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  • Using HTML Global Attributes: `id`, `class`, `style`, `title`
    Using HTML Global Attributes: `id`, `class`, `style`, `title`
    The most commonly used global attributes in HTML include id, class, style, and title. ①Id is used to uniquely identify elements, often used in JavaScript operations or CSS style settings, and the naming should be semantic; ②class is used to define the same style or behavior for multiple elements, and supports the coexistence of multiple class names, suitable for style reuse; ③style is used for inline style control, suitable for simple or dynamic style settings, but is not recommended to overuse in large projects; ④Title is used to provide mouse hover prompts, suitable for assisting in explaining the functions of elements, but is not suitable for placing key content. Correct use of these properties can improve development efficiency and code maintainability.
    HTML Tutorial . Web Front-end 527 2025-07-19 02:54:11
  • HTML `popover` API for Overlay Content
    HTML `popover` API for Overlay Content
    Popover API is a lightweight popup layer implementation solution natively supported by the browser. When using it, you need to add popover attributes first and display and hide them in combination with JS control. 1. Add popover attributes to the target element to define the popup content; 2. Control the display status of the popup layer through showPopover() and hidePopover() methods; 3. Commonly used button clicks can also be triggered, but the compatibility is limited; 4. Avoid absolute/fixed positioning in style, and it is recommended to set background, border, shadow and z-index to ensure the level; 5. Currently, Chrome and Edge support are good, Firefox is in the experimental stage, and Safari is not supported yet
    HTML Tutorial . Web Front-end 184 2025-07-19 02:50:08
  • Implementing HTML `input` `placeholder` Text
    Implementing HTML `input` `placeholder` Text
    To add placeholder text, use the placeholder attribute in the input tag; the placeholder text should be concise and clear, and should not replace the tag or indicate required items; you can use CSS pseudo-elements to customize the placeholder style, but be careful of compatibility and accessibility. The specific steps are: 1. Add the placeholder attribute to the input tag to display the prompt text; 2. Write clear and short prompt content to avoid complete sentences or key information; 3. If you need to modify the style, you can adjust the color, font, etc. through the input::placeholder selector; 4. Pay attention to ensuring that the text is highly readable and avoid affecting the user experience.
    HTML Tutorial . Web Front-end 134 2025-07-19 02:41:42
  • HTML `textarea` `wrap` Attribute for Text Wrapping
    HTML `textarea` `wrap` Attribute for Text Wrapping
    ThewrapattributeinHTMLtextareacontrolstextwrappingandlinebreakhandling.Ithastwovalues:soft(default,wrapstextwithoutinsertingnewlines)andhard(insertsactualnewlinesbasedonthetextareawidth).Usewrap="hard"whenpreservingvisuallinebreaksisnecessa
    HTML Tutorial . Web Front-end 669 2025-07-19 02:41:01
  • Understanding HTML Fragment Identifiers
    Understanding HTML Fragment Identifiers
    FragmentIdentifier is the part after # in the URL, used to locate page locations or trigger behavior. Its core functions include: 1. Realize in-page jumps, such as directory navigation; 2. Apply a single page to switch views without refreshing the page; 3. Positioning of anchor points to facilitate content sharing; 4. Record status or parameters, such as playback time point. When using it, you need to note that the id is unique and case sensitive, and can be controlled by HTML element id or JavaScript. During development, we need to pay attention to SEO, link copying, compatibility and hashchange event processing to ensure stable functions and user experience.
    HTML Tutorial . Web Front-end 393 2025-07-19 02:40:42
  • HTML `base` Element for All Relative URLs
    HTML `base` Element for All Relative URLs
    Tags are used to uniformly control the reference addresses of all relative paths in HTML pages. It sets the basic path through the href attribute, affecting the parsing methods of resources such as links, pictures, scripts, and style sheets, and needs to be placed inside and there can only be one in the page. In addition, it can also set the target attribute to specify the default opening method of the link, but when using it, you need to pay attention to its impact on all relative paths, path stitching rules, possible local development problems, and potential SEO impact; common application scenarios include SPA, CDN resource deployment, multi-page shared path structure, and multi-language website switching paths.
    HTML Tutorial . Web Front-end 152 2025-07-19 02:35:42
  • Creating Accessible HTML Forms: A Complete Guide
    Creating Accessible HTML Forms: A Complete Guide
    Well-designed forms require attention to accessibility and ensure they are available to all users. 1. Use label label correctly to associate the input box to avoid relying solely on placeholder; 2. Ensure that the form can be operated through the keyboard, supports Tab, Enter and arrow keys, and use tabindex reasonably; 3. Provide clear error prompts, combine aria-live and text descriptions to avoid using only color marks; 4. Use appropriate input types and autocomplete attributes to optimize the input experience and improve barrier-free access capabilities.
