From aab060ffcebae479954355bf02804882935ef8d2 Mon Sep 17 00:00:00 2001
From: Artur Androsovych <arthurandrosovich@gmail.com>
Date: Wed, 20 