LibWeb: Parse the view-timeline-axis CSS property

Author: https://github.com/Calme1709
Commit: 21ff35691a
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6912
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp

@@ -750,6 +750,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue const>> Parser::parse_css_value(Pr
     case PropertyID::ScrollTimelineAxis:
     case PropertyID::ScrollTimelineName:
         return parse_all_as(tokens, [this, property_id](auto& tokens) { return parse_simple_comma_separated_value_list(property_id, tokens); });
+    case PropertyID::ViewTimelineAxis:
     case PropertyID::ViewTimelineName:
         return parse_all_as(tokens, [this, property_id](auto& tokens) { return parse_simple_comma_separated_value_list(property_id, tokens); });
     case PropertyID::WhiteSpace:

Libraries/LibWeb/CSS/Properties.json

@@ -4013,6 +4013,16 @@
       "unitless-length"
     ]
   },
+  "view-timeline-axis": {
+    "affects-layout": false,
+    "animation-type": "none",
+    "inherited": false,
+    "initial": "block",
+    "valid-types": [
+      "axis"
+    ],
+    "multiplicity": "coordinating-list"
+  },
   "view-timeline-name": {
     "affects-layout": false,
     "animation-type": "none",