| <!doctype html> | |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1663740"> | |
| <style> | |
| @namespace url(http://www.w3.org/1998/Math/MathML); | |
| * { | |
| all: inherit; | |
| overflow-inline: hidden; | |
| } | |
| </style> | |
| <script> | |
| window.addEventListener('load', () => { | |
| var x = document.getElementById('a') | |
| x.setAttribute('mathvariant', 'double-struck') | |
| x.innerHTML = '<select></select>' | |
| }) | |
| </script> | |
| <math id='a'> |