LibWeb/HTML: Implement the Origin interface

See: https://github.com/whatwg/html/commit/68909b2

Libraries/LibWeb/Bindings/PlatformObject.h

@@ -8,6 +8,7 @@
 
 #include <AK/Weakable.h>
 #include <LibJS/Runtime/Object.h>
+#include <LibURL/Origin.h>
 #include <LibWeb/Export.h>
 #include <LibWeb/Forward.h>
 
@@ -45,6 +46,10 @@ public:
 
     JS::ThrowCompletionOr<bool> is_named_property_exposed_on_object(JS::PropertyKey const&) const;
 
+    // https://html.spec.whatwg.org/multipage/browsers.html#extract-an-origin
+    // Platform objects have an extract an origin operation, which returns null unless otherwise specified.
+    virtual Optional<URL::Origin> extract_an_origin() const { return {}; }
+
 protected:
     explicit PlatformObject(JS::Realm&, MayInterfereWithIndexedPropertyAccess = MayInterfereWithIndexedPropertyAccess::No);
     explicit PlatformObject(JS::Object& prototype, MayInterfereWithIndexedPropertyAccess = MayInterfereWithIndexedPropertyAccess::No);

Libraries/LibWeb/CMakeLists.txt

@@ -350,6 +350,7 @@ set(SOURCES
     DOM/Utils.cpp
     DOM/XMLDocument.cpp
     DOMURL/DOMURL.cpp
+    DOMURL/Origin.cpp
     DOMURL/URLSearchParams.cpp
     DOMURL/URLSearchParamsIterator.cpp
     Dump.cpp

Libraries/LibWeb/DOMURL/DOMURL.cpp

@@ -482,4 +482,11 @@ Optional<URL::URL> parse(StringView input, Optional<URL::URL const&> base_url, O
     return url.release_value();
 }
 
+// FIXME: At time of writing, still open spec MR: https://github.com/whatwg/url/pull/892
+Optional<URL::Origin> DOMURL::extract_an_origin() const
+{
+    // Objects implementing the URL interface's extract an origin steps are to return this's URL's origin. [[HTML]]
+    return m_url.origin();
+}
+
 }

Libraries/LibWeb/DOMURL/DOMURL.h

@@ -81,6 +81,8 @@ public:
     Optional<String> const& query() const { return m_url.query(); }
     void set_query(Badge<URLSearchParams>, Optional<String> query) { m_url.set_query(move(query)); }
 
+    virtual Optional<URL::Origin> extract_an_origin() const override;
+
 private:
     DOMURL(JS::Realm&, URL::URL, GC::Ref<URLSearchParams> query);
 

Libraries/LibWeb/DOMURL/Origin.cpp

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibURL/Parser.h>
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/OriginPrototype.h>
+#include <LibWeb/DOMURL/Origin.h>
+
+namespace Web::DOMURL {
+
+GC_DEFINE_ALLOCATOR(Origin);
+
+Origin::Origin(JS::Realm& realm, URL::Origin origin)
+    : PlatformObject(realm)
+    , m_origin(move(origin))
+{
+}
+
+Origin::~Origin() = default;
+
+void Origin::initialize(JS::Realm& realm)
+{
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(Origin);
+    Base::initialize(realm);
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-constructor
+GC::Ref<Origin> Origin::construct_impl(JS::Realm& realm)
+{
+    // The new Origin() constructor steps are to set this's origin to a unique opaque origin.
+    return realm.create<Origin>(realm, URL::Origin::create_opaque());
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-from
+WebIDL::ExceptionOr<GC::Ref<Origin>> Origin::from(JS::VM& vm, JS::Value value)
+{
+    auto& realm = *vm.current_realm();
+
+    // 1. If value is a platform object:
+    if (auto* object = value.as_if<Bindings::PlatformObject>()) {
+        // 1. Let origin be the result of executing value's extract an origin operation.
+        auto origin = object->extract_an_origin();
+
+        // 2. If origin is not null, then return a new Origin object whose origin is origin.
+        if (origin.has_value())
+            return realm.create<Origin>(realm, origin.release_value());
+    }
+    // 2. If value is a string:
+    else if (value.is_string()) {
+        auto string = value.as_string().utf8_string_view();
+
+        // 1. Let parsedURL be the result of basic URL parsing value.
+        auto parsed_url = URL::Parser::basic_parse(string);
+
+        // 2. If parsedURL is not failure, then return a new Origin object whose origin is set to parsedURL's origin.
+        if (parsed_url.has_value())
+            return realm.create<Origin>(realm, parsed_url->origin());
+    }
+
+    // 3. Throw a TypeError.
+    return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Value is not a valid Origin"sv };
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-opaque
+bool Origin::opaque() const
+{
+    // The opaque getter steps are to return true if this's origin is an opaque origin; otherwise false.
+    return m_origin.is_opaque();
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-issameorigin
+bool Origin::is_same_origin(Origin const& other) const
+{
+    // The isSameOrigin(other) method steps are to return true if this's origin is same origin with other's origin;
+    // otherwise false.
+    return m_origin.is_same_origin(other.m_origin);
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-issamesite
+bool Origin::is_same_site(Origin const& other) const
+{
+    // The isSameSite(other) method steps are to return true if this's origin is same site with other's origin;
+    // otherwise false.
+    return m_origin.is_same_site(other.m_origin);
+}
+
+// https://html.spec.whatwg.org/multipage/browsers.html#extract-an-origin
+Optional<URL::Origin> Origin::extract_an_origin() const
+{
+    // Objects implementing the Origin interface's extract an origin steps are to return this's origin.
+    return m_origin;
+}
+
+}

Libraries/LibWeb/DOMURL/Origin.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2025, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibURL/URL.h>
+#include <LibWeb/Bindings/PlatformObject.h>
+#include <LibWeb/WebIDL/ExceptionOr.h>
+
+namespace Web::DOMURL {
+
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-interface
+class Origin : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(Origin, Bindings::PlatformObject);
+    GC_DECLARE_ALLOCATOR(Origin);
+
+public:
+    static GC::Ref<Origin> construct_impl(JS::Realm&);
+    static WebIDL::ExceptionOr<GC::Ref<Origin>> from(JS::VM&, JS::Value);
+
+    bool opaque() const;
+    bool is_same_origin(Origin const&) const;
+    bool is_same_site(Origin const&) const;
+    virtual Optional<URL::Origin> extract_an_origin() const override;
+
+    virtual ~Origin() override;
+
+private:
+    Origin(JS::Realm&, URL::Origin);
+    virtual void initialize(JS::Realm&) override;
+
+    // https://html.spec.whatwg.org/multipage/browsers.html#concept-origin-origin
+    // Origin objects have an associated origin, which holds an origin.
+    URL::Origin m_origin;
+};
+
+}

Libraries/LibWeb/DOMURL/Origin.idl

@@ -0,0 +1,12 @@
+// https://html.spec.whatwg.org/multipage/browsers.html#dom-origin-interface
+[Exposed=*]
+interface Origin {
+    constructor();
+
+    static Origin from(any value);
+
+    readonly attribute boolean opaque;
+
+    boolean isSameOrigin(Origin other);
+    boolean isSameSite(Origin other);
+};

Libraries/LibWeb/HTML/HTMLAnchorElement.h

@@ -20,6 +20,8 @@ class HTMLAnchorElement final
 public:
     virtual ~HTMLAnchorElement() override;
 
+    virtual Optional<URL::Origin> extract_an_origin() const override { return hyperlink_element_utils_extract_an_origin(); }
+
     String rel() const { return get_attribute_value(HTML::AttributeNames::rel); }
     String target() const { return get_attribute_value(HTML::AttributeNames::target); }
     String download() const { return get_attribute_value(HTML::AttributeNames::download); }

Libraries/LibWeb/HTML/HTMLAreaElement.h

@@ -30,6 +30,8 @@ private:
     virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
+    virtual Optional<URL::Origin> extract_an_origin() const final { return hyperlink_element_utils_extract_an_origin(); }
+
     // ^DOM::Element
     virtual void attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value, Optional<FlyString> const& namespace_) override;
     virtual i32 default_tab_index_value() const override;

Libraries/LibWeb/HTML/HTMLHyperlinkElementUtils.cpp

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
- * Copyright (c) 2024, Shannon Booth <shannon@ladybird.org>
+ * Copyright (c) 2024-2025, Shannon Booth <shannon@ladybird.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -524,4 +524,15 @@ void HTMLHyperlinkElementUtils::follow_the_hyperlink(Optional<String> hyperlink_
     MUST(target_navigable->navigate({ .url = url.release_value(), .source_document = hyperlink_element_utils_document(), .referrer_policy = referrer_policy, .user_involvement = user_involvement }));
 }
 
+// https://html.spec.whatwg.org/multipage/links.html#api-for-a-and-area-elements:extract-an-origin
+Optional<URL::Origin> HTMLHyperlinkElementUtils::hyperlink_element_utils_extract_an_origin() const
+{
+    // 1. If this's url is null, then return null.
+    if (!m_url.has_value())
+        return {};
+
+    // 2. Return this's url's origin.
+    return m_url->origin();
+}
+
 }

Libraries/LibWeb/HTML/HTMLHyperlinkElementUtils.h

@@ -63,6 +63,8 @@ protected:
 
     virtual void hyperlink_element_utils_queue_an_element_task(HTML::Task::Source source, Function<void()> steps) = 0;
 
+    Optional<URL::Origin> hyperlink_element_utils_extract_an_origin() const;
+
     void set_the_url();
     void follow_the_hyperlink(Optional<String> hyperlink_suffix, UserNavigationInvolvement = UserNavigationInvolvement::None);
 

