From ede4271394f2a702d6a18151b3f0fad44a0a6d2f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20=C3=87etin?=
 <92744169+mehmetcetin01140@users.noreply.github.com>
Date: Mon, 12 Feb 2024 11:47:08 +0300
Subject: [PATCH 1/2] add new methods

---
 src/app/components/utils/objectutils.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/app/components/utils/objectutils.ts b/src/app/components/utils/objectutils.ts
index 95d169637d6..d55d17eabd5 100644
--- a/src/app/components/utils/objectutils.ts
+++ b/src/app/components/utils/objectutils.ts
@@ -1,4 +1,12 @@
 export class ObjectUtils {
+    public static isArray(value, empty = true) {
+        return Array.isArray(value) && (empty || value.length !== 0);
+    }
+
+    public static isObject(value, empty = true) {
+        return value instanceof Object && value.constructor === Object && (empty || Object.keys(value).length !== 0);
+    }
+
     public static equals(obj1: any, obj2: any, field?: string): boolean {
         if (field) return this.resolveFieldData(obj1, field) === this.resolveFieldData(obj2, field);
         else return this.equalsByValue(obj1, obj2);

From ed2c8679ed7dfc37784a1e12f1ab0d320a818528 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20=C3=87etin?=
 <92744169+mehmetcetin01140@users.noreply.github.com>
Date: Mon, 12 Feb 2024 11:55:08 +0300
Subject: [PATCH 2/2] Fixed #12854 - Multiselect | Multiselect with string
 array search not working

---
 src/app/components/multiselect/multiselect.ts | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/app/components/multiselect/multiselect.ts b/src/app/components/multiselect/multiselect.ts
index e51a28054d1..04105dd098d 100755
--- a/src/app/components/multiselect/multiselect.ts
+++ b/src/app/components/multiselect/multiselect.ts
@@ -1038,11 +1038,20 @@ export class MultiSelect implements OnInit, AfterViewInit, AfterContentInit, Aft
         return this.config.translation.aria ? this.config.translation.aria.close : undefined;
     }
 
+ 
     visibleOptions = computed(() => {
         const options = this.group ? this.flatOptions(this.options) : this.options || [];
-
+        const isArrayOfObjects = ObjectUtils.isArray(options) && ObjectUtils.isObject(options[0])
+        
         if (this._filterValue()) {
-            const filteredOptions = this.filterService.filter(options, this.searchFields(), this._filterValue(), this.filterMatchMode, this.filterLocale);
+            let filteredOptions;
+
+            if (isArrayOfObjects) {
+                filteredOptions = this.filterService.filter(options, this.searchFields(), this._filterValue(), this.filterMatchMode, this.filterLocale);
+            } else {
+                filteredOptions = options.filter((option) => option.toLocaleLowerCase().includes(this._filterValue().toLocaleLowerCase()));
+            }
+
             if (this.group) {
                 const optionGroups = this.options || [];
                 const filtered = [];