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  • HTML `option` `selected` Attribute for Default Selection
    HTML `option` `selected` Attribute for Default Selection
    To set the default selected in the HTML form, use the selected property. The specific method is to add the selected attribute to the target tag. The browser will automatically recognize and apply the status when it loads. For example, add selected in the "Banana" option, and the page displays Banana by default. Common uses include default values for the initial loading of the page, echoing data when editing by the user, and dynamic form preset options. Notes include: selected is a Boolean property without assignment; only the first one takes effect when multiple selected properties are selected; avoid mixing with selectedIndex or value of JavaScript. If you need to set it dynamically, you can modify sel through JS by default.
    HTML Tutorial . Web Front-end 226 2025-07-30 04:59:52
  • How to create an unordered list in HTML?
    How to create an unordered list in HTML?
    To create an HTML unordered list, you need to use a tag to define a list container. Each list item is wrapped with a tag, and the browser will automatically add bullets; 1. Create a list with a tag; 2. Each list item is defined with a tag; 3. The browser automatically generates default dot symbols; 4. Sublists can be implemented through nesting; 5. Use the list-style-type attribute of CSS to modify the symbol style, such as disc, circle, square, or none; use these tags correctly to generate a standard unordered list.
    HTML Tutorial . Web Front-end 846 2025-07-30 04:50:21
  • What is the hidden attribute?
    What is the hidden attribute?
    ThehiddenattributeinHTMLisusedtohideelementsthatarenotcurrentlyrelevant;1.Itvisuallyhidestheelementlikedisplay:noneinCSS;2.TheelementremainsintheDOMandcanbeaccessedviaJavaScript;3.Itistypicallyignoredbyscreenreaders,aidingaccessibility;4.Itisaboolean
    HTML Tutorial . Web Front-end 920 2025-07-30 04:49:41
  • How to structure a simple webpage layout with HTML5?
    How to structure a simple webpage layout with HTML5?
    StartwiththeHTML5doctypeandessentialmetatagsforcharacterencodingandresponsivedesign.2.Usesemanticelementslike,,,,,,andtostructurethepagemeaningfully.3.ApplyCSSGridforlayoutstylingandincluderesponsivemediaqueriestoensuremobilecompatibility,resultingin
    HTML Tutorial . Web Front-end 554 2025-07-30 04:44:32
  • How to add video to a webpage using the tag?
    How to add video to a webpage using the tag?
    Use tags to embed videos directly in web pages without third-party plug-ins; 2. It is recommended to use elements to provide various formats such as mp4, webm, ogg, etc. to ensure browser compatibility; 3. Add controls, muted, loop, preload, poster and other attributes to improve the playback experience; 4. Automatic playback needs to be matched with muted attributes to avoid being blocked by the browser; 5. Borders, rounded corners, shadows and responsive sizes can be set through CSS to optimize the video style; 6. Provide fallback text in the tag to prompt browsers that do not support video. Use these methods correctly to achieve native, compatible and beautiful web video embedding.
    HTML Tutorial . Web Front-end 435 2025-07-30 04:36:42
  • HTML `input` `list` Attribute and `datalist` ID
    HTML `input` `list` Attribute and `datalist` ID
    To use the list property of input to achieve the automatic completion function, you must first specify a value that is exactly the same as the id. The specific steps are as follows: 1. Set the list attribute in the element, with a value of a certain id (such as list="fruits"); 2. Define an id matching element in the page, which contains multiple options internally; 3. The browser will automatically match according to user input and display a list of suggestions. Note: the list attribute and id case are sensitive and must be unique; it supports mainstream browsers but the style is uncontrollable; users can still enter non-list content, and if you need to restrict it, you need to cooperate with JavaScript verification.
    HTML Tutorial . Web Front-end 743 2025-07-30 04:35:11
  • Deep Dive into HTML `template` Tag
    Deep Dive into HTML `template` Tag
    It is a lazy container used in HTML to store unrendered content. The browser will not parse its internal structure or load resources until it is explicitly inserted into the DOM through JavaScript. Its advantages include better performance, safer, and clearer semantics; the usage steps are: 1. Define the template content; 2. Get the template content (via .content); 3. Insert the page using document.importNode(); it is also widely used in modern frameworks such as Vue and is compatible with mainstream browsers.
