1 files changed, 8 insertions, 7 deletions

diff --git a/packages/browser/src/helpers/browserSupportsWebAuthnAutofill.ts b/packages/browser/src/helpers/browserSupportsWebAuthnAutofill.ts
index afc1176..cfdfb52 100644
--- a/packages/browser/src/helpers/browserSupportsWebAuthnAutofill.ts
+++ b/packages/browser/src/helpers/browserSupportsWebAuthnAutofill.ts
@@ -4,18 +4,19 @@ import { PublicKeyCredentialFuture } from '@simplewebauthn/typescript-types';
  * Determine if the browser supports conditional UI, so that WebAuthn credentials can
  * be shown to the user in the browser's typical password autofill popup.
  */
-export async function browserSupportsWebAuthnAutofill(): Promise<boolean> {
+export function browserSupportsWebAuthnAutofill(): Promise<boolean> {
   /**
    * I don't like the `as unknown` here but there's a `declare var PublicKeyCredential` in
    * TS' DOM lib that's making it difficult for me to just go `as PublicKeyCredentialFuture` as I
    * want. I think I'm fine with this for now since it's _supposed_ to be temporary, until TS types
    * have a chance to catch up.
    */
-  const globalPublicKeyCredential =
-    window.PublicKeyCredential as unknown as PublicKeyCredentialFuture;
+  const globalPublicKeyCredential = window
+    .PublicKeyCredential as unknown as PublicKeyCredentialFuture;
 
-  return (
-    globalPublicKeyCredential.isConditionalMediationAvailable !== undefined &&
-    globalPublicKeyCredential.isConditionalMediationAvailable()
-  );
+  if (globalPublicKeyCredential.isConditionalMediationAvailable === undefined) {
+    return new Promise((resolve) => resolve(false));
+  }
+
+  return globalPublicKeyCredential.isConditionalMediationAvailable();
 }