Libraries/LibWeb/HTML/MessageEvent.cpp

@@ -102,4 +102,11 @@ void MessageEvent::init_message_event(String const& type, bool bubbles, bool can
     }
 }
 
+// https://html.spec.whatwg.org/multipage/comms.html#the-messageevent-interface:extract-an-origin
+Optional<URL::Origin> MessageEvent::extract_an_origin() const
+{
+    // Objects implementing the MessageEvent interface's extract an origin steps are to return this's relevant settings object's origin.
+    return relevant_settings_object(*this).origin();
+}
+
 }

Libraries/LibWeb/HTML/MessageEvent.h

@@ -41,6 +41,8 @@ public:
     GC::Ref<JS::Object> ports() const;
     Variant<GC::Root<WindowProxy>, GC::Root<MessagePort>, Empty> source() const;
 
+    virtual Optional<URL::Origin> extract_an_origin() const override;
+
     void init_message_event(String const& type, bool bubbles, bool cancelable, JS::Value data, String const& origin, String const& last_event_id, Optional<MessageEventSource> source, Vector<GC::Root<MessagePort>> const& ports);
 
 private:

Libraries/LibWeb/HTML/Window.h

@@ -100,6 +100,8 @@ public:
     // ^JS::Object
     virtual JS::ThrowCompletionOr<bool> internal_set_prototype_of(JS::Object* prototype) override;
 
+    virtual Optional<URL::Origin> extract_an_origin() const override { return window_or_worker_global_scope_extract_an_origin(); }
+
     Page& page();
     Page const& page() const;
 

Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.cpp

@@ -1277,4 +1277,17 @@ GC::Ref<TrustedTypes::TrustedTypePolicyFactory> WindowOrWorkerGlobalScopeMixin::
     return *m_trusted_type_policy_factory;
 }
 
+// https://html.spec.whatwg.org/multipage/webappapis.html#windoworworkerglobalscope-mixin:extract-an-origin
+Optional<URL::Origin> WindowOrWorkerGlobalScopeMixin::window_or_worker_global_scope_extract_an_origin() const
+{
+    auto relevant_origin = relevant_settings_object(this_impl()).origin();
+
+    // 1. If this's relevant settings object's origin is not same origin-domain with the entry settings object's origin, then return null.
+    if (!relevant_origin.is_same_origin_domain(entry_settings_object().origin()))
+        return {};
+
+    // 2. Return this's relevant settings object's origin.
+    return relevant_origin;
+}
+
 }

Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.h

@@ -106,6 +106,8 @@ public:
 
     [[nodiscard]] GC::Ref<TrustedTypes::TrustedTypePolicyFactory> trusted_types();
 
+    Optional<URL::Origin> window_or_worker_global_scope_extract_an_origin() const;
+
 protected:
     void initialize(JS::Realm&);
     void visit_edges(JS::Cell::Visitor&);

Libraries/LibWeb/HTML/WorkerGlobalScope.h

@@ -66,6 +66,8 @@ public:
     // https://html.spec.whatwg.org/multipage/workers.html#dom-workerglobalscope-self
     GC::Ref<WorkerGlobalScope const> self() const { return *this; }
 
+    virtual Optional<URL::Origin> extract_an_origin() const override { return window_or_worker_global_scope_extract_an_origin(); }
+
     GC::Ref<WorkerLocation> location() const;
     GC::Ref<WorkerNavigator> navigator() const;
     WebIDL::ExceptionOr<void> import_scripts(Vector<String> const& urls, PerformTheFetchHook = nullptr);

Libraries/LibWeb/idl_files.cmake

@@ -121,6 +121,7 @@ libweb_js_bindings(DOM/Text)
 libweb_js_bindings(DOM/TreeWalker)
 libweb_js_bindings(DOM/XMLDocument)
 libweb_js_bindings(DOMURL/DOMURL)
+libweb_js_bindings(DOMURL/Origin)
 libweb_js_bindings(DOMURL/URLSearchParams ITERABLE)
 libweb_js_bindings(Encoding/TextDecoder)
 libweb_js_bindings(Encoding/TextEncoder)

Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp

@@ -105,6 +105,7 @@ static bool is_platform_object(Type const& type)
         "Node"sv,
         "OffscreenCanvas"sv,
         "OffscreenCanvasRenderingContext2D"sv,
+        "Origin"sv,
         "PasswordCredential"sv,
         "Path2D"sv,
         "PerformanceEntry"sv,

Tests/LibWeb/Text/expected/all-window-properties.txt

@@ -323,6 +323,7 @@ OfflineAudioContext
 OffscreenCanvas
 OffscreenCanvasRenderingContext2D
 Option
+Origin
 OscillatorNode
 PageTransitionEvent
 PannerNode

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-comparison.any.txt

@@ -0,0 +1,8 @@
+Harness status: OK
+
+Found 3 tests
+
+3 Pass
+Pass	Comparison of opaque origins.
+Pass	Comparison of tuple origins.
+Pass	Comparisons are schemeful.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-global.any.txt