    HTML Tutorial . Web Front-end 517 2025-07-19 02:28:32
  • Embedding Audio and Video with HTML5
    Embedding Audio and Video with HTML5
    Inserting audio and video into web pages can be implemented in HTML5 and tags. 1. Insert audio usage tags, you can specify the src path and add controls display controls; it can be compatible with multiple formats such as MP3 and OGG. 2. Use tags to embed videos, which also support multi-format adaptation of src, controls and tags, and can set properties such as autoplay, muted, loop, etc. 3. Notes include format compatibility (MP4's most general), performance impact (compression recommended), mobile restrictions (autoplay restriction), and preload control (preload attribute). Master these key points and you can successfully embed audio and video.
    HTML Tutorial . Web Front-end 682 2025-07-19 02:26:31
  • HTML `link rel='dns-prefetch'` Optimization
    HTML `link rel='dns-prefetch'` Optimization
    linkrel="dns-prefetch" is a lightweight front-end optimization method, suitable for scenarios where pages refer to multiple third-party resources or CDNs. When a web page uses external resources such as GoogleFonts, statistics scripts, alliance JS, or multiple CDN domain names, the DNS query time can be reduced by resolving the domain name in advance. The correct way to use it is to add: in HTML, but it should avoid abuse and be given priority to the domain names that must be loaded later. The difference between it and preconnect is that the latter also establishes TCP and TLS connections. The two can be used in combination, in the order of dns-prefetch first and then preconnect. Other points of attention include not being the main site
    HTML Tutorial . Web Front-end 150 2025-07-19 02:23:32
  • Shadow DOM and HTML Elements
    Shadow DOM and HTML Elements
    ShadowDOM is a technology that encapsulates HTML and CSS in an independent DOM subtree to achieve isolation of styles and structures. 1. It allows developers to create a "shadow tree" separated from the main document and attach it to ordinary HTML elements to ensure that internal content is not affected by external influences; 2. The creation method is to call the attachShadow() method through JavaScript, and the mode can be set to 'open' or 'closed'; 3. The main differences from ordinary HTML elements are style isolation, structure encapsulation and DOM query restrictions; 4. Common application scenarios include WebComponents development, UI component library encapsulation, and browser native component simulation. Master Shadow
    HTML Tutorial . Web Front-end 966 2025-07-19 02:21:02
  • The HTML `manifest` Attribute for Web App Manifests
    The HTML `manifest` Attribute for Web App Manifests
    The manifest property is an attribute in HTML that specifies the web application manifest file (manifest.json). Through it, it can realize the installation, offline access and other functions of web application. It is written on the label, such as:. When creating manifest.json, you need to include fields such as name, short_name, start_url, display, icons, theme_color, and background_color. To support installation functions, you also need to use HTTPS, provide 192x192 icons, and register ServiceWorker. Notes include correct paths, MIME type configuration, caching issues and compatibility.
    HTML Tutorial . Web Front-end 746 2025-07-19 02:20:42
  • HTML `del` Tag for Deleted Text
    HTML `del` Tag for Deleted Text
    The del tag is used to mark deleted text, which is commonly found in e-commerce price adjustments and document revisions. When using the text, wrap the text between the two, and the strikethrough is displayed by default; new content can be displayed with the Ins tag; datetime and cite attributes are supported to explain the deletion time and reason; styles such as color, strikethrough type, etc. can be customized through CSS. For example: Original price: 199 yuan now only 99 yuan! Or combine Ins to achieve content comparison: old content and new content.
    HTML Tutorial . Web Front-end 355 2025-07-19 02:19:02
  • HTML `figcaption` Best Practices
    HTML `figcaption` Best Practices
    figcaption is used in HTML to add instructions to multimedia content. It must be nested in the figure tag and cannot be used alone. Its function is to provide image notation information, rather than repeating alt text. It can be used in various media types such as pictures, videos, code blocks, etc.; styles should be controlled through CSS to maintain visual coordination. Correct use of figcaption can improve the accessibility and semantic structure of the page. 1. Must be wrapped in the figure and placed reasonably 2. Should be used as a supplementary description rather than alternative text 3. Supports multiple media types and not limited to pictures 4. Appropriate control of styles is required to avoid abuse or neglect of design.
    HTML Tutorial . Web Front-end 492 2025-07-19 02:04:42
  • The `optgroup` Tag in HTML `select`
    The `optgroup` Tag in HTML `select`
    In HTML forms, use tags to group options from the drop-down menu to improve readability and user experience. 1. It is a label under the element, used to group multiple groups and define group names through label attributes; 2. When using it, it needs to be placed inside and nested, and each must have a label attribute; 3. Notes include not being nested, the entire group options can be disabled through the disabled attribute, the CSS custom style can be used, and the need to consider accessibility support; 4. Applicable scenarios include multi-classified data selection, and the need to have visual hierarchy or logical hierarchy relationships. Rational use can effectively improve the interactive experience of the form.
    HTML Tutorial . Web Front-end 150 2025-07-19 02:01:33

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