


XHTML introductory learning tutorial: XHTML common tags_HTML/Xhtml_web page production
Just like an article, our webpage also needs clear paragraphs and titles with different levels of importance. This section will introduce the commonly used tags in XHTML to implement functions such as titles and paragraphs.. Title tags
to
defines the title. We can use tags from to . Their corresponding termination tags are
to
respectively, where the font sizes from to decrease in order. The importance also gradually decreased. The browser will automatically add a blank line above and below the title.
Paragraph tag
defines the title. We can use tags from
to . Their corresponding termination tags are
to decrease in order. The importance also gradually decreased. The browser will automatically add a blank line above and below the title. Paragraph tag
Define paragraphs using
and
. The content betweenand
will be recognized as a paragraph, which is similar to what we usually call a "natural paragraph". Similar to headings, browsers add a line of whitespace before and after the beginning of a paragraph. Line break tag(
)
When we want to start another line of text but don’t want to start another natural paragraph, we can use the
tag. The
tag is also an empty tag and needs to be added with a "/" to comply with XHTML requirements. Horizontal dividing line tag
(
)
The tag that implements the horizontal dividing line is
. Like the
tag,
is also an empty tag. In order to comply with the rules of XHTML, a "/" needs to be added. (The following is a dividing line)
Comment
Proper use of the four tags introduced above can make users browsing your webpage feel that the hierarchy of the webpage is clear, and comments can make you feel that the hierarchy is clear when reading the source code of your webpage, so as not to be confused. Things between are the content of the annotation, and they will not be displayed on the web page. See how we insert comments in the exercise example below. Practice examples
Now open the web page we saved in the previous section and practice several important tags learned in this section. Remove "This is my first webpage." in and enter the following:
Service Announcement
I now provide the following services to primary school students and parents across the country:
Services for students
Ghostwriting for winter and summer vacation homework (there is no guarantee that there will be no wrong questions in mathematics, and there is no guarantee that there will be no typos in Chinese. For English homework, please find someone else)
If you help bully students below fourth grade, you will be charged extra for special cases.
Parents will help pretend to be parents.
VIP Service
Anyone who purchases all three services will be automatically upgraded to VIP. We will create a personal homepage for you for free, fully compliant with W3C's XHTML standard and ISO2009~.
Save the changes and browse the webpage to confirm that your webpage is the same as this page and you are done.

HTMLtagsdefinethestructureofawebpage,whileattributesaddfunctionalityanddetails.1)Tagslike,,andoutlinethecontent'splacement.2)Attributessuchassrc,class,andstyleenhancetagsbyspecifyingimagesources,styling,andmore,improvingfunctionalityandappearance.

The future of HTML will develop in a more semantic, functional and modular direction. 1) Semanticization will make the tag describe the content more clearly, improving SEO and barrier-free access. 2) Functionalization will introduce new elements and attributes to meet user needs. 3) Modularity will support component development and improve code reusability.

HTMLattributesarecrucialinwebdevelopmentforcontrollingbehavior,appearance,andfunctionality.Theyenhanceinteractivity,accessibility,andSEO.Forexample,thesrcattributeintagsimpactsSEO,whileonclickintagsaddsinteractivity.Touseattributeseffectively:1)Usese

The alt attribute is an important part of the tag in HTML and is used to provide alternative text for images. 1. When the image cannot be loaded, the text in the alt attribute will be displayed to improve the user experience. 2. Screen readers use the alt attribute to help visually impaired users understand the content of the picture. 3. Search engines index text in the alt attribute to improve the SEO ranking of web pages.

The roles of HTML, CSS and JavaScript in web development are: 1. HTML is used to build web page structure; 2. CSS is used to beautify the appearance of web pages; 3. JavaScript is used to achieve dynamic interaction. Through tags, styles and scripts, these three together build the core functions of modern web pages.

Setting the lang attributes of a tag is a key step in optimizing web accessibility and SEO. 1) Set the lang attribute in the tag, such as. 2) In multilingual content, set lang attributes for different language parts, such as. 3) Use language codes that comply with ISO639-1 standards, such as "en", "fr", "zh", etc. Correctly setting the lang attribute can improve the accessibility of web pages and search engine rankings.

HTMLattributesareessentialforenhancingwebelements'functionalityandappearance.Theyaddinformationtodefinebehavior,appearance,andinteraction,makingwebsitesinteractive,responsive,andvisuallyappealing.Attributeslikesrc,href,class,type,anddisabledtransform

TocreatealistinHTML,useforunorderedlistsandfororderedlists:1)Forunorderedlists,wrapitemsinanduseforeachitem,renderingasabulletedlist.2)Fororderedlists,useandfornumberedlists,customizablewiththetypeattributefordifferentnumberingstyles.


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