From 216df45874dcbd0e4f98969221d156bc4083b2cd Mon Sep 17 00:00:00 2001
From: Michael Bullington <michael.bullington@mapbox.com>
Date: Tue, 8 Feb 2022 12:14:35 -0500
Subject: [PATCH] fix: :bug: Cross reference no-customized-built-in-elements
 with builtInTagMap

This may change the actual (not expected) behavior of no-customized-built-in-elements in slight ways
---
 lib/rules/no-customized-built-in-elements.js | 8 +++++++-
 test/no-customized-built-in-elements.js      | 3 ++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/rules/no-customized-built-in-elements.js b/lib/rules/no-customized-built-in-elements.js
index 566cc26..7fb2c91 100644
--- a/lib/rules/no-customized-built-in-elements.js
+++ b/lib/rules/no-customized-built-in-elements.js
@@ -1,4 +1,6 @@
 const s = require('../custom-selectors')
+const {builtInTagMap} = require('../tag-names')
+
 module.exports = {
   meta: {
     type: 'problem',
@@ -8,7 +10,11 @@ module.exports = {
   create(context) {
     return {
       [s.HTMLElementClass](node) {
-        if (node.superClass && node.superClass.name !== 'HTMLElement') {
+        if (
+          node.superClass &&
+          node.superClass.name !== 'HTMLElement' &&
+          Object.values(builtInTagMap).includes(node.superClass.name)
+        ) {
           context.report(node, 'Avoid extending built-in elements')
         }
       }
diff --git a/test/no-customized-built-in-elements.js b/test/no-customized-built-in-elements.js
index 6ba1fab..98d328a 100644
--- a/test/no-customized-built-in-elements.js
+++ b/test/no-customized-built-in-elements.js
@@ -7,7 +7,8 @@ ruleTester.run('no-customized-built-in-elements', rule, {
     {code: 'class SomeMap extends Map { }'},
     {code: 'class FooBarElement { }'},
     {code: 'class FooBarElement extends HTMLElement { }'},
-    {code: 'const FooBarElement = class extends HTMLElement { }'}
+    {code: 'const FooBarElement = class extends HTMLElement { }'},
+    {code: 'const FooBarElement = class extends HTMLRandomNotBuiltInElement { }'}
   ],
   invalid: [
     {