From 248e1497013733d83578cf759518f798e854aad0 Mon Sep 17 00:00:00 2001
From: Tim Down <158919+timdown@users.noreply.github.com>
Date: Thu, 14 May 2026 09:55:44 +0100
Subject: [PATCH] Default interstitial to monthly plans (#33706)

* Default interstitial to monthly plans except for upgrade, which defaults to user's existing subscription period

* Add tests for interstitial page period toggle defaults

GitOrigin-RevId: fa0ac41e7d8a7bf858b53e0940287b28ef21253d
---
 .../app/src/Features/Subscription/PlansLocator.mjs    | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/services/web/app/src/Features/Subscription/PlansLocator.mjs b/services/web/app/src/Features/Subscription/PlansLocator.mjs
index 281fbb329f..2f34492425 100644
--- a/services/web/app/src/Features/Subscription/PlansLocator.mjs
+++ b/services/web/app/src/Features/Subscription/PlansLocator.mjs
@@ -120,10 +120,19 @@ const recurlyPlanCodeToPlanTypeAndPeriod = {
 }
 
 /**
- * @param {RecurlyPlanCode} recurlyPlanCode
+ * @param {string} key
+ * @returns {key is RecurlyPlanCode}
+ */
+function isRecurlyPlanCode(key) {
+  return Object.hasOwn(recurlyPlanCodeToPlanTypeAndPeriod, key)
+}
+
+/**
+ * @param {string} recurlyPlanCode
  * @returns {PlanTypeAndPeriod | undefined}
  */
 function getPlanTypeAndPeriodFromRecurlyPlanCode(recurlyPlanCode) {
+  if (!isRecurlyPlanCode(recurlyPlanCode)) return undefined
   return recurlyPlanCodeToPlanTypeAndPeriod[recurlyPlanCode]
 }