<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Resetting CSS properties on the <math> element"
href="https://bugs.webkit.org/show_bug.cgi?id=156839">156839</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Resetting CSS properties on the <math> element
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly Build
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>MathML
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>fred.wang@free.fr
</td>
</tr>
<tr>
<th>Depends on</th>
<td>155433
</td>
</tr></table>
<p>
<div>
<pre>Some of this was already done in <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - Reset CSS spacing rules on the <math> element"
href="show_bug.cgi?id=155433">bug 155433</a> and we also have been setting font-family to a fixed list of math fonts for a long time. I'm opening this for the record, although I believe we should fix it when they address a real use case as it was the case for CSS spacing and for the need for math fonts.
It may arguable whether we want to reset or not a specific property. For example, someone might want to do <p style="font-weight: bold;">this is a formula <math><mi>x</mi><mo>+</mo><mi>y</mi></math></p> and expects that the formula is bold. However, math formulas use their own italic, bold etc unicode code points (see <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Add support for mathvariants that cannot be emulated via CSS"
href="show_bug.cgi?id=108778">bug 108778</a>) and math font families are generally not designed to have italic, bold fonts so that would give poor result (see for example <a href="https://github.com/khaledhosny/libertinus/issues/20">https://github.com/khaledhosny/libertinus/issues/20</a> for a discussion)
As a comparison, Gecko resets more rules like writing-mode or font-style:
<a href="https://dxr.mozilla.org/mozilla-central/source/layout/mathml/mathml.css#16">https://dxr.mozilla.org/mozilla-central/source/layout/mathml/mathml.css#16</a>
Note that font-family in Gecko is reset to serif (btw, math fonts are generally serif and sans-serif unicode code points are reserved for special characters, see <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Add support for mathvariants that cannot be emulated via CSS"
href="show_bug.cgi?id=108778">bug 108778</a> again) and the actual selection of the default math font and fallback are listed in font.name.serif.x-math and font.name-list.serif.x-math configurations (accessible from the font preference menu of Firefox):
<a href="https://dxr.mozilla.org/mozilla-central/source/modules/libpref/init/all.js">https://dxr.mozilla.org/mozilla-central/source/modules/libpref/init/all.js</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>