From c5f273a9dc9b9ddcbab06315a82dc7c970e3ce57 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mehmet=20=C3=87etin?=
 <92744169+mehmetcetin01140@users.noreply.github.com>
Date: Fri, 7 Jun 2024 11:16:17 +0300
Subject: [PATCH] Fixed #15400 - Multiselect: selectionLimit not working if the
 value 0 is provided

---
 src/app/components/multiselect/multiselect.ts | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/src/app/components/multiselect/multiselect.ts b/src/app/components/multiselect/multiselect.ts
index c1e55e47633..afc1f56c8f5 100755
--- a/src/app/components/multiselect/multiselect.ts
+++ b/src/app/components/multiselect/multiselect.ts
@@ -264,7 +264,7 @@ export class MultiSelectItem {
                             <ng-template #builtInFilterElement>
                                 <div
                                     class="p-checkbox p-component"
-                                    *ngIf="showToggleAll && !selectionLimit"
+                                    *ngIf="showToggleAll && selectionLimit === undefined"
                                     [ngClass]="{ 'p-variant-filled': variant === 'filled' || config.inputStyle() === 'filled', 'p-checkbox-disabled': disabled || toggleAllDisabled }"
                                     (click)="onToggleAll($event)"
                                     (keydown)="onHeaderCheckboxKeyDown($event)"
@@ -1179,15 +1179,7 @@ export class MultiSelect implements OnInit, AfterViewInit, AfterContentInit, Aft
         return ObjectUtils.isNotEmpty(this.maxSelectedLabels) && this.modelValue() && this.modelValue().length > this.maxSelectedLabels ? this.modelValue().slice(0, this.maxSelectedLabels) : this.modelValue();
     });
 
-    constructor(
-        public el: ElementRef,
-        public renderer: Renderer2,
-        public cd: ChangeDetectorRef,
-        public zone: NgZone,
-        public filterService: FilterService,
-        public config: PrimeNGConfig,
-        public overlayService: OverlayService
-    ) {
+    constructor(public el: ElementRef, public renderer: Renderer2, public cd: ChangeDetectorRef, public zone: NgZone, public filterService: FilterService, public config: PrimeNGConfig, public overlayService: OverlayService) {
         effect(() => {
             const modelValue = this.modelValue();
 
@@ -1216,6 +1208,9 @@ export class MultiSelect implements OnInit, AfterViewInit, AfterContentInit, Aft
     }
 
     maxSelectionLimitReached() {
+        if (this.selectionLimit === 0) {
+            return true;
+        }
         return this.selectionLimit && this.modelValue() && this.modelValue().length === this.selectionLimit;
     }