| <!DOCTYPE html> | |
| <!-- | |
| | Each block-level element generates a principal block-level box that contains | |
| | descendant boxes. | |
| | https://www.w3.org/TR/CSS21/visuren.html#block-boxes | |
| --> | |
| <html> | |
| <head> | |
| <style> | |
| .red { | |
| background-color: #f44336; | |
| height: 100px; | |
| } | |
| .purple { | |
| background-color: #9c27b0; | |
| height: 100%; | |
| } | |
| .green { | |
| background-color: #4caf50; | |
| height: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div class="red"> | |
| <div class="purple"> | |
| <div class="green"></div> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |