From 3b8ea5edbe08e9feac7fdeed0f5adf1b0ca19fc6 Mon Sep 17 00:00:00 2001
From: Bram Kragten <mail@bramkragten.nl>
Date: Tue, 27 Jun 2023 18:29:37 +0200
Subject: [PATCH] Add keyfunction to datatable virtualizer (#17049)

---
 src/components/data-table/ha-data-table.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/components/data-table/ha-data-table.ts b/src/components/data-table/ha-data-table.ts
index 8ca1d6f68b..6aa6233b6d 100644
--- a/src/components/data-table/ha-data-table.ts
+++ b/src/components/data-table/ha-data-table.ts
@@ -349,6 +349,7 @@ export class HaDataTable extends LitElement {
                   class="mdc-data-table__content scroller ha-scrollbar"
                   @scroll=${this._saveScrollPos}
                   .items=${this._items}
+                  .keyFunction=${this._keyFunction}
                   .renderItem=${this._renderRow}
                 ></lit-virtualizer>
               `}
@@ -357,6 +358,8 @@ export class HaDataTable extends LitElement {
     `;
   }
 
+  private _keyFunction = (row: DataTableRowData) => row[this.id] || row;
+
   private _renderRow = (row: DataTableRowData, index: number) => {
     // not sure how this happens...
     if (!row) {