From 9f865e645428991dcce9d92c932a86706bb1df10 Mon Sep 17 00:00:00 2001
From: Adam Bradley <adamdbradley@users.noreply.github.com>
Date: Sat, 22 Jan 2022 20:12:58 -0600
Subject: [PATCH] fix: throw error for invalid tag name

---
 src/lib/web-worker/worker-constants.ts | 2 ++
 src/lib/web-worker/worker-document.ts  | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/lib/web-worker/worker-constants.ts b/src/lib/web-worker/worker-constants.ts
index 2f49babe..271516ca 100644
--- a/src/lib/web-worker/worker-constants.ts
+++ b/src/lib/web-worker/worker-constants.ts
@@ -73,3 +73,5 @@ export const windowGetterDimensionMethodNames = ['getComputedStyle'];
 export const eventTargetMethods = /*#__PURE__*/ commaSplit(
   'addEventListener,dispatchEvent,removeEventListener'
 );
+
+export const IS_TAG_REG = /^[A-Z]([A-Z0-9-]*[A-Z0-9])?$/;
diff --git a/src/lib/web-worker/worker-document.ts b/src/lib/web-worker/worker-document.ts
index 4073062f..5aac93ec 100644
--- a/src/lib/web-worker/worker-document.ts
+++ b/src/lib/web-worker/worker-document.ts
@@ -5,9 +5,9 @@ import { getInstanceStateValue } from './worker-state';
 import { getOrCreateNodeInstance } from './worker-constructors';
 import { getPartytownScript } from './worker-exec';
 import { isScriptJsType } from './worker-script';
+import { IS_TAG_REG, WinIdKey } from './worker-constants';
 import type { Node } from './worker-node';
 import { noop, randomId, SCRIPT_TYPE } from '../utils';
-import { WinIdKey } from './worker-constants';
 
 export const DocumentDescriptorMap: PropertyDescriptorMap & ThisType<Node> = {
   body: {
@@ -19,6 +19,9 @@ export const DocumentDescriptorMap: PropertyDescriptorMap & ThisType<Node> = {
   createElement: {
     value(tagName: string) {
       tagName = tagName.toUpperCase();
+      if (!IS_TAG_REG.test(tagName)) {
+        throw tagName + ' not valid';
+      }
 
       const winId = this[WinIdKey];
       const instanceId = randomId();