From fc07a039bb79cc7647b7ba7edee46e4f019093e0 Mon Sep 17 00:00:00 2001
From: Michael Hunteman <michael@huntm.net>
Date: Wed, 27 Mar 2024 18:24:55 -0700
Subject: Use ref instead of state for previous party size

---
 src/components/RsvpForm.tsx | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/components/RsvpForm.tsx b/src/components/RsvpForm.tsx
index a1e4fa8..a6e7036 100644
--- a/src/components/RsvpForm.tsx
+++ b/src/components/RsvpForm.tsx
@@ -12,7 +12,7 @@ import {
 import { useForm, Controller, useFieldArray } from 'react-hook-form';
 import { useOutletContext } from 'react-router-dom';
 import { useUpdateGuestMutation, Guest } from '../apiSlice';
-import { useState } from 'react';
+import { useRef } from 'react';
 
 type FormValues = {
   id: number;
@@ -31,7 +31,7 @@ type FormValues = {
 function RsvpForm() {
   const [updateGuest] = useUpdateGuestMutation();
   const guest: Guest = useOutletContext();
-  const [previousPartySize, setPreviousPartySize] = useState(1);
+  const previousPartySize = useRef(0);
 
   const {
     register,
@@ -62,21 +62,25 @@ function RsvpForm() {
 
   const handleParty = () => {
     const partySize = Number(watch('partySize'));
-    if (partySize > previousPartySize && partySize > 1 && partySize < 10) {
+    if (
+      partySize > previousPartySize.current &&
+      partySize > 1 &&
+      partySize < 10
+    ) {
       append(
-        new Array(partySize - previousPartySize).fill({
+        new Array(partySize - previousPartySize.current).fill({
           firstName: '',
           lastName: '',
         })
       );
-      setPreviousPartySize(partySize);
-    } else if (partySize < previousPartySize && partySize > 0) {
+      previousPartySize.current = partySize;
+    } else if (partySize < previousPartySize.current && partySize > 0) {
       remove(
-        [...Array(previousPartySize - partySize).keys()].map(
+        [...Array(previousPartySize.current - partySize).keys()].map(
           (_, i) => partySize - 1 + i
         )
       );
-      setPreviousPartySize(partySize);
+      previousPartySize.current = partySize;
     }
   };
 
-- 
cgit v1.2.3