From c41e4d019587614e58a60a1843c89c6115084d55 Mon Sep 17 00:00:00 2001
From: PJ <ipriyanshujain@gmail.com>
Date: Mon, 1 Jun 2026 23:11:05 +0530
Subject: [PATCH] fix(web-runtime): guard global error listeners for
 non-browser hosts

The module registered window error/unhandledrejection listeners at top
level, which threw under Node (the spec-api test runner) where
globalThis.addEventListener is absent. Register only when the API exists;
the real browser run is unaffected.
---
 pkg/spec/src/web-runtime.ts | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/pkg/spec/src/web-runtime.ts b/pkg/spec/src/web-runtime.ts
index 17cc05e..a6edb79 100644
--- a/pkg/spec/src/web-runtime.ts
+++ b/pkg/spec/src/web-runtime.ts
@@ -339,12 +339,14 @@ function recordException(error: unknown): void {
   });
 }
 
-globalThis.addEventListener("error", (event: ErrorEvent) => {
-  recordException(event.error ?? event.message);
-});
-globalThis.addEventListener("unhandledrejection", (event: PromiseRejectionEvent) => {
-  recordException(event.reason);
-});
+if (typeof globalThis.addEventListener === "function") {
+  globalThis.addEventListener("error", (event: ErrorEvent) => {
+    recordException(event.error ?? event.message);
+  });
+  globalThis.addEventListener("unhandledrejection", (event: PromiseRejectionEvent) => {
+    recordException(event.reason);
+  });
+}
 
 function buildState(): unknown {
   return {