From 5f102b1f4f07f6594d5de19ab5656476af5fd443 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Wang?= <fwang@igalia.com>
Date: Fri, 30 Sep 2022 10:08:45 +0200
Subject: [PATCH 1/2] Update compat data for mfrac@linethickness

This commit updates compat data for the linethickness attribute of the <mfrac> element:

- Replace notes about partial implementation in Safari with the use of
  of array of implementations.
- Use "mirror" for Safari iOS, its MathML implementation matches the
  macOS one.
- Add a subfeature for deprecated named values thin, medium, thick
  values that are not part of MathML Core. These were removed in
  Firefox 83 [1] but are still supported by WebKit [2].

[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1664488
[2] https://github.com/WebKit/WebKit/blob/0b0b865747d48a813eee3c2f52da026714bd61aa/Source/WebCore/mathml/MathMLFractionElement.cpp#L59
---
 mathml/elements/mfrac.json | 51 ++++++++++++++++++++++++++++++++------
 1 file changed, 44 insertions(+), 7 deletions(-)

diff --git a/mathml/elements/mfrac.json b/mathml/elements/mfrac.json
index 9976f0357d9db..383421ba14029 100644
--- a/mathml/elements/mfrac.json
+++ b/mathml/elements/mfrac.json
@@ -100,13 +100,17 @@
               "oculus": "mirror",
               "opera": "mirror",
               "opera_android": "mirror",
-              "safari": {
-                "version_added": "5.1",
-                "notes": "Before Safari 9, &lt;length&gt; values are not supported. Only <code>0</code>, <code>thin</code>, <code>medium</code>, and <code>thick</code> are supported."
-              },
-              "safari_ios": {
-                "version_added": false
-              },
+              "safari": [
+                {
+                  "version_added": "9"
+                },
+                {
+                  "version_added": "5.1",
+                  "partial_implementation": true,
+                  "notes": "Only <code>0</code>, <code>thin</code>, <code>medium</code>, and <code>thick</code> are supported."
+                }
+              ],
+              "safari_ios": "mirror",
               "samsunginternet_android": "mirror",
               "webview_android": "mirror"
             },
@@ -115,6 +119,39 @@
               "standard_track": true,
               "deprecated": false
             }
+          },
+          "thin_medium_thick": {
+            "__compat": {
+              "support": {
+                "chrome": {
+                  "version_added": false
+                },
+                "chrome_android": "mirror",
+                "edge": "mirror",
+                "firefox": {
+                  "version_added": "1",
+                  "version_removed": "83"
+                },
+                "firefox_android": "mirror",
+                "ie": {
+                  "version_added": false
+                },
+                "oculus": "mirror",
+                "opera": "mirror",
+                "opera_android": "mirror",
+                "safari": {
+                  "version_added": "5.1"
+                },
+                "safari_ios": "mirror",
+                "samsunginternet_android": "mirror",
+                "webview_android": "mirror"
+              },
+              "status": {
+                "experimental": false,
+                "standard_track": true,
+                "deprecated": true
+              }
+            }
           }
         },
         "numalign": {

From 0f34aa0c1eacc9ff5ea341dfedd72f98f6973fd2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Wang?= <fwang@igalia.com>
Date: Fri, 30 Sep 2022 12:17:20 +0200
Subject: [PATCH 2/2] add description

---
 mathml/elements/mfrac.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mathml/elements/mfrac.json b/mathml/elements/mfrac.json
index 383421ba14029..8deb1cdc5917b 100644
--- a/mathml/elements/mfrac.json
+++ b/mathml/elements/mfrac.json
@@ -122,6 +122,7 @@
           },
           "thin_medium_thick": {
             "__compat": {
+              "description": "<code>thin</code>, <code>medium</code>, <code>thick</code> values",
               "support": {
                 "chrome": {
                   "version_added": false