@@ -0,0 +1,6 @@
+Harness status: OK
+
+Found 1 tests
+
+1 Pass
+Pass	Origin.from(globalThis) is a tuple origin.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-htmlhyperlinkelementutils.window.txt

@@ -0,0 +1,59 @@
+Harness status: OK
+
+Found 54 tests
+
+54 Pass
+Pass	Origin.from(<a>) throws.
+Pass	Origin.from(<area>) throws.
+Pass	Origin.from(<a href="about:blank">) returns an opaque origin.
+Pass	Origin.from(<area href="about:blank">) returns an opaque origin.
+Pass	Origin.from(<a href="data:text/plain,opaque">) returns an opaque origin.
+Pass	Origin.from(<area href="data:text/plain,opaque">) returns an opaque origin.
+Pass	Origin.from(<a href="weird-protocol:whatever">) returns an opaque origin.
+Pass	Origin.from(<area href="weird-protocol:whatever">) returns an opaque origin.
+Pass	Origin.from(<a href="weird-hierarchical-protocol://host/path?etc">) returns an opaque origin.
+Pass	Origin.from(<area href="weird-hierarchical-protocol://host/path?etc">) returns an opaque origin.
+Pass	Origin.from(<a href="blob:weird-protocol:whatever">) returns an opaque origin.
+Pass	Origin.from(<area href="blob:weird-protocol:whatever">) returns an opaque origin.
+Pass	Origin.from(<a href="blob:weird-hierarchical-protocol://host/path?etc">) returns an opaque origin.
+Pass	Origin.from(<area href="blob:weird-hierarchical-protocol://host/path?etc">) returns an opaque origin.
+Pass	Origin.from(<a href="http://site.example">) returns a tuple origin.
+Pass	Origin.from(<area href="http://site.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://site.example">) returns a tuple origin.
+Pass	Origin.from(<area href="https://site.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://site.example:123">) returns a tuple origin.
+Pass	Origin.from(<area href="https://site.example:123">) returns a tuple origin.
+Pass	Origin.from(<a href="http://sub.site.example">) returns a tuple origin.
+Pass	Origin.from(<area href="http://sub.site.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://sub.site.example">) returns a tuple origin.
+Pass	Origin.from(<area href="https://sub.site.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://sub.site.example:123">) returns a tuple origin.
+Pass	Origin.from(<area href="https://sub.site.example:123">) returns a tuple origin.
+Pass	Origin.from(<a href="https://xn--mlauted-m2a.example">) returns a tuple origin.
+Pass	Origin.from(<area href="https://xn--mlauted-m2a.example">) returns a tuple origin.
+Pass	Origin.from(<a href="ftp://ftp.example">) returns a tuple origin.
+Pass	Origin.from(<area href="ftp://ftp.example">) returns a tuple origin.
+Pass	Origin.from(<a href="ws://ws.example">) returns a tuple origin.
+Pass	Origin.from(<area href="ws://ws.example">) returns a tuple origin.
+Pass	Origin.from(<a href="wss://wss.example">) returns a tuple origin.
+Pass	Origin.from(<area href="wss://wss.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://trailing.slash/">) returns a tuple origin.
+Pass	Origin.from(<area href="https://trailing.slash/">) returns a tuple origin.
+Pass	Origin.from(<a href="https://user:pass@site.example">) returns a tuple origin.
+Pass	Origin.from(<area href="https://user:pass@site.example">) returns a tuple origin.
+Pass	Origin.from(<a href="https://has.a.port:1234/and/path">) returns a tuple origin.
+Pass	Origin.from(<area href="https://has.a.port:1234/and/path">) returns a tuple origin.
+Pass	Origin.from(<a href="https://ümlauted.example">) returns a tuple origin.
+Pass	Origin.from(<area href="https://ümlauted.example">) returns a tuple origin.
+Pass	Origin.from(<a href="file:///path/to/a/file.txt">) returns a tuple origin.
+Pass	Origin.from(<area href="file:///path/to/a/file.txt">) returns a tuple origin.
+Pass	Origin.from(<a href="blob:https://example.com/some-guid">) returns a tuple origin.
+Pass	Origin.from(<area href="blob:https://example.com/some-guid">) returns a tuple origin.
+Pass	Origin.from(<a href="ftp://example.com/">) returns a tuple origin.
+Pass	Origin.from(<area href="ftp://example.com/">) returns a tuple origin.
+Pass	Origin.from(<a href="https://example.com/path?query#fragment">) returns a tuple origin.
+Pass	Origin.from(<area href="https://example.com/path?query#fragment">) returns a tuple origin.
+Pass	Origin.from(<a href="https://127.0.0.1/">) returns a tuple origin.
+Pass	Origin.from(<area href="https://127.0.0.1/">) returns a tuple origin.
+Pass	Origin.from(<a href="https://[::1]/">) returns a tuple origin.
+Pass	Origin.from(<area href="https://[::1]/">) returns a tuple origin.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-location.window.txt

