- 圆角,border-radius: 1-4个数字/1-4个数字,前面是水平,后面是垂直,不给“/”表示水平和垂直一样,举例如下:
-
<head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <style><br /> // 如果是两个数字,则左上角和右下角一样,右上角和左下角一样 .box{width:200px;height:200px;border:1px solid #000; border-radius:20px;} </style></head><body> <div class="box"></div></body>
-
<head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <style> // 100px/150px表示每个角的水平和垂直,同时可以前面四个/后面四个,则分别表示四个角的水平和四个角的垂直 .box{width:200px;height:300px;border:1px solid #000;border-radius:100px/150px;} </style></head><body> <div class="box"></div></body>
- 边框背景
-
<head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title><style> .box{width:200px;height:60px; -webkit-border-image:url(bt_blue.png) 0 10;border-left-width:10px;border-right-width:10px;}</style></head><body> <div class="box"></div></body>
- 线性渐变
<head> <meta http-equiv="Content-Type" content="textml; charset=utf-8"> <title>无标题文档</title><style> .box{width:300px;height:300px;border:10px solid #000; background-image:-webkit-linear-gradient(60deg,red,blue);}</style></head><body> <div class="box"></div></body>
- 可以设置多个背景
<head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <style> .box{width:300px;height:300px;background:url(bt_blue.png) no-repeat, url(border.png) repeat-y right 0;} </style></head><body> <div class="box"></div></body>
- border-image:边框图片
- border-image-source: 引入图片
- border-image-slice: 切割图片
- border-image-width: 边框宽度
- border-image-repeat: 图片的排列方式(round 平铺, repeat 重复, stretch 拉伸)
- border-colors:边框颜色
- 背景尺寸: background-size: x, y (100% 100%)
- background-origin: border | padding | content -box,分别表示从border区域开始显示背景,从padding区域开始显示背景,从content区域开始显示背景
- border-clip : border(从border区域向外裁剪背景), padding(从padding区域向外裁剪背景),content(从content区域向外裁剪背景)
- 遮罩

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.

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.


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