LibWeb: Parse the scroll-timeline-axis CSS property

Author: https://github.com/Calme1709
Commit: 992b0a4dc6
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6912
Reviewed-by: https://github.com/AtkinsSJ ✅

Libraries/LibWeb/CSS/Enums.json

@@ -110,6 +110,12 @@
     "textarea",
     "textfield"
   ],
+  "axis": [
+    "block",
+    "inline",
+    "x",
+    "y"
+  ],
   "background-attachment": [
     "fixed",
     "local",

Libraries/LibWeb/CSS/Keywords.json

@@ -628,6 +628,7 @@
   "windowtext",
   "wrap",
   "wrap-reverse",
+  "x",
   "x-end",
   "x-large",
   "x-start",
@@ -635,6 +636,7 @@
   "xx-large",
   "xx-small",
   "xxx-large",
+  "y",
   "y-end",
   "y-start",
   "zoom-in",

Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp

@@ -745,6 +745,7 @@ Parser::ParseErrorOr<NonnullRefPtr<StyleValue const>> Parser::parse_css_value(Pr
         return parse_all_as(tokens, [this](auto& tokens) { return parse_translate_value(tokens); });
     case PropertyID::Scale:
         return parse_all_as(tokens, [this](auto& tokens) { return parse_scale_value(tokens); });
+    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::WhiteSpace:

Libraries/LibWeb/CSS/Properties.json

@@ -3440,6 +3440,16 @@
     "affects-layout": false,
     "affects-stacking-context": true
   },
+  "scroll-timeline-axis": {
+    "affects-layout": false,
+    "animation-type": "none",
+    "inherited": false,
+    "initial": "block",
+    "valid-types": [
+      "axis"
+    ],
+    "multiplicity": "coordinating-list"
+  },
   "scroll-timeline-name": {
     "affects-layout": false,
     "animation-type": "none",