 2025-07-20 03:02:11
  • Custom Elements in HTML: A Deep Dive
    Custom Elements in HTML: A Deep Dive
    CustomElementsinHTMLallowdeveloperstocreatereusable,customtagsthatextendstandardHTMLelements.TheyarepartofWebComponentsandenablemodular,maintainablecode.Therearetwotypes:autonomouscustomelements(e.g.,)andcustomizedbuilt-inelements(e.g.,).Developersde
    HTML Tutorial . Web Front-end 428 2025-07-20 03:01:14
  • HTML `seamless` Attribute for Iframes (Deprecated)
    HTML `seamless` Attribute for Iframes (Deprecated)
    The reason why the seamless attribute is deprecated is its vague function and insufficient control. It is manifested as: 1. Seamless is automatically processed by the browser, and developers cannot accurately control details; 2. With the development of front-end technology, CSS and JavaScript can achieve similar effects more flexibly and reliably, such as removing borders through border:none and dynamically adjusting height through JS; 3. Although mainstream browsers still support it, they are no longer recommended, and old projects should be replaced as soon as possible. Therefore, it is recommended to use CSS JS instead of seamless for improved compatibility and maintainability.
    HTML Tutorial . Web Front-end 352 2025-07-20 02:54:42
  • Mastering HTML Form Security
    Mastering HTML Form Security
    Three core steps are required to handle HTML form security issues: 1. Verify input from the backend to prevent attackers from bypassing the front-end restrictions on uploading malicious content or sending illegal data; 2. Use CSRFToken to prevent cross-site request forgery, ensuring that each request carries a unique and unpredictable token; 3. Encrypt and store sensitive data and clean and escape user input to prevent XSS attacks and information leakage. These measures can effectively ensure the security of forms and reduce the risk of being attacked.
    HTML Tutorial . Web Front-end 634 2025-07-20 02:51:42
  • Semantic HTML: Why It Matters for SEO and Accessibility
    Semantic HTML: Why It Matters for SEO and Accessibility
    Yes, semantic HTML is crucial for SEO and accessibility. 1. Semantic tags such as help search engines better understand page structure and improve index accuracy and ranking; 2. Semantic enhance accessibility, so that screen reader users can efficiently navigate and interact with elements correctly; 3. Use the correct title hierarchy and form tags to avoid damaging document outlines or operational obstacles; 4. Semantic code improves team collaboration and long-term maintenance efficiency; 5. Implementation does not require complex changes, and maintains consistency to gradually optimize, laying a solid foundation for SEO and accessibility.
    HTML Tutorial . Web Front-end 122 2025-07-20 02:47:13
  • HTML `bdo` Tag for Bidirectional Override
    HTML `bdo` Tag for Bidirectional Override
    Tags are used to force the text display direction to solve the orientation problem in multilingual mixed typesetting. It is an inline element that specifies the text direction through the dir attribute, 1. Supports dir="ltr" display from left to right, 2. Supports dir="rtl" display from right to left. It is suitable for three main scenarios: 3. The problem of confusing text order during mixed language typesetting, 4. Unified or special control of text direction in international websites, 5. Debug the browser's default direction processing mechanism. The use method is simple, such as Thisisatest will force English to be displayed from right to left. Notes include: 6. Only change the display direction and not change the language itself, 7. This label should not be abused, 8. Its semantics
    HTML Tutorial . Web Front-end 599 2025-07-20 02:44:12
  • Structuring HTML for Mobile-First Design
    Structuring HTML for Mobile-First Design
    Mobile-first web design should start with HTML structure to improve performance, maintainability and user experience. 1. Use HTML5 semantic tags such as, ,,,, and organize content to improve SEO and accessibility; 2. Set the viewport to ensure correct rendering on the mobile side, and keep the structure flat and reduce nesting; 3. Use srcset and sizes attributes to achieve responsive loading, and set the video width: 100% adaptive layout; 4. Use bind input items in the form and use HTML5 input types such as email and tel to optimize the mobile input experience. A reasonable HTML structure lays a solid foundation for subsequent styles and interactive development.
