diff --git a/src/browser/webapi/DOMImplementation.zig b/src/browser/webapi/DOMImplementation.zig
index 743cdd95..82405cdd 100644
--- a/src/browser/webapi/DOMImplementation.zig
+++ b/src/browser/webapi/DOMImplementation.zig
@@ -28,19 +28,7 @@ const DOMImplementation = @This();
 _pad: bool = false,
 
 pub fn createDocumentType(_: *const DOMImplementation, qualified_name: []const u8, public_id: ?[]const u8, system_id: ?[]const u8, page: *Page) !*DocumentType {
-    const name = try page.dupeString(qualified_name);
-    // Firefox converts null to the string "null", not empty string
-    const pub_id = if (public_id) |p| try page.dupeString(p) else "null";
-    const sys_id = if (system_id) |s| try page.dupeString(s) else "null";
-
-    const doctype = try page._factory.node(DocumentType{
-        ._proto = undefined,
-        ._name = name,
-        ._public_id = pub_id,
-        ._system_id = sys_id,
-    });
-
-    return doctype;
+    return DocumentType.init(qualified_name, public_id, system_id, page);
 }
 
 pub fn createHTMLDocument(_: *const DOMImplementation, title: ?[]const u8, page: *Page) !*Document {
diff --git a/src/browser/webapi/DocumentType.zig b/src/browser/webapi/DocumentType.zig
index b5429c70..babda434 100644
--- a/src/browser/webapi/DocumentType.zig
+++ b/src/browser/webapi/DocumentType.zig
@@ -19,6 +19,8 @@
 const std = @import("std");
 
 const js = @import("../js/js.zig");
+const Page = @import("../Page.zig");
+
 const Node = @import("Node.zig");
 
 const DocumentType = @This();
@@ -28,6 +30,20 @@ _name: []const u8,
 _public_id: []const u8,
 _system_id: []const u8,
 
+pub fn init(qualified_name: []const u8, public_id: ?[]const u8, system_id: ?[]const u8, page: *Page) !*DocumentType {
+    const name = try page.dupeString(qualified_name);
+    // Firefox converts null to the string "null", not empty string
+    const pub_id = if (public_id) |p| try page.dupeString(p) else "null";
+    const sys_id = if (system_id) |s| try page.dupeString(s) else "null";
+
+    return page._factory.node(DocumentType{
+        ._proto = undefined,
+        ._name = name,
+        ._public_id = pub_id,
+        ._system_id = sys_id,
+    });
+}
+
 pub fn asNode(self: *DocumentType) *Node {
     return self._proto;
 }
@@ -54,6 +70,10 @@ pub fn isEqualNode(self: *const DocumentType, other: *const DocumentType) bool {
         std.mem.eql(u8, self._system_id, other._system_id);
 }
 
+pub fn clone(self: *const DocumentType, page: *Page) !*DocumentType {
+    return .init(self._name, self._public_id, self._system_id, page);
+}
+
 pub const JsApi = struct {
     pub const bridge = js.Bridge(DocumentType);
 
diff --git a/src/browser/webapi/Element.zig b/src/browser/webapi/Element.zig
index d7464661..ec4fc2e6 100644
--- a/src/browser/webapi/Element.zig
+++ b/src/browser/webapi/Element.zig
@@ -1014,7 +1014,7 @@ pub fn getElementsByClassName(self: *Element, class_name: []const u8, page: *Pag
     return collections.NodeLive(.class_name).init(self.asNode(), class_names.items, page);
 }
 
-pub fn cloneElement(self: *Element, deep: bool, page: *Page) !*Node {
+pub fn clone(self: *Element, deep: bool, page: *Page) !*Node {
     const tag_name = self.getTagNameDump();
     const node = try page.createElementNS(self._namespace, tag_name, self._attributes);
 
diff --git a/src/browser/webapi/Node.zig b/src/browser/webapi/Node.zig
index b5dfdebd..03f7ac7f 100644
--- a/src/browser/webapi/Node.zig
+++ b/src/browser/webapi/Node.zig
@@ -664,7 +664,7 @@ pub fn normalize(self: *Node, page: *Page) !void {
     return self._normalize(page.call_arena, &buffer, page);
 }
 
-pub fn cloneNode(self: *Node, deep_: ?bool, page: *Page) error{ OutOfMemory, StringTooLarge, NotSupported, NotImplemented, InvalidCharacterError }!*Node {
+pub fn cloneNode(self: *Node, deep_: ?bool, page: *Page) error{ OutOfMemory, StringTooLarge, NotSupported, NotImplemented, InvalidCharacterError, CloneError }!*Node {
     const deep = deep_ orelse false;
     switch (self._type) {
         .cdata => |cd| {
@@ -676,11 +676,17 @@ pub fn cloneNode(self: *Node, deep_: ?bool, page: *Page) error{ OutOfMemory, Str
                 .processing_instruction => |pi| page.createProcessingInstruction(pi._target, data),
             };
         },
-        .element => |el| return el.cloneElement(deep, page),
+        .element => |el| return el.clone(deep, page),
         .document => return error.NotSupported,
-        .document_type => return error.NotSupported,
+        .document_type => |dt| {
+            const cloned = dt.clone(page) catch return error.CloneError;
+            return cloned.asNode();
+        },
         .document_fragment => |frag| return frag.cloneFragment(deep, page),
-        .attribute => return error.NotSupported,
+        .attribute => |attr| {
+            const cloned = attr.clone(page) catch return error.CloneError;
+            return cloned._proto;
+        },
     }
 }
 
diff --git a/src/browser/webapi/element/Attribute.zig b/src/browser/webapi/element/Attribute.zig
index 76e65868..e0252753 100644
--- a/src/browser/webapi/element/Attribute.zig
+++ b/src/browser/webapi/element/Attribute.zig
@@ -78,6 +78,15 @@ pub fn isEqualNode(self: *const Attribute, other: *const Attribute) bool {
     return std.mem.eql(u8, self.getName(), other.getName()) and std.mem.eql(u8, self.getValue(), other.getValue());
 }
 
+pub fn clone(self: *const Attribute, page: *Page) !*Attribute {
+    return page._factory.node(Attribute{
+        ._proto = undefined,
+        ._element = self._element,
+        ._name = self._name,
+        ._value = self._value,
+    });
+}
+
 pub const JsApi = struct {
     pub const bridge = js.Bridge(Attribute);