<!doctype html> <!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <html><head> <meta charset="utf-8"> <title>Reference: content:none on various table boxes</title> <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1699964"> <link rel="stylesheet" type="text/css" href="/fonts/ahem.css"> <meta name="flags" content="ahem"> <style> html,body { color:black; background-color:white; font:10px/1 Ahem; padding:0; margin:0; } body { margin-left: 3ch; } body * { border:3px solid; } .after::after { content: 'A'; } .before::before { content: 'B'; } x-table { display:table } x-thead { display:table-row-group } x-tr { display:table-row } x-td { display:table-cell } </style> </head> <body> <table><thead><tr><td class="c"></td></tr></thead></table> <table><thead><tr class="c"></tr></thead></table> <table><thead class="c"></thead></table> <table class="c"></thead></table> <table><thead><tr><td class="c"></td><td>PASS</td></tr></thead></table> <table><thead><tr class="c"></tr><tr><td>PASS</td></tr></thead></table> <table><thead class="c"></thead><thead><tr><td>PASS</td></tr></thead></table> <x-table><x-thead><x-tr><x-td class="c"></x-td></x-tr></x-thead></x-table> <x-table><x-thead><x-tr class="c"></x-tr></x-thead></x-table> <x-table><x-thead class="c"></x-thead></x-table> <x-table class="c"></x-table> <x-table><x-thead><x-tr><x-td class="c"></x-td><x-td>PASS</x-td></x-tr></x-thead></x-table> <x-table><x-thead><x-tr class="c"></x-tr><x-tr><x-td>PASS</x-td></x-tr></x-thead></x-table> <x-table><x-thead class="c"></x-thead><x-thead><x-tr><x-td>PASS</x-td></x-tr></x-thead></x-table> </body> </html>