1、Square
<span style="color: #800000;">#square </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>background</span>:<span style="color: #0000ff;"> red</span>; }
2、Rectangle
<span style="color: #800000;">#rectangle </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>background</span>:<span style="color: #0000ff;"> red</span>; }
3、Circle
<span style="color: #800000;">#circle </span>{<br><span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>background</span>:<span style="color: #0000ff;"> red</span>;<span style="color: #ff0000;"> <br>-moz-border-radius</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> <br>-webkit-border-radius</span>:<span style="color: #0000ff;"> 50px</span>;<span style="color: #ff0000;"> border-radius</span>:<span style="color: #0000ff;"> 50px</span>; }<br> <span style="color: #008000;">/*</span><span style="color: #008000;"> Cleaner, but slightly less support: use "50%" as value </span><span style="color: #008000;">*/</span>
4、Oval
<span style="color: #800000;">#oval </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 200px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>background</span>:<span style="color: #0000ff;"> red</span>;<span style="color: #ff0000;"> <br>-moz-border-radius</span>:<span style="color: #0000ff;"> 100px / 50px</span>;<span style="color: #ff0000;"> <br>-webkit-border-radius</span>:<span style="color: #0000ff;"> 100px / 50px</span>;<span style="color: #ff0000;"> <br>border-radius</span>:<span style="color: #0000ff;"> 100px / 50px</span>; } <br><span style="color: #008000;">/*</span><span style="color: #008000;"> Cleaner, but slightly less support: use "50%" as value </span><span style="color: #008000;">*/</span>
5、Triangle Up
<span style="color: #800000;">#triangle-up </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 100px solid red</span>; }
6、Triangle Down
<span style="color: #800000;">#triangle-down </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 100px solid red</span>; }
7、Triangle Left
<span style="color: #800000;">#triangle-left </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 50px solid transparent</span>; }
8、Triangle Right
<span style="color: #800000;">#triangle-right </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 50px solid transparent</span>; }
9、Triangle Top Left
<span style="color: #800000;">#triangle-topleft </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 100px solid transparent</span>; }
10、Triangle Top Right
<span style="color: #800000;">#triangle-topright </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 100px solid transparent</span>; }
11、Triangle Bottom Left
<span style="color: #800000;">#triangle-bottomleft </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 100px solid transparent</span>; }
12、Triangle Bottom Right
<span style="color: #800000;">#triangle-bottomright </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 100px solid transparent</span>; }
13、Curved Tail Arrow
<span style="color: #800000;">#curvedarrow </span>{<span style="color: #ff0000;"> <br>position</span>:<span style="color: #0000ff;"> relative</span>;<br><span style="color: #ff0000;"> width</span>:<span style="color: #0000ff;"> 0</span>;<br><span style="color: #ff0000;"> height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> border-top</span>:<span style="color: #0000ff;"> 9px solid transparent</span>;<br><span style="color: #ff0000;"> border-right</span>:<span style="color: #0000ff;"> 9px solid red</span>;<span style="color: #ff0000;"> <br>-webkit-transform</span>:<span style="color: #0000ff;"> rotate(10deg)</span>;<br><span style="color: #ff0000;"> -moz-transform</span>:<span style="color: #0000ff;"> rotate(10deg)</span>;<span style="color: #ff0000;"> <br>-ms-transform</span>:<span style="color: #0000ff;"> rotate(10deg)</span>;<br><span style="color: #ff0000;"> -o-transform</span>:<span style="color: #0000ff;"> rotate(10deg)</span>; <br>}<span style="color: #800000;"> <br>#curvedarrow:after </span>{<span style="color: #ff0000;"> <br>content</span>:<span style="color: #0000ff;"> ""</span>;<span style="color: #ff0000;"> <br>position</span>:<span style="color: #0000ff;"> absolute</span>;<br><span style="color: #ff0000;"> border</span>:<span style="color: #0000ff;"> 0 solid transparent</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 3px solid red</span>;<span style="color: #ff0000;"> <br>border-radius</span>:<span style="color: #0000ff;"> 20px 0 0 0</span>;<span style="color: #ff0000;"> <br>top</span>:<span style="color: #0000ff;"> -12px</span>;<span style="color: #ff0000;"> <br>left</span>:<span style="color: #0000ff;"> -9px</span>;<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 12px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 12px</span>;<span style="color: #ff0000;"> <br>-webkit-transform</span>:<span style="color: #0000ff;"> rotate(45deg)</span>;<span style="color: #ff0000;"> <br>-moz-transform</span>:<span style="color: #0000ff;"> rotate(45deg)</span>;<span style="color: #ff0000;"> <br>-ms-transform</span>:<span style="color: #0000ff;"> rotate(45deg)</span>;<span style="color: #ff0000;"> <br>-o-transform</span>:<span style="color: #0000ff;"> rotate(45deg)</span>; }