    HTML Tutorial . Web Front-end 284 2025-07-20 02:40:44
  • The HTML `dialog` Element for Pop-up Boxes
    The HTML `dialog` Element for Pop-up Boxes
    How to use HTML dialog elements to implement pop-up function? 1. Use tags to define the pop-up structure, and control the display through JavaScript's showModal() or show() method; 2. Set width, shadow, mask layer and other styles to beautify the pop-up windows; 3. Add interactive optimizations such as clicking on the mask to close, ESC key to close, and preventing page scrolling. The method is well-structured and does not require additional library support, and is suitable for most scenarios.
    HTML Tutorial . Web Front-end 375 2025-07-20 02:36:13
  • Creating Ordered and Unordered Lists in HTML
    Creating Ordered and Unordered Lists in HTML
    There are two types of HTML lists in web development: ordered lists and unordered lists. 1. Use tags for unordered lists, suitable for content that does not emphasize order, such as shopping lists; 2. Use tags for orderly lists, suitable for content that has order or priority, such as step instructions; 3. List items are all represented; 4. The style or type attribute can be adjusted through CSS to change the numbering type; 5. Support nested lists to enhance structural clarity, but the level should not be too deep. Mastering these can improve page readability and semantic structure and facilitate SEO and barrier-free access.
    HTML Tutorial . Web Front-end 631 2025-07-20 02:35:31
  • HTML `iframe` Tag: Embedding External Content Securely
    HTML `iframe` Tag: Embedding External Content Securely
    Pay attention to security and performance when using iframes. Key tips include: 1. Use allow attributes to limit permissions, such as allowing full screen, cameras, etc.; 2. Prevent click hijacking attacks through X-Frame-Options or CSP; 3. Use sandbox attributes to enhance isolation, and prohibit scripts and form submissions by default; 4. Pay attention to loading performance, delay loading or adopt preview mode to reduce resource consumption and protect privacy.
    HTML Tutorial . Web Front-end 704 2025-07-20 02:34:32
  • Scalable Vector Graphics (SVG) in HTML
    Scalable Vector Graphics (SVG) in HTML
    To use SVG in HTML and give full play to its advantages, you need to pay attention to the following points: 1. The embedding method is divided into inline and external reference. Inline is suitable for interactive scenes, and external reference is suitable for static graphics; 2. SVG is often used for icons, data visualization and animation, with lossless scaling and programmability; 3. In terms of optimization, metadata needs to be removed, complexity is controlled, and appropriate size is set; 4. SVG can control styles through CSS, but pay attention to the differences in the use of attributes such as fill and stroke. Mastering these core content can more efficiently apply SVG on web pages.
    HTML Tutorial . Web Front-end 712 2025-07-20 02:26:52
  • HTML `em` vs `i` Tag for Emphasis
    HTML `em` vs `i` Tag for Emphasis
    Whether to choose or not depends on whether semantic emphasis is needed. 1. Used to emphasize the tone of the content, suitable for scenes where the focus is conveyed or the stress is reflected in accessible access; 2. Used only for visual italics, such as scientific languages, foreign language vocabulary or book names, without semantic emphasis requirements; 3. If it is only for style control, it is recommended to use CSS instead of mixed labels.
    HTML Tutorial . Web Front-end 711 2025-07-20 02:25:52
  • Structuring Content with HTML `header` and `footer`
    Structuring Content with HTML `header` and `footer`
    Header and footer are semantic tags used in HTML to define the header and bottom of a page, which can improve structural clarity, accessibility and SEO. 1. The header is usually located at the top of the page, including title, navigation bar, etc. It is recommended that each page only uses one main header; 2. Footer is often used to place copyright information, secondary links, etc. It is recommended that each page has at least one main footer, and the content should be concise and clear; 3. Used in combination with semantic tags such as main and section, it can further enhance the page structure and semantic expression.
    HTML Tutorial . Web Front-end 576 2025-07-20 02:09:11

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