From 593b23af701c0266851bbc5c55f62dc2e3a05945 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Yi=C4=9Fit=20FINDIKLI?= <yigitfindikli@gmail.com>
Date: Tue, 24 Aug 2021 16:33:58 +0300
Subject: [PATCH] Fixed #10532 - Table Header Checkbox not working when lazy
 loading enabled

---
 src/components/datatable/DataTable.vue | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/components/datatable/DataTable.vue b/src/components/datatable/DataTable.vue
index 365776ed7..505e19c35 100755
--- a/src/components/datatable/DataTable.vue
+++ b/src/components/datatable/DataTable.vue
@@ -1813,7 +1813,8 @@ export default {
         },
         allRowsSelected() {
             const val = this.frozenValue ? [...this.frozenValue, ...this.processedData]: this.processedData;
-            return (val && val.length > 0 && this.selection && this.selection.length > 0 && this.selection.length === val.length);
+            const length = this.lazy ? this.totalRecords : val?.length;
+            return (val && length > 0 && this.selection && this.selection.length > 0 && this.selection.length === length);
         },
         attributeSelector() {
             return UniqueComponentId();