see pr: niklasvh#2846

nangelina · nangelina · commit 95ea260647aa · 2024-02-08T19:28:44.000+11:00
diff --git a/src/dom/document-cloner.ts b/src/dom/document-cloner.ts
@@ -130,10 +130,13 @@ export class DocumentCloner {
         });
 
         documentClone.open();
-        documentClone.write(`${serializeDoctype(document.doctype)}<html></html>`);
+        if (document.doctype && document.doctype.nodeType === Node.DOCUMENT_TYPE_NODE) {
+            const doctypeClone = document.doctype.cloneNode(false);
+            documentClone.append(doctypeClone);
+        }
         // Chrome scrolls the parent document for some reason after the write to the cloned window???
         restoreOwnerScroll(this.referenceElement.ownerDocument, scrollX, scrollY);
-        documentClone.replaceChild(documentClone.adoptNode(this.documentElement), documentClone.documentElement);
+        documentClone.append(documentClone.adoptNode(this.documentElement));
         documentClone.close();
 
         return iframeLoad;
@@ -568,32 +571,6 @@ export const copyCSSStyles = <T extends HTMLElement | SVGElement>(style: CSSStyl
     return target;
 };
 
-const serializeDoctype = (doctype?: DocumentType | null): string => {
-    let str = '';
-    if (doctype) {
-        str += '<!DOCTYPE ';
-        if (doctype.name) {
-            str += doctype.name;
-        }
-
-        if (doctype.internalSubset) {
-            str += doctype.internalSubset;
-        }
-
-        if (doctype.publicId) {
-            str += `"${doctype.publicId}"`;
-        }
-
-        if (doctype.systemId) {
-            str += `"${doctype.systemId}"`;
-        }
-
-        str += '>';
-    }
-
-    return str;
-};
-
 const restoreOwnerScroll = (ownerDocument: Document | null, x: number, y: number) => {
     if (
         ownerDocument &&