@@ -0,0 +1,7 @@
+Harness status: OK
+
+Found 2 tests
+
+2 Pass
+Pass	Origin.from(window.location) throws.
+Pass	Origin.from(Location) throws for cross-origin frames.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-origin.any.txt

@@ -0,0 +1,31 @@
+Harness status: OK
+
+Found 26 tests
+
+26 Pass
+Pass	Origin.from(Origin.from("about:blank")) is an opaque origin.
+Pass	Origin.from(Origin.from("data:text/plain,opaque")) is an opaque origin.
+Pass	Origin.from(Origin.from("weird-protocol:whatever")) is an opaque origin.
+Pass	Origin.from(Origin.from("weird-hierarchical-protocol://host/path?etc")) is an opaque origin.
+Pass	Origin.from(Origin.from("blob:weird-protocol:whatever")) is an opaque origin.
+Pass	Origin.from(Origin.from("blob:weird-hierarchical-protocol://host/path?etc")) is an opaque origin.
+Pass	Origin.from(Origin.from("http://site.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://site.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://site.example:123")) is an tuple origin.
+Pass	Origin.from(Origin.from("http://sub.site.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://sub.site.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://sub.site.example:123")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://xn--mlauted-m2a.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("ftp://ftp.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("ws://ws.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("wss://wss.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://trailing.slash/")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://user:pass@site.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://has.a.port:1234/and/path")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://ümlauted.example")) is an tuple origin.
+Pass	Origin.from(Origin.from("file:///path/to/a/file.txt")) is an tuple origin.
+Pass	Origin.from(Origin.from("blob:https://example.com/some-guid")) is an tuple origin.
+Pass	Origin.from(Origin.from("ftp://example.com/")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://example.com/path?query#fragment")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://127.0.0.1/")) is an tuple origin.
+Pass	Origin.from(Origin.from("https://[::1]/")) is an tuple origin.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-string.any.txt

@@ -0,0 +1,33 @@
+Harness status: OK
+
+Found 28 tests
+
+28 Pass
+Pass	Origin.from("") throws a TypeError.
+Pass	Origin.from("not-valid") throws a TypeError.
+Pass	Origin.from("about:blank") is an opaque origin.
+Pass	Origin.from("data:text/plain,opaque") is an opaque origin.
+Pass	Origin.from("weird-protocol:whatever") is an opaque origin.
+Pass	Origin.from("weird-hierarchical-protocol://host/path?etc") is an opaque origin.
+Pass	Origin.from("blob:weird-protocol:whatever") is an opaque origin.
+Pass	Origin.from("blob:weird-hierarchical-protocol://host/path?etc") is an opaque origin.
+Pass	Origin.from("http://site.example") is an opaque origin.
+Pass	Origin.from("https://site.example") is an opaque origin.
+Pass	Origin.from("https://site.example:123") is an opaque origin.
+Pass	Origin.from("http://sub.site.example") is an opaque origin.
+Pass	Origin.from("https://sub.site.example") is an opaque origin.
+Pass	Origin.from("https://sub.site.example:123") is an opaque origin.
+Pass	Origin.from("https://xn--mlauted-m2a.example") is an opaque origin.
+Pass	Origin.from("ftp://ftp.example") is an opaque origin.
+Pass	Origin.from("ws://ws.example") is an opaque origin.
+Pass	Origin.from("wss://wss.example") is an opaque origin.
+Pass	Origin.from("https://trailing.slash/") is an opaque origin.
+Pass	Origin.from("https://user:pass@site.example") is an opaque origin.
+Pass	Origin.from("https://has.a.port:1234/and/path") is an opaque origin.
+Pass	Origin.from("https://ümlauted.example") is an opaque origin.
+Pass	Origin.from("file:///path/to/a/file.txt") is an opaque origin.
+Pass	Origin.from("blob:https://example.com/some-guid") is an opaque origin.
+Pass	Origin.from("ftp://example.com/") is an opaque origin.
+Pass	Origin.from("https://example.com/path?query#fragment") is an opaque origin.
+Pass	Origin.from("https://127.0.0.1/") is an opaque origin.
+Pass	Origin.from("https://[::1]/") is an opaque origin.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from-url.any.txt

