块级元素:div, p(段落), form(表单), ul(无序列表), li(列表项), ol(有序列表), dl(定义列表), hr(水平分割线), menu(菜单列表), table(表格)...
特点:1、块级元素会独占一行,其宽度自动填满其父元素宽度。
2、可以设置width,height属性。(即使设置了宽度,也是独占一行的,除非用float属性等特殊情况)
3、可以设置margin(外边距)和padding(内边距)。
行内元素:span, strong, em, br, img, input, label, select, testarea...
(行内元素、内联元素、内嵌元素、直进式元素都是指 "inline element")
特点:1、行内元素不会独占一行,相邻的行内元素会排列在同一行里,直到一行排不下,才会换行,其宽度随元素的内容而变化(其宽度由内容撑开)。
2、设置width,height属性无效。
3、水平方向上的padding-left,padding-right,margin-left,margin-right产生边距效果,
但竖直方向的padding-top,padding-bottom,margin-top,margin-bottom不会产生效果。
可变元素:需要根据上下文关系确定该元素是块级元素还是行内元素。属于上述两种元素类别,一旦上下文关系确定了他的类别,他就遵循块级元素或行内元素的规则限制。
CSS:css能够改变html的默认布局模式,把块级元素摆放到你想要的位置上去。
块级元素和行内元素的基本差异是块元素一般从新行开始,而当加入了css控制之后,这种属性差异就不成为差异了。
给行内元素加上 display:block 这样的属性,让行内元素也有每次都从新行开始的属性。
给块级元素加上 display:inline 这样的属性,让块级元素不具有从新行开始的属性。
给行内元素加上 display:inline-block 属性,仍为行内元素,但是可以设置width及height属性等。
(该文仅供学习交流。如有不同观点,欢迎留下宝贵意见~)

The function of HTML is to define the structure and content of a web page, and its purpose is to provide a standardized way to display information. 1) HTML organizes various parts of the web page through tags and attributes, such as titles and paragraphs. 2) It supports the separation of content and performance and improves maintenance efficiency. 3) HTML is extensible, allowing custom tags to enhance SEO.

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The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.

The future of HTML is full of infinite possibilities. 1) New features and standards will include more semantic tags and the popularity of WebComponents. 2) The web design trend will continue to develop towards responsive and accessible design. 3) Performance optimization will improve the user experience through responsive image loading and lazy loading technologies.

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HTMLisnotaprogramminglanguage;itisamarkuplanguage.1)HTMLstructuresandformatswebcontentusingtags.2)ItworkswithCSSforstylingandJavaScriptforinteractivity,enhancingwebdevelopment.

HTML is the cornerstone of building web page structure. 1. HTML defines the content structure and semantics, and uses, etc. tags. 2. Provide semantic markers, such as, etc., to improve SEO effect. 3. To realize user interaction through tags, pay attention to form verification. 4. Use advanced elements such as, combined with JavaScript to achieve dynamic effects. 5. Common errors include unclosed labels and unquoted attribute values, and verification tools are required. 6. Optimization strategies include reducing HTTP requests, compressing HTML, using semantic tags, etc.

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.


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