diff --git a/Tests/LibWeb/Text/expected/HTML/Location-search-setter.txt b/Tests/LibWeb/Text/expected/HTML/Location-search-setter.txt
new file mode 100644
index 00000000000..59643e737bd
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/HTML/Location-search-setter.txt
@@ -0,0 +1 @@
+location.search set to ?foo=bar
diff --git a/Tests/LibWeb/Text/input/HTML/Location-search-setter.html b/Tests/LibWeb/Text/input/HTML/Location-search-setter.html
new file mode 100644
index 00000000000..a29619c0896
--- /dev/null
+++ b/Tests/LibWeb/Text/input/HTML/Location-search-setter.html
@@ -0,0 +1,16 @@
+
+
+
diff --git a/Userland/Libraries/LibWeb/HTML/Location.cpp b/Userland/Libraries/LibWeb/HTML/Location.cpp
index 156e19c1a40..f98063a3534 100644
--- a/Userland/Libraries/LibWeb/HTML/Location.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Location.cpp
@@ -310,10 +310,44 @@ WebIDL::ExceptionOr Location::search() const
return TRY_OR_THROW_OOM(vm, String::formatted("?{}", url.query()));
}
-WebIDL::ExceptionOr Location::set_search(String const&)
+// https://html.spec.whatwg.org/multipage/nav-history-apis.html#dom-location-search
+WebIDL::ExceptionOr Location::set_search(String const& value)
{
- auto& vm = this->vm();
- return vm.throw_completion(JS::ErrorType::NotImplemented, "Location.search setter");
+ // The search setter steps are:
+ auto const relevant_document = this->relevant_document();
+
+ // 1. If this's relevant Document is null, then return.
+ if (!relevant_document)
+ return {};
+
+ // 2. If this's relevant Document's origin is not same origin-domain with the entry settings object's origin, then throw a "SecurityError" DOMException.
+ if (!relevant_document->origin().is_same_origin_domain(entry_settings_object().origin()))
+ return WebIDL::SecurityError::create(realm(), "Location's relevant document is not same origin-domain with the entry settings object's origin"_fly_string);
+
+ // 3. Let copyURL be a copy of this's url.
+ auto copy_url = this->url();
+
+ // 4. If the given value is the empty string, set copyURL's query to null.
+ if (value.is_empty()) {
+ copy_url.set_query({});
+ }
+ // 5. Otherwise, run these substeps:
+ else {
+ // 5.1. Let input be the given value with a single leading "?" removed, if any.
+ auto value_as_string_view = value.bytes_as_string_view();
+ auto input = value_as_string_view.substring_view(value_as_string_view.starts_with('?'));
+
+ // 5.2. Set copyURL's query to the empty string.
+ copy_url.set_query(String {});
+
+ // 5.3. Basic URL parse input, with null, the relevant Document's document's character encoding, copyURL as url, and query state as state override.
+ (void)URL::Parser::basic_parse(input, {}, ©_url, URL::Parser::State::Query);
+ }
+
+ // 6. Location-object navigate this to copyURL.
+ TRY(navigate(copy_url));
+
+ return {};
}
// https://html.spec.whatwg.org/multipage/history.html#dom-location-hash