Div as a Direct Child of UL: A Careful Approach
In HTML, it's commonly believed that only the
- element. However, some sources seem to suggest that
-
HTML 4: The content model for
- explicitly states that it can only contain
- elements:
<!ELEMENT UL - - (LI) + -- unordered list -- >
-
HTML 5: The content model for
- similarly specifies only
- elements:
Content model: Zero or more li elements.
Interpretation
The content model specifications clearly indicate that the only valid child of
- is
- . Therefore, according to the official HTML standards, using as a direct child of
- is incorrect.
- elements as direct children of
- . Using
or any other element as a child violates the HTML specifications and can have performance implications. By adhering to the standards, developers can ensure both the validity and optimal performance of their HTML code.The above is the detailed content of Can a `` Element Be a Direct Child of a `` Element in HTML?. For more information, please follow other related articles on the PHP Chinese website!
Browser Rendering Considerations
While some browsers may render
as a direct child of- without any apparent errors, this is not a reliable indicator of its validity. Browsers may often tolerate code that does not strictly adhere to the specifications, but this does not make it correct.
Performance Implications
Using
as a child of- can also have performance implications. Browsers internally process HTML elements according to the specified content models. When the content model is violated, the browser may need to perform additional work to handle the unexpected element, potentially slowing down the page's loading time.
Conclusion
In summary, the correct HTML structure for an unordered list is to use only
Statement of this WebsiteThe content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cnHot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Agnes Tachyon Build Guide | A Pretty Derby Musume2 weeks ago By Jack chenOguri Cap Build Guide | A Pretty Derby Musume3 weeks ago By Jack chenPeak: How To Revive Players1 months ago By DDDGrass Wonder Build Guide | Uma Musume Pretty Derby2 weeks ago By Jack chenPEAK How to Emote4 weeks ago By Jack chenHot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What is 'render-blocking CSS'? Jun 24, 2025 am 12:42 AM
CSS blocks page rendering because browsers view inline and external CSS as key resources by default, especially with imported stylesheets, header large amounts of inline CSS, and unoptimized media query styles. 1. Extract critical CSS and embed it into HTML; 2. Delay loading non-critical CSS through JavaScript; 3. Use media attributes to optimize loading such as print styles; 4. Compress and merge CSS to reduce requests. It is recommended to use tools to extract key CSS, combine rel="preload" asynchronous loading, and use media delayed loading reasonably to avoid excessive splitting and complex script control.
What is Autoprefixer and how does it work? Jul 02, 2025 am 01:15 AM
Autoprefixer is a tool that automatically adds vendor prefixes to CSS attributes based on the target browser scope. 1. It solves the problem of manually maintaining prefixes with errors; 2. Work through the PostCSS plug-in form, parse CSS, analyze attributes that need to be prefixed, and generate code according to configuration; 3. The usage steps include installing plug-ins, setting browserslist, and enabling them in the build process; 4. Notes include not manually adding prefixes, keeping configuration updates, prefixes not all attributes, and it is recommended to use them with the preprocessor.
What is the conic-gradient() function? Jul 01, 2025 am 01:16 AM
Theconic-gradient()functioninCSScreatescirculargradientsthatrotatecolorstopsaroundacentralpoint.1.Itisidealforpiecharts,progressindicators,colorwheels,anddecorativebackgrounds.2.Itworksbydefiningcolorstopsatspecificangles,optionallystartingfromadefin
CSS tutorial for creating a sticky header or footer Jul 02, 2025 am 01:04 AM
TocreatestickyheadersandfooterswithCSS,useposition:stickyforheaderswithtopvalueandz-index,ensuringparentcontainersdon’trestrictit.1.Forstickyheaders:setposition:sticky,top:0,z-index,andbackgroundcolor.2.Forstickyfooters,betteruseposition:fixedwithbot
What is the scope of a CSS Custom Property? Jun 25, 2025 am 12:16 AM
The scope of CSS custom properties depends on the context of their declaration, global variables are usually defined in :root, while local variables are defined within a specific selector for componentization and isolation of styles. For example, variables defined in the .card class are only available for elements that match the class and their children. Best practices include: 1. Use: root to define global variables such as topic color; 2. Define local variables inside the component to implement encapsulation; 3. Avoid repeatedly declaring the same variable; 4. Pay attention to the coverage problems that may be caused by selector specificity. Additionally, CSS variables are case sensitive and should be defined before use to avoid errors. If the variable is undefined or the reference fails, the fallback value or default value initial will be used. Debug can be done through the browser developer
What are fr units in CSS Grid? Jun 22, 2025 am 12:46 AM
ThefrunitinCSSGriddistributesavailablespaceproportionally.1.Itworksbydividingspacebasedonthesumoffrvalues,e.g.,1fr2frgivesone-thirdandtwo-thirds.2.Itenablesflexiblelayouts,avoidsmanualcalculations,andsupportsresponsivedesign.3.Commonusesincludeequal-
Can you nest a Flexbox container inside a CSS Grid item? Jun 22, 2025 am 12:40 AM
Yes, you can use Flexbox in CSSGrid items. The specific approach is to first divide the page structure with Grid and set the subcontainer into a Grid cell as a Flex container to achieve more fine alignment and arrangement; for example, nest a div with display:flex style in HTML; the benefits of doing this include hierarchical layout, easier responsive design, and more friendly component development; it is necessary to note that the display attribute only affects direct child elements, avoids excessive nesting, and considers the compatibility issues of old browsers.
CSS tutorial focusing on mobile-first design Jul 02, 2025 am 12:52 AM
Mobile-firstCSSdesignrequiressettingtheviewportmetatag,usingrelativeunits,stylingfromsmallscreensup,optimizingtypographyandtouchtargets.First,addtocontrolscaling.Second,use%,em,orreminsteadofpixelsforflexiblelayouts.Third,writebasestylesformobile,the
- elements as direct children of
- elements:
- elements:
HTML 4 and 5 Specifications
Let's examine the HTML 4 and 5 specifications to clarify this issue.