From ff85fcee1a47ad96719c4430d9d6f20fde942572 Mon Sep 17 00:00:00 2001
From: davidliu <davidliu@deviange.net>
Date: Tue, 14 Apr 2026 20:33:42 +0900
Subject: [PATCH] Polyfill DOMException

---
 .changeset/tough-cities-make.md |  5 +++++
 src/index.tsx                   |  1 +
 src/polyfills/DOMException.ts   | 21 +++++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 .changeset/tough-cities-make.md
 create mode 100644 src/polyfills/DOMException.ts

diff --git a/.changeset/tough-cities-make.md b/.changeset/tough-cities-make.md
new file mode 100644
index 00000000..4bc42538
--- /dev/null
+++ b/.changeset/tough-cities-make.md
@@ -0,0 +1,5 @@
+---
+'@livekit/react-native': patch
+---
+
+Polyfill for DOMException to handle usage in livekit-client
diff --git a/src/index.tsx b/src/index.tsx
index fc9e660c..65af20b4 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,6 +1,7 @@
 import 'well-known-symbols/Symbol.asyncIterator/auto';
 import 'well-known-symbols/Symbol.iterator/auto';
 import './polyfills/MediaRecorderShim';
+import './polyfills/DOMException';
 import { registerGlobals as webrtcRegisterGlobals } from '@livekit/react-native-webrtc';
 import { setupURLPolyfill } from 'react-native-url-polyfill';
 import './polyfills/EncoderDecoderTogether.min.js';
diff --git a/src/polyfills/DOMException.ts b/src/polyfills/DOMException.ts
new file mode 100644
index 00000000..e87c6d77
--- /dev/null
+++ b/src/polyfills/DOMException.ts
@@ -0,0 +1,21 @@
+/**
+ * DOMException is missing in some React Native / JS runtimes but is required by
+ * web APIs (e.g. AbortController, fetch) that may be used in livekit-client.
+ */
+    
+// @ts-expect-error: global may not declare DOMException in RN types.
+if (typeof global.DOMException === 'undefined') {
+  class PolyfillDOMException extends Error {
+    readonly code: number;
+  
+    constructor(message = '', name?: string) {
+      super(message);
+      this.message = message;
+      this.name = name ?? 'Error';
+      this.code = 0;
+      Object.setPrototypeOf(this, PolyfillDOMException.prototype);
+    }
+  };
+  // @ts-expect-error
+  global.DOMException = PolyfillDOMException;
+}
\ No newline at end of file