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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- <style>
- div{
- width: 0;
- border-top: 10px solid rgba(0,0,0,0);
- border-left: 10px solid rgba(0,0,0,0);
- border-bottom: 10px solid green;
- /* border-right: 10px solid rgba(0,0,0,0); */
- /* transparent表示透明的颜色 */
- border-right: 10px solid transparent;
- }
- </style>
- </head>
- <body>
- <div></div>
- </body>
- </html>
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