1 files changed, 26 insertions, 7 deletions

diff --git a/packages/browser/src/helpers/webAuthnAbortService.ts b/packages/browser/src/helpers/webAuthnAbortService.ts
index 50e00ba..395ceea 100644
--- a/packages/browser/src/helpers/webAuthnAbortService.ts
+++ b/packages/browser/src/helpers/webAuthnAbortService.ts
@@ -1,13 +1,10 @@
-/**
- * A way to cancel an existing WebAuthn request, for example to cancel a
- * WebAuthn autofill authentication request for a manual authentication attempt.
- */
-class WebAuthnAbortService {
+class BaseWebAuthnAbortService {
   private controller: AbortController | undefined;
 
   /**
    * Prepare an abort signal that will help support multiple auth attempts without needing to
-   * reload the page
+   * reload the page. This is automatically called whenever `startRegistration()` and
+   * `startAuthentication()` are called.
    */
   createNewAbortSignal() {
     // Abort any existing calls to navigator.credentials.create() or navigator.credentials.get()
@@ -24,6 +21,28 @@ class WebAuthnAbortService {
     this.controller = newController;
     return newController.signal;
   }
+
+  /**
+   * Manually cancel any active WebAuthn registration or authentication attempt.
+   */
+  cancelCeremony() {
+    if (this.controller) {
+      const abortError = new Error(
+        'Manually cancelling existing WebAuthn API call',
+      );
+      abortError.name = 'AbortError';
+      this.controller.abort(abortError);
+
+      this.controller = undefined;
+    }
+  }
 }
 
-export const webauthnAbortService = new WebAuthnAbortService();
+/**
+ * A service singleton to help ensure that only a single WebAuthn ceremony is active at a time.
+ *
+ * Users of **@simplewebauthn/browser** shouldn't typically need to use this, but it can help e.g.
+ * developers building projects that use client-side routing to better control the behavior of
+ * their UX in response to router navigation events.
+ */
+export const WebAuthnAbortService = new BaseWebAuthnAbortService();