    HTML Tutorial . Web Front-end 746 2025-07-30 04:25:11
  • Twitter Card Meta Tags for Social Media Integration
    Twitter Card Meta Tags for Social Media Integration
    The meta tag of TwitterCard is an important tool to improve the effect of links on Twitter. By adding specific tags to the web head, you can display images, titles, descriptions and other contents when sharing links. Common types include summary, summary_large_image, player and app; when setting, you need to add meta tags such as twitter:card, twitter:site, twitter:title, twitter:description, and twitter:image to HTML to ensure the accuracy of the content; when verifying, you need to use Twitter’s official CardVal.
    HTML Tutorial . Web Front-end 170 2025-07-30 04:11:37
  • What is the viewport meta tag for?
    What is the viewport meta tag for?
    Theviewportmetatagisessentialformobile-friendlydesignbecauseitensuresproperscalingandlayoutondifferentdevices;withoutit,websitesappeartoosmallonmobilescreens.Itworksbysettingthepagewidthtomatchthedevicescreenandcontrollinginitialzoom.Acommonimplement
    HTML Tutorial . Web Front-end 923 2025-07-30 04:05:52
  • What is the HTML element for?
    What is the HTML element for?
    Theelementprovidessuggestedvaluesforaninputfieldwhileallowingcustomentries.1.Itislinkedtoaninputusingtheinput'slistattributeandthedatalist'sid.2.Optionsaredefinedwithelementsinside.3.Userscanselectasuggestionortypeacustomvalue.4.Itenhancesuserexperie
    HTML Tutorial . Web Front-end 281 2025-07-30 04:05:13
  • How to create an ordered list in HTML?
    How to create an ordered list in HTML?
    To create an HTML ordered list, you need to use and tags, 1. Use a defined ordered list container; 2. Each list item is wrapped with a tag; 3. You can set a number type such as numerals, letters or Roman numerals through the type attribute; 4. Use the start attribute to specify the starting number; 5. You can implement a child list in nest, and the nested list should be placed in the parent to ensure the correct structure, and finally realize an automatically numbered ordered list and customize the style and starting value through the attribute.
    HTML Tutorial . Web Front-end 871 2025-07-30 04:03:32
  • The Core Concepts of HTML Markup
    The Core Concepts of HTML Markup
    Use semantic labels to improve structural clarity, use attributes to add extra information, pay attention to nesting and indentation for readability, and consider accessibility design from the beginning. First, use semantic tags such as , , and to clarify the roles of each part of the page; second, enhance the element function through class, id, href and data-* attributes; third, reasonably indent the nested structure to avoid confusion and errors; finally, always use meaningful link text and picture alt attributes to ensure barrier-free access.
    HTML Tutorial . Web Front-end 317 2025-07-30 04:03:13
  • HTML `button` `type='submit'` vs. `type='button'`
    HTML `button` `type='submit'` vs. `type='button'`
    type="submit" is used to submit a form, and clicking will trigger the default submission behavior; type="button" is a normal button, and JS operations need to be manually bound. 1. Type="submit" click in the form will automatically submit the data to the specified address. Even if the onclick event is bound, it will not block the default behavior unless event.preventDefault() is used. 2.type="button" does not submit forms, and is suitable for performing custom logic such as verification and dynamic operations. It is often used in front-end frameworks to avoid missed submissions. 3. Note: When type is not specified
    HTML Tutorial . Web Front-end 152 2025-07-30 03:46:22
  • How to create a password field?
    How to create a password field?
    The method of creating password fields varies from platform to platform: 1. The implementation of input mask is used in HTML, and verification can be enhanced through required, minlength and other attributes; 2. In React, useState to manage password status, the "Show Password" switching function can be added to improve user experience; 3. Android uses the EditText component of android:inputType="textPassword" in XML to avoid enabling text prediction to enhance security; 4. iOS uses SecureField to automatically hide input content in SwiftUI, prohibiting the recording of password logs; 5. PythonTkinter
    HTML Tutorial . Web Front-end 802 2025-07-30 03:34:52

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