@@ -0,0 +1,33 @@
+Harness status: OK
+
+Found 28 tests
+
+28 Pass
+Pass	Origin.from("") throws a TypeError.
+Pass	Origin.from("not-valid") throws a TypeError.
+Pass	Origin.from("about:blank") is an opaque origin.
+Pass	Origin.from("data:text/plain,opaque") is an opaque origin.
+Pass	Origin.from("weird-protocol:whatever") is an opaque origin.
+Pass	Origin.from("weird-hierarchical-protocol://host/path?etc") is an opaque origin.
+Pass	Origin.from("blob:weird-protocol:whatever") is an opaque origin.
+Pass	Origin.from("blob:weird-hierarchical-protocol://host/path?etc") is an opaque origin.
+Pass	Origin.from("http://site.example") is an opaque origin.
+Pass	Origin.from("https://site.example") is an opaque origin.
+Pass	Origin.from("https://site.example:123") is an opaque origin.
+Pass	Origin.from("http://sub.site.example") is an opaque origin.
+Pass	Origin.from("https://sub.site.example") is an opaque origin.
+Pass	Origin.from("https://sub.site.example:123") is an opaque origin.
+Pass	Origin.from("https://xn--mlauted-m2a.example") is an opaque origin.
+Pass	Origin.from("ftp://ftp.example") is an opaque origin.
+Pass	Origin.from("ws://ws.example") is an opaque origin.
+Pass	Origin.from("wss://wss.example") is an opaque origin.
+Pass	Origin.from("https://trailing.slash/") is an opaque origin.
+Pass	Origin.from("https://user:pass@site.example") is an opaque origin.
+Pass	Origin.from("https://has.a.port:1234/and/path") is an opaque origin.
+Pass	Origin.from("https://ümlauted.example") is an opaque origin.
+Pass	Origin.from("file:///path/to/a/file.txt") is an opaque origin.
+Pass	Origin.from("blob:https://example.com/some-guid") is an opaque origin.
+Pass	Origin.from("ftp://example.com/") is an opaque origin.
+Pass	Origin.from("https://example.com/path?query#fragment") is an opaque origin.
+Pass	Origin.from("https://127.0.0.1/") is an opaque origin.
+Pass	Origin.from("https://[::1]/") is an opaque origin.

Tests/LibWeb/Text/expected/wpt-import/html/browsers/origin/api/origin-from.any.txt

@@ -0,0 +1,14 @@
+Harness status: OK
+
+Found 9 tests
+
+9 Pass
+Pass	Origin.from(null) throws a TypeError.
+Pass	Origin.from(undefined) throws a TypeError.
+Pass	Origin.from(1) throws a TypeError.
+Pass	Origin.from(1.1) throws a TypeError.
+Pass	Origin.from(true) throws a TypeError.
+Pass	Origin.from([object Object]) throws a TypeError.
+Pass	Origin.from(function Object() { [native code] }) throws a TypeError.
+Pass	Origin.from(function Origin() { [native code] }) throws a TypeError.
+Pass	Origin.from(function from() { [native code] }) throws a TypeError.

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-comparison.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin` comparison</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-comparison.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-comparison.any.js

@@ -0,0 +1,50 @@
+// META: title=`Origin` comparison
+
+test(t => {
+  const opaqueA = new Origin();
+  const opaqueB = new Origin();
+  assert_true(opaqueA.opaque);
+  assert_true(opaqueB.opaque);
+
+  assert_true(opaqueA.isSameOrigin(opaqueA), "Opaque origin should be same-origin with itself.");
+  assert_true(opaqueA.isSameSite(opaqueA), "Opaque origin should be same-site with itself.");
+  assert_false(opaqueA.isSameOrigin(opaqueB), "Opaque origin should not be same-origin with another opaque origin.");
+  assert_false(opaqueA.isSameSite(opaqueB), "Opaque origin should not be same-site with another opaque origin.");
+}, "Comparison of opaque origins.");
+
+test(t => {
+  const a = Origin.from("https://a.example");
+  const a_a = Origin.from("https://a.a.example");
+  const b_a = Origin.from("https://b.a.example");
+  const b = Origin.from("https://b.example");
+  const b_b = Origin.from("https://b.b.example");
+
+  assert_true(a.isSameOrigin(a), "Origin should be same-origin with itself.");
+  assert_false(a.isSameOrigin(a_a), "Origins with different subdomains should not be same-origin.");
+  assert_false(a.isSameOrigin(b_a), "Origins with different subdomains should not be same-origin.");
+  assert_false(a.isSameOrigin(b), "Origins with different domains should not be same-origin.");
+  assert_false(a.isSameOrigin(b_b), "Origins with different domains should not be same-origin.");
+
+  assert_true(a.isSameSite(a), "Origin should be same-site with itself.");
+  assert_true(a.isSameSite(a_a), "Origins with same registrable domain should be same-site.");
+  assert_true(a.isSameSite(b_a), "Origins with same registrable domain should be same-site.");
+  assert_false(a.isSameSite(b), "Origins with different registrable domains should not be same-site.");
+  assert_false(a.isSameSite(b_b), "Origins with different registrable domains should not be same-site.");
+
+  assert_true(a_a.isSameSite(a), "Origins with same registrable domain should be same-site.");
+  assert_true(a_a.isSameSite(a_a), "Origin should be same-site with itself.");
+  assert_true(a_a.isSameSite(b_a), "Origins with same registrable domain should be same-site.");
+  assert_false(a_a.isSameSite(b), "Origins with different registrable domains should not be same-site.");
+  assert_false(a_a.isSameSite(b_b), "Origins with different registrable domains should not be same-site.");
+}, "Comparison of tuple origins.");
+
+test(t => {
+  const http = Origin.from("http://a.example");
+  const https = Origin.from("https://a.example");
+
+  assert_false(http.isSameOrigin(https), "http is not same-site with https");
+  assert_false(https.isSameOrigin(http), "https is not same-site with http");
+
+  assert_false(http.isSameSite(https), "http is not same-site with https");
+  assert_false(https.isSameSite(http), "https is not same-site with http");
+}, "Comparisons are schemeful.");

