知识点:
1.在页面上对齐文本的方法
2.三种HTML列表的使用方法
3.在列表中放置列表的方法
5.1 在页面上对齐文本:
父元素内子元素文本的居中:在控制父元素的text-align:center
子元素相对于父元素的居中:在控制子元素的margin:0 auto;
PS:div指的是division(分组)。
5.2 三种HTML列表:
- ...
- :有序列表,整列表有缩进,每个列表项前有数字或者字母
- ...
- :无序列表,与有序列表不一样的是列表项前是符号
- ...
- ...
- :自定义列表,dt对应每项标题,然后dd对应每项内容
5.3 将列表放到列表中:
blockquote的效果(浏览器已定义好的):
1 blockquote {2 display: block;3 -webkit-margin-before: 1em;4 -webkit-margin-after: 1em;5 -webkit-margin-start: 40px;6 -webkit-margin-end: 40px;7 }
列表之间是可以无限嵌套的……
- :无序列表,与有序列表不一样的是列表项前是符号

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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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