fix root tagName change

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.0.32] - 2024-05-20
+
+### Fixed
+
+- Fix when root node becomes a new tag ([#38](https://github.com/tentjs/tent/issues/38))
+
 ## [0.0.31] - 2024-05-20
 
 ### Fixed

src/walker.ts

@@ -2,6 +2,12 @@ import { addAttribute } from './attributes';
 import { type Attrs, type TentNode } from './types';
 
 function walker<A extends Attrs>(oldNode: TentNode<A>, newNode: TentNode<A>) {
+  if (oldNode.tagName !== newNode.tagName) {
+    oldNode.replaceWith(newNode);
+
+    return;
+  }
+
   const nc = Array.from(newNode.childNodes, (n) => n as TentNode<A>);
   const oc = Array.from(oldNode.childNodes, (n) => n as TentNode<A>);