<!DOCTYPE html> <html class="reftest-paged"> <head> <title>CSS Test: fieldset fragmentation</title> <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=471015"> <meta name="flags" content="paged"> <style> @page { size:5in 3in; margin:0.5in; } html,body { color:black; background-color:white; font:0.5in/1 monospace; padding:0; margin:0; } fieldset { display: grid; grid-template-rows: repeat(2,auto); padding: 0; margin: 0; border: 0; border: 0.1in solid black; break-inside: avoid; } legend { padding: 0; margin: 0; width: 3em; height: 1em; box-sizing: border-box; background: black; } </style> </head> <body> X <fieldset><legend></legend><x>A</x>B</fieldset> </body> </html>