The Meta tag can be divided into two parts, HTTP header information (HTTP-EQUIV) and page description information (NAME). The following table describes the HTTP header information.
Table 1 HTTP header information (HTTP-EQUIV) table
content-type | 显示字符集 | |
refresh | 让页面指定时间刷新自己,或者跳转 | |
expires | 指定网页缓存的过期时间 | |
cach | 是否允许浏览器从本地机器调阅缓存 | |
set-cookie | 是否禁用cookie或者使cookie失效 | |
window-target | 强制页面的显示方式 | 强制页面在当前窗口中以独立页面显示,也可以用来防止别人在框架里调用该页面。其中content的选项为_blank,_top,_self,_parent。 |
page-enter,page-exit | 页面的进入与退出的特效设置 | 这实际上是利用到了CSS滤镜。 |
Meta’s page description information (NAME) is used to illustrate and describe the web page. Name describes the web page and corresponds to the content, so that search robots can find and classify it. The value of name (name="") specifies the type of information provided, some of which are
Values are already defined, such as description, keyword, refresh, etc. You can also specify other arbitrary values, such as creationdate, documentID, Level, etc. The following table is the specific syntax:
Table 2 HTTP description information table
keywords | 声明网页的关键字,又搜索引擎自动完成关键字索引。 | |
Description | 描述网站的主要内容,搜索殷勤也会通过这个属性来检索这个网站,但是不显示出来。 | |
Robots | 机器人向导,用来告诉机器人那些页面需要索引,那些不需要索引。 |
all:文件将被索引。None文件不被索引,且页面上的链接不可以被查询。(和"NoIndex,NoFollow"起相同作用).Index:文件将被检索。Follow:页面上的链接可以被查询。 |
Author | 页面作者 | |
Copyright | 用于标注版权 | |
Generator | 编辑器 | |
revisit-after | 设定重新访问的时间间隔,以天为单位。(我还不是很清楚该标签作用) | |
Meta also has some other tags, which are also organized in a unified manner, see the table below:
Table 3 Meta other tag table
scheme | 说明内容的一个含义标签 | |
link | 链接到某个文件 | 放入收藏夹中后显示的小图标,地址栏上的小图标 |
base | 基链接 |
|

HTML is a language used to build web pages, defining web page structure and content through tags and attributes. 1) HTML organizes document structure through tags, such as,. 2) The browser parses HTML to build the DOM and renders the web page. 3) New features of HTML5, such as, enhance multimedia functions. 4) Common errors include unclosed labels and unquoted attribute values. 5) Optimization suggestions include using semantic tags and reducing file size.

WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.

The role of HTML is to define the structure and content of a web page through tags and attributes. 1. HTML organizes content through tags such as , making it easy to read and understand. 2. Use semantic tags such as, etc. to enhance accessibility and SEO. 3. Optimizing HTML code can improve web page loading speed and user experience.

HTMLisaspecifictypeofcodefocusedonstructuringwebcontent,while"code"broadlyincludeslanguageslikeJavaScriptandPythonforfunctionality.1)HTMLdefineswebpagestructureusingtags.2)"Code"encompassesawiderrangeoflanguagesforlogicandinteract

HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.

HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.

HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.

AnexampleofastartingtaginHTMLis,whichbeginsaparagraph.StartingtagsareessentialinHTMLastheyinitiateelements,definetheirtypes,andarecrucialforstructuringwebpagesandconstructingtheDOM.


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