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-global.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(WindowOrWorkerGlobalScope)`</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="../../../../common/get-host-info.sub.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-global.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-global.any.js

@@ -0,0 +1,10 @@
+// META: title=`Origin.from(WindowOrWorkerGlobalScope)`
+// META: global=window,worker
+// META: script=/common/get-host-info.sub.js
+
+test(t => {
+  const origin = Origin.from(globalThis);
+  assert_true(!!origin);
+  assert_false(origin.opaque, "Origin should not be opaque.");
+  assert_true(origin.isSameOrigin(Origin.from(get_host_info().ORIGIN)));
+}, `Origin.from(globalThis) is a tuple origin.`);

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-htmlhyperlinkelementutils.window.html

@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(HTMLHyperlinkElementUtils)`</title>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="resources/serializations.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-htmlhyperlinkelementutils.window.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-htmlhyperlinkelementutils.window.js

@@ -0,0 +1,54 @@
+// META: title=`Origin.from(HTMLHyperlinkElementUtils)`
+// META: script=resources/serializations.js
+
+test(t => {
+  const invalid = document.createElement("a");
+  assert_throws_js(TypeError, _ => Origin.from(invalid));
+}, `Origin.from(<a>) throws.`);
+
+test(t => {
+  const invalid = document.createElement("area");
+  assert_throws_js(TypeError, _ => Origin.from(invalid));
+}, `Origin.from(<area>) throws.`);
+
+for (const opaque of urls.opaque) {
+  // <a>
+  test(t => {
+    const a = document.createElement("a");
+    a.href = opaque;
+    const origin = Origin.from(a);
+    assert_true(!!origin);
+    assert_true(origin.opaque);
+  }, `Origin.from(<a href="${opaque}">) returns an opaque origin.`);
+
+  // <area>
+  test(t => {
+    const area = document.createElement("area");
+    area.href = opaque;
+    const origin = Origin.from(area);
+    assert_true(!!origin);
+    assert_true(origin.opaque);
+  }, `Origin.from(<area href="${opaque}">) returns an opaque origin.`);
+}
+
+for (const tuple of urls.tuple) {
+  // <a>
+  test(t => {
+    const a = document.createElement("a");
+    a.href = tuple;
+    const origin = Origin.from(a);
+    assert_true(!!origin);
+    assert_false(origin.opaque);
+  }, `Origin.from(<a href="${tuple}">) returns a tuple origin.`);
+
+  // <area>
+  test(t => {
+    const area = document.createElement("area");
+    area.href = tuple;
+    const origin = Origin.from(area);
+    assert_true(!!origin);
+    assert_false(origin.opaque);
+  }, `Origin.from(<area href="${tuple}">) returns a tuple origin.`);
+}
+
+

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-location.window.html

@@ -0,0 +1,8 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(Location)`</title>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="../../../../common/get-host-info.sub.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-location.window.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-location.window.js

@@ -0,0 +1,15 @@
+// META: title=`Origin.from(Location)`
+// META: script=/common/get-host-info.sub.js
+
+test(t => {
+  assert_throws_js(TypeError, _ => Origin.from(window.location));
+}, `Origin.from(window.location) throws.`);
+
+async_test(t => {
+  const el = document.createElement('iframe');
+  el.src = get_host_info().REMOTE_ORIGIN + "/common/blank.html";
+  el.onload = t.step_func_done(_ => {
+    assert_throws_js(TypeError, _ => Origin.from(el.contentWindow.location));
+  });
+  document.body.appendChild(el);
+}, `Origin.from(Location) throws for cross-origin frames.`);

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-origin.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(URL)`</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="resources/serializations.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-origin.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-origin.any.js

@@ -0,0 +1,22 @@
+// META: title=`Origin.from(URL)`
+// META: script=resources/serializations.js
+
+for (const opaque of urls.opaque) {
+  test(t => {
+    const originFromString = Origin.from(opaque);
+    const origin = Origin.from(originFromString);
+    assert_true(!!origin);
+    assert_true(origin.opaque, "Origin should be opaque.");
+    assert_true(origin.isSameOrigin(originFromString));
+  }, `Origin.from(Origin.from(${JSON.stringify(opaque)})) is an opaque origin.`);
+}
+
+for (const tuple of urls.tuple) {
+  test(t => {
+    const originFromString = Origin.from(tuple);
+    const origin = Origin.from(originFromString);
+    assert_true(!!origin);
+    assert_false(origin.opaque, "Origin should be opaque.");
+    assert_true(origin.isSameOrigin(originFromString));
+  }, `Origin.from(Origin.from(${JSON.stringify(tuple)})) is an tuple origin.`);
+}

