2 files changed, 38 insertions, 0 deletions
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.cpp
index a5ef624274..7c39726ab1 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.cpp
@@ -5,6 +5,7 @@
  */
 
 #include <LibJS/Runtime/GlobalObject.h>
+#include <LibJS/Runtime/Intl/Collator.h>
 #include <LibJS/Runtime/Intl/CollatorPrototype.h>
 
 namespace JS::Intl {
@@ -23,6 +24,40 @@ void CollatorPrototype::initialize(GlobalObject& global_object)
 
     // 10.3.2 Intl.Collator.prototype [ @@toStringTag ], https://tc39.es/ecma402/#sec-intl.collator.prototype-@@tostringtag
     define_direct_property(*vm.well_known_symbol_to_string_tag(), js_string(vm, "Intl.Collator"), Attribute::Configurable);
+
+    u8 attr = Attribute::Writable | Attribute::Configurable;
+    define_native_function(vm.names.resolvedOptions, resolved_options, 0, attr);
+}
+
+// 10.3.4 Intl.Collator.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.collator.prototype.resolvedoptions
+JS_DEFINE_NATIVE_FUNCTION(CollatorPrototype::resolved_options)
+{
+    // 1. Let collator be the this value.
+    // 2. Perform ? RequireInternalSlot(collator, [[InitializedCollator]]).
+    auto* collator = TRY(typed_this_object(global_object));
+
+    // 3. Let options be ! OrdinaryObjectCreate(%Object.prototype%).
+    auto* options = Object::create(global_object, global_object.object_prototype());
+
+    // 4. For each row of Table 3, except the header row, in table order, do
+    //     a. Let p be the Property value of the current row.
+    //     b. Let v be the value of collator's internal slot whose name is the Internal Slot value of the current row.
+    //     c. If the current row has an Extension Key value, then
+    //         i. Let extensionKey be the Extension Key value of the current row.
+    //         ii. If %Collator%.[[RelevantExtensionKeys]] does not contain extensionKey, then
+    //             1. Let v be undefined.
+    //     d. If v is not undefined, then
+    //         i. Perform ! CreateDataPropertyOrThrow(options, p, v).
+    MUST(options->create_data_property_or_throw(vm.names.locale, js_string(vm, collator->locale())));
+    MUST(options->create_data_property_or_throw(vm.names.usage, js_string(vm, collator->usage_string())));
+    MUST(options->create_data_property_or_throw(vm.names.sensitivity, js_string(vm, collator->sensitivity_string())));
+    MUST(options->create_data_property_or_throw(vm.names.ignorePunctuation, Value(collator->ignore_punctuation())));
+    MUST(options->create_data_property_or_throw(vm.names.collation, js_string(vm, collator->collation())));
+    MUST(options->create_data_property_or_throw(vm.names.numeric, Value(collator->numeric())));
+    MUST(options->create_data_property_or_throw(vm.names.caseFirst, js_string(vm, collator->case_first_string())));
+
+    // 5. Return options.
+    return options;
 }
 
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.h b/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.h
index 24b3806b85..5dda42be89 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.h
+++ b/Userland/Libraries/LibJS/Runtime/Intl/CollatorPrototype.h
@@ -18,6 +18,9 @@ public:
     explicit CollatorPrototype(GlobalObject&);
     virtual void initialize(GlobalObject&) override;
     virtual ~CollatorPrototype() override = default;
+
+private:
+    JS_DECLARE_NATIVE_FUNCTION(resolved_options);
 };
 
 }