[fix] Custom Element initialization in HTML string rendering

(https://blog.dwac.dev/posts/streamable-html-fragments/#upgrade-timing)

Author: TechQuery

package.json

@@ -1,6 +1,6 @@
 {
     "name": "dom-renderer",
-    "version": "2.6.3",
+    "version": "2.6.4",
     "license": "LGPL-3.0-or-later",
     "author": "shiy2008@gmail.com",
     "description": "A light-weight DOM Renderer supports Web components standard & TypeScript language",

source/dist/VDOM.ts

@@ -100,10 +100,13 @@ export class VNode extends VNodeMeta {
         const { tagName, props, style, children, node } = this;
 
         if (tagName.includes('-') && elementTypeOf(tagName) === 'html') {
-            const { body } = (node?.ownerDocument || document).implementation.createHTMLDocument();
+            const currentDocument = node?.ownerDocument || globalThis.document;
+            const { body } = currentDocument.implementation.createHTMLDocument();
 
             new DOMRenderer().render(this, body);
 
+            currentDocument.importNode(body, true);
+
             const shadowRoots = [...findShadowRoots(body)];
 
             yield body.getHTML({ serializableShadowRoots: true, shadowRoots });