<!DOCTYPE html> <html> <head> <script> function test() { var elem = document.getElementById("test"); elem.style.width = "350px"; } </script> </head> <body onload="test()"> <iframe id="test" style="width:400px;" src="data:text/html, <html> <style> html { writing-mode:vertical-rl; } div { writing-mode:initial; position:absolute; right:0; padding:5px; } </style> <div>This text should NOT be cut off</div>"> </iframe> </body> </html>