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<!DOCTYPE html> <html> <head> <style> #myDIV { background-color: lightblue; border: solid black 1px; block-size: 250px; writing-mode: vertical-rl; } </style> </head> <body> <h1>The block-size Property</h1> <p>Here, the block-size property is affected by the CSS writing-mode property.</p> <div id="myDIV"> <p>This is a DIV element.</p> </div> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/edibu.js"></script> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/tongji.js"></script></body> </html>