14、Trapezoid
<span style="color: #800000;">#trapezoid </span>{<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 100px</span>; }
15、Parallelogram
<span style="color: #800000;">#parallelogram </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 150px</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 100px</span>;<span style="color: #ff0000;"> <br>-webkit-transform</span>:<span style="color: #0000ff;"> skew(20deg)</span>;<span style="color: #ff0000;"> <br>-moz-transform</span>:<span style="color: #0000ff;"> skew(20deg)</span>;<span style="color: #ff0000;"> <br>-o-transform</span>:<span style="color: #0000ff;"> skew(20deg)</span>;<span style="color: #ff0000;"> <br>background</span>:<span style="color: #0000ff;"> red</span>; }
16、Star (6-points)
<span style="color: #800000;">#star-six </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-bottom</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>position</span>:<span style="color: #0000ff;"> relative</span>; }<span style="color: #800000;"> <br>#star-six:after </span>{<span style="color: #ff0000;"> <br>width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;"> <br>border-left</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-right</span>:<span style="color: #0000ff;"> 50px solid transparent</span>;<span style="color: #ff0000;"> <br>border-top</span>:<span style="color: #0000ff;"> 100px solid red</span>;<span style="color: #ff0000;"> <br>position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;"> <br>content</span>:<span style="color: #0000ff;"> ""</span>;<span style="color: #ff0000;"> <br>top</span>:<span style="color: #0000ff;"> 30px</span>;<span style="color: #ff0000;"> <br>left</span>:<span style="color: #0000ff;"> -50px</span>; }
17、Star (5-points)
<span style="color: #800000;">#star-five </span>{<span style="color: #ff0000;">
margin</span>:<span style="color: #0000ff;"> 50px 0</span>;<span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
color</span>:<span style="color: #0000ff;"> red</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 0px</span>;<span style="color: #ff0000;">
height</span>:<span style="color: #0000ff;"> 0px</span>;<span style="color: #ff0000;">
border-right</span>:<span style="color: #0000ff;"> 100px solid transparent</span>;<span style="color: #ff0000;">
border-bottom</span>:<span style="color: #0000ff;"> 70px solid red</span>;<span style="color: #ff0000;">
border-left</span>:<span style="color: #0000ff;"> 100px solid transparent</span>;<span style="color: #ff0000;">
-moz-transform</span>:<span style="color: #0000ff;"> rotate(35deg)</span>;<span style="color: #ff0000;">
-webkit-transform</span>:<span style="color: #0000ff;"> rotate(35deg)</span>;<span style="color: #ff0000;">
-ms-transform</span>:<span style="color: #0000ff;"> rotate(35deg)</span>;<span style="color: #ff0000;">
-o-transform</span>:<span style="color: #0000ff;"> rotate(35deg)</span>; }<span style="color: #800000;">
#star-five:before </span>{<span style="color: #ff0000;">
border-bottom</span>:<span style="color: #0000ff;"> 80px solid red</span>;<span style="color: #ff0000;">
border-left</span>:<span style="color: #0000ff;"> 30px solid transparent</span>;<span style="color: #ff0000;">
border-right</span>:<span style="color: #0000ff;"> 30px solid transparent</span>;<span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
top</span>:<span style="color: #0000ff;"> -45px</span>;<span style="color: #ff0000;">
left</span>:<span style="color: #0000ff;"> -65px</span>;<span style="color: #ff0000;">
display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
content</span>:<span style="color: #0000ff;"> ''</span>;<span style="color: #ff0000;">
-webkit-transform</span>:<span style="color: #0000ff;"> rotate(-35deg)</span>;<span style="color: #ff0000;">
-moz-transform</span>:<span style="color: #0000ff;"> rotate(-35deg)</span>;<span style="color: #ff0000;"> -
ms-transform</span>:<span style="color: #0000ff;"> rotate(-35deg)</span>;<span style="color: #ff0000;">
-o-transform</span>:<span style="color: #0000ff;"> rotate(-35deg)</span>; }<span style="color: #800000;">
#star-five:after </span>{<span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
display</span>:<span style="color: #0000ff;"> block</span>;<span style="color: #ff0000;">
color</span>:<span style="color: #0000ff;"> red</span>;<span style="color: #ff0000;">
top</span>:<span style="color: #0000ff;"> 3px</span>;<span style="color: #ff0000;">
left</span>:<span style="color: #0000ff;"> -105px</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 0px</span>;<span style="color: #ff0000;">
height</span>:<span style="color: #0000ff;"> 0px</span>;<span style="color: #ff0000;">
border-right</span>:<span style="color: #0000ff;"> 100px solid transparent</span>;<span style="color: #ff0000;">
border-bottom</span>:<span style="color: #0000ff;"> 70px solid red</span>;<span style="color: #ff0000;">
border-left</span>:<span style="color: #0000ff;"> 100px solid transparent</span>;<span style="color: #ff0000;">
-webkit-transform</span>:<span style="color: #0000ff;"> rotate(-70deg)</span>;<span style="color: #ff0000;">
-moz-transform</span>:<span style="color: #0000ff;"> rotate(-70deg)</span>;<span style="color: #ff0000;">
-ms-transform</span>:<span style="color: #0000ff;"> rotate(-70deg)</span>;<span style="color: #ff0000;">
-o-transform</span>:<span style="color: #0000ff;"> rotate(-70deg)</span>;<span style="color: #ff0000;">
content</span>:<span style="color: #0000ff;"> ''</span>; }
18、Pentagon
<span style="color: #800000;">#pentagon </span>{<span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> relative</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 54px</span>;<span style="color: #ff0000;">
border-width</span>:<span style="color: #0000ff;"> 50px 18px 0</span>;<span style="color: #ff0000;">
border-style</span>:<span style="color: #0000ff;"> solid</span>;<span style="color: #ff0000;">
border-color</span>:<span style="color: #0000ff;"> red transparent</span>; }<span style="color: #800000;">
#pentagon:before </span>{<span style="color: #ff0000;"> content</span>:<span style="color: #0000ff;"> ""</span>;<span style="color: #ff0000;">
position</span>:<span style="color: #0000ff;"> absolute</span>;<span style="color: #ff0000;">
height</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
width</span>:<span style="color: #0000ff;"> 0</span>;<span style="color: #ff0000;">
top</span>:<span style="color: #0000ff;"> -85px</span>;<span style="color: #ff0000;">
left</span>:<span style="color: #0000ff;"> -18px</span>;<span style="color: #ff0000;">
border-width</span>:<span style="color: #0000ff;"> 0 45px 35px</span>;<span style="color: #ff0000;">
border-style</span>:<span style="color: #0000ff;"> solid</span>;<span style="color: #ff0000;">
border-color</span>:<span style="color: #0000ff;"> transparent transparent red</span>; }
Beyond HTML: Essential Technologies for Web DevelopmentApr 26, 2025 am 12:04 AMTo build a website with powerful functions and good user experience, HTML alone is not enough. The following technology is also required: JavaScript gives web page dynamic and interactiveness, and real-time changes are achieved by operating DOM. CSS is responsible for the style and layout of the web page to improve aesthetics and user experience. Modern frameworks and libraries such as React, Vue.js and Angular improve development efficiency and code organization structure.
What are boolean attributes in HTML? Give some examples.Apr 25, 2025 am 12:01 AMBoolean attributes are special attributes in HTML that are activated without a value. 1. The Boolean attribute controls the behavior of the element by whether it exists or not, such as disabled disable the input box. 2.Their working principle is to change element behavior according to the existence of attributes when the browser parses. 3. The basic usage is to directly add attributes, and the advanced usage can be dynamically controlled through JavaScript. 4. Common mistakes are mistakenly thinking that values need to be set, and the correct writing method should be concise. 5. The best practice is to keep the code concise and use Boolean properties reasonably to optimize web page performance and user experience.
How can you validate your HTML code?Apr 24, 2025 am 12:04 AMHTML code can be cleaner with online validators, integrated tools and automated processes. 1) Use W3CMarkupValidationService to verify HTML code online. 2) Install and configure HTMLHint extension in VisualStudioCode for real-time verification. 3) Use HTMLTidy to automatically verify and clean HTML files in the construction process.
HTML vs. CSS and JavaScript: Comparing Web TechnologiesApr 23, 2025 am 12:05 AMHTML, CSS and JavaScript are the core technologies for building modern web pages: 1. HTML defines the web page structure, 2. CSS is responsible for the appearance of the web page, 3. JavaScript provides web page dynamics and interactivity, and they work together to create a website with a good user experience.
HTML as a Markup Language: Its Function and PurposeApr 22, 2025 am 12:02 AMThe 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.
The Future of HTML, CSS, and JavaScript: Web Development TrendsApr 19, 2025 am 12:02 AMThe future trends of HTML are semantics and web components, the future trends of CSS are CSS-in-JS and CSSHoudini, and the future trends of JavaScript are WebAssembly and Serverless. 1. HTML semantics improve accessibility and SEO effects, and Web components improve development efficiency, but attention should be paid to browser compatibility. 2. CSS-in-JS enhances style management flexibility but may increase file size. CSSHoudini allows direct operation of CSS rendering. 3.WebAssembly optimizes browser application performance but has a steep learning curve, and Serverless simplifies development but requires optimization of cold start problems.
HTML: The Structure, CSS: The Style, JavaScript: The BehaviorApr 18, 2025 am 12:09 AMThe 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: Evolution and Trends in Web DesignApr 17, 2025 am 12:12 AMThe 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.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
