From dfe6aa8cbc35e8ba463ecd83456fda3d32aa128c Mon Sep 17 00:00:00 2001
From: Kishen Kumar <e0424700@u.nus.edu>
Date: Wed, 11 Dec 2024 14:25:35 +0800
Subject: [PATCH] fix(MultiSelectProvider.tsx): double addition on mobile
 (#817)

* fix(MultiSelectProvider.tsx): double addition on mobile

* chore: remove nullish operator

---------

Co-authored-by: KishenKumarrrrr <kishen@open.gov.sg>
---
 .../camp/src/MultiSelect/MultiSelectProvider.tsx     | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/camp/src/MultiSelect/MultiSelectProvider.tsx b/packages/camp/src/MultiSelect/MultiSelectProvider.tsx
index bcb43d56..ff19e65e 100644
--- a/packages/camp/src/MultiSelect/MultiSelectProvider.tsx
+++ b/packages/camp/src/MultiSelect/MultiSelectProvider.tsx
@@ -163,11 +163,13 @@ export const MultiSelectProvider = ({
   } = useMultipleSelection<(typeof items)[0]>({
     selectedItems,
     onSelectedItemsChange: ({ selectedItems }) => {
-      onChange(
-        selectedItems
-          ?.filter((item) => !isItemDisabled(item))
-          .map(itemToValue) ?? [],
-      )
+      onChange([
+        ...new Set(
+          selectedItems
+            ?.filter((item) => !isItemDisabled(item))
+            .map(itemToValue),
+        ),
+      ])
     },
     itemToString: itemToLabelString,
     stateReducer: (_state, { changes, type }) => {