From ee9d470a3b6e9c47f5c33a62a72ae2c6fa7ee98e Mon Sep 17 00:00:00 2001
From: Maksim Ivanov <omaxphp@yandex.ru>
Date: Thu, 30 Nov 2023 12:45:41 +0300
Subject: [PATCH] fix(kit): possible type error reduce of empty array with no
 initial value (#6107)

---
 .../components/bar-chart/bar-chart.component.ts      |  1 +
 .../components/input-time/input-time.component.ts    | 12 +++++++-----
 .../input-time/test/input-time.component.spec.ts     |  2 +-
 .../native-multi-select-group.component.ts           |  2 +-
 .../native-select/native-select-group.component.ts   |  2 +-
 5 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/projects/addon-charts/components/bar-chart/bar-chart.component.ts b/projects/addon-charts/components/bar-chart/bar-chart.component.ts
index 8aca27553231..1c5a85c89c83 100644
--- a/projects/addon-charts/components/bar-chart/bar-chart.component.ts
+++ b/projects/addon-charts/components/bar-chart/bar-chart.component.ts
@@ -94,6 +94,7 @@ export class TuiBarChartComponent {
     private getMax(values: ReadonlyArray<readonly number[]>, collapsed: boolean): number {
         return collapsed
             ? Math.max(
+                  // eslint-disable-next-line no-restricted-syntax
                   ...values.reduce((result, next) =>
                       result.map((value, index) => value + next[index]),
                   ),
diff --git a/projects/kit/components/input-time/input-time.component.ts b/projects/kit/components/input-time/input-time.component.ts
index 70753f24380a..b8498d195998 100644
--- a/projects/kit/components/input-time/input-time.component.ts
+++ b/projects/kit/components/input-time/input-time.component.ts
@@ -296,11 +296,13 @@ export class TuiInputTimeComponent
     }
 
     private findNearestTimeFromItems(value: TuiTime): TuiTime | null {
-        return this.items.reduce((previous, current) =>
-            Math.abs(current.toAbsoluteMilliseconds() - value.toAbsoluteMilliseconds()) <
-            Math.abs(previous.toAbsoluteMilliseconds() - value.toAbsoluteMilliseconds())
-                ? current
-                : previous,
+        return this.items.reduce(
+            (previous, current) =>
+                Math.abs(current.valueOf() - value.valueOf()) <
+                Math.abs(previous.valueOf() - value.valueOf())
+                    ? current
+                    : previous,
+            new TuiTime(0, 0),
         );
     }
 
diff --git a/projects/kit/components/input-time/test/input-time.component.spec.ts b/projects/kit/components/input-time/test/input-time.component.spec.ts
index 634db54819ce..4f1fa69d3667 100644
--- a/projects/kit/components/input-time/test/input-time.component.spec.ts
+++ b/projects/kit/components/input-time/test/input-time.component.spec.ts
@@ -53,7 +53,7 @@ describe(`InputTime`, () => {
         control = new FormControl(new TuiTime(12, 30));
         cleaner = false;
         readOnly = false;
-        items: TuiTime[] | null = [];
+        items: TuiTime[] = [];
         labelOutside = false;
         size: TuiSizeL | TuiSizeS = `l`;
         strict = false;
diff --git a/projects/kit/components/multi-select/native-multi-select/native-multi-select-group.component.ts b/projects/kit/components/multi-select/native-multi-select/native-multi-select-group.component.ts
index 4cfdbda24771..27ee4e9cc03f 100644
--- a/projects/kit/components/multi-select/native-multi-select/native-multi-select-group.component.ts
+++ b/projects/kit/components/multi-select/native-multi-select/native-multi-select-group.component.ts
@@ -41,7 +41,7 @@ export class TuiNativeMultiSelectGroupComponent<
 
     onValueChange(selectedOptions: HTMLSelectElement['selectedOptions']): void {
         const selected = Array.from(selectedOptions).map(option => option.index);
-        const flatItems = this.items?.reduce((acc, val) => acc.concat(val)) || [];
+        const flatItems = this.items?.reduce((acc, val) => acc.concat(val), []) || [];
         const value = flatItems.filter((_, index) => selected.includes(index));
 
         this.host.onSelectionChange(value);
diff --git a/projects/kit/components/select/native-select/native-select-group.component.ts b/projects/kit/components/select/native-select/native-select-group.component.ts
index 9e68f32c2f73..4213103be5f5 100644
--- a/projects/kit/components/select/native-select/native-select-group.component.ts
+++ b/projects/kit/components/select/native-select/native-select-group.component.ts
@@ -49,7 +49,7 @@ export class TuiNativeSelectGroupComponent<T> extends AbstractTuiNativeSelect<
     }
 
     onValueChange(index: number): void {
-        const flatItems = this.items?.reduce((acc, val) => acc.concat(val));
+        const flatItems = this.items?.reduce((acc, val) => acc.concat(val), []);
 
         this.host.onValueChange(flatItems?.[index] || null);
     }