fix(node): fire 'unhandledrejection' event when using node: or npm: imports (#19235)

This commit fixes emitting "unhandledrejection" event when there are
"node:" or "npm:" imports. 

Before this commit the Node "unhandledRejection" event was emitted
using a regular listener for Web "unhandledrejection" event. This
listener was installed before any user listener had a chance to be 
installed which effectively prevent emitting "unhandledrejection" 
events to user code.

Closes https://github.com/denoland/deno/issues/16928

1 files changed, 11 insertions, 1 deletions

diff --git a/runtime/js/99_main.js b/runtime/js/99_main.js
index f0c63df74..91d34272f 100644
--- a/runtime/js/99_main.js
+++ b/runtime/js/99_main.js
@@ -346,7 +346,8 @@ function promiseRejectCallback(type, promise, reason) {
   }
 
   return !!globalThis_.onunhandledrejection ||
-    event.listenerCount(globalThis_, "unhandledrejection") > 0;
+    event.listenerCount(globalThis_, "unhandledrejection") > 0 ||
+    typeof internals.nodeProcessUnhandledRejectionCallback !== "undefined";
 }
 
 function promiseRejectMacrotaskCallback() {
@@ -383,6 +384,15 @@ function promiseRejectMacrotaskCallback() {
     globalThis_.dispatchEvent(rejectionEvent);
     globalThis_.removeEventListener("error", errorEventCb);
 
+    // If event was not yet prevented, try handing it off to Node compat layer
+    // (if it was initialized)
+    if (
+      !rejectionEvent.defaultPrevented &&
+      typeof internals.nodeProcessUnhandledRejectionCallback !== "undefined"
+    ) {
+      internals.nodeProcessUnhandledRejectionCallback(rejectionEvent);
+    }
+
     // If event was not prevented (or "unhandledrejection" listeners didn't
     // throw) we will let Rust side handle it.
     if (rejectionEvent.defaultPrevented) {