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-string.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(String)`</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="resources/serializations.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-string.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-string.any.js

@@ -0,0 +1,24 @@
+// META: title=`Origin.from(String)`
+// META: script=resources/serializations.js
+
+for (const invalid of urls.invalid) {
+  test(t => {
+    assert_throws_js(TypeError, _ => Origin.from(invalid));
+  }, `Origin.from(${JSON.stringify(invalid)}) throws a TypeError.`);
+}
+
+for (const opaque of urls.opaque) {
+  test(t => {
+    const origin = Origin.from(opaque);
+    assert_true(!!origin);
+    assert_true(origin.opaque, "Origin should be opaque.");
+  }, `Origin.from(${JSON.stringify(opaque)}) is an opaque origin.`);
+}
+
+for (const tuple of urls.tuple) {
+  test(t => {
+    const origin = Origin.from(tuple);
+    assert_true(!!origin);
+    assert_false(origin.opaque, "Origin should not be opaque.");
+  }, `Origin.from(${JSON.stringify(tuple)}) is an opaque origin.`);
+}

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-url.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from(URL)`</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="resources/serializations.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from-url.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from-url.any.js

@@ -0,0 +1,24 @@
+// META: title=`Origin.from(URL)`
+// META: script=resources/serializations.js
+
+for (const invalid of urls.invalid) {
+  test(t => {
+    assert_throws_js(TypeError, _ => Origin.from(new URL(invalid)));
+  }, `Origin.from(${JSON.stringify(invalid)}) throws a TypeError.`);
+}
+
+for (const opaque of urls.opaque) {
+  test(t => {
+    const origin = Origin.from(new URL(opaque));
+    assert_true(!!origin);
+    assert_true(origin.opaque, "Origin should be opaque.");
+  }, `Origin.from(${JSON.stringify(opaque)}) is an opaque origin.`);
+}
+
+for (const tuple of urls.tuple) {
+  test(t => {
+    const origin = Origin.from(new URL(tuple));
+    assert_true(!!origin);
+    assert_false(origin.opaque, "Origin should not be opaque.");
+  }, `Origin.from(${JSON.stringify(tuple)}) is an opaque origin.`);
+}

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from.any.html

@@ -0,0 +1,15 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>`Origin.from()`</title>
+<script>
+self.GLOBAL = {
+  isWindow: function() { return true; },
+  isWorker: function() { return false; },
+  isShadowRealm: function() { return false; },
+};
+</script>
+<script src="../../../../resources/testharness.js"></script>
+<script src="../../../../resources/testharnessreport.js"></script>
+<script src="resources/serializations.js"></script>
+<div id=log></div>
+<script src="../../../../html/browsers/origin/api/origin-from.any.js"></script>

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/origin-from.any.js

@@ -0,0 +1,25 @@
+// META: title=`Origin.from()`
+// META: script=resources/serializations.js
+
+//
+// Invalid Inputs: `null`, `undefined`, invalid URL strings, random objects.
+//
+const invalidInputs = [
+  null,
+  undefined,
+  1,
+  1.1,
+  true,
+  {},
+  Object,
+  Origin,
+  Origin.from,
+];
+
+for (const invalid of invalidInputs) {
+  test(t => {
+    assert_throws_js(TypeError, _ => Origin.from(invalid));
+  }, `Origin.from(${invalid}) throws a TypeError.`);
+}
+
+// Specific object types are tested in `origin-from-*.js` in this directory.

Tests/LibWeb/Text/input/wpt-import/html/browsers/origin/api/resources/serializations.js

@@ -0,0 +1,36 @@
+const urls = {
+  invalid: [
+    "",
+    "not-valid",
+  ],
+  opaque: [
+    "about:blank",
+    "data:text/plain,opaque",
+    "weird-protocol:whatever",
+    "weird-hierarchical-protocol://host/path?etc",
+    "blob:weird-protocol:whatever",
+    "blob:weird-hierarchical-protocol://host/path?etc",
+  ],
+  tuple: [
+    "http://site.example",
+    "https://site.example",
+    "https://site.example:123",
+    "http://sub.site.example",
+    "https://sub.site.example",
+    "https://sub.site.example:123",
+    "https://xn--mlauted-m2a.example",
+    "ftp://ftp.example",
+    "ws://ws.example",
+    "wss://wss.example",
+    "https://trailing.slash/",
+    "https://user:pass@site.example",
+    "https://has.a.port:1234/and/path",
+    "https://ümlauted.example",
+    "file:///path/to/a/file.txt",
+    "blob:https://example.com/some-guid",
+    "ftp://example.com/",
+    "https://example.com/path?query#fragment",
+    "https://127.0.0.1/",
+    "https://[::1]/",
+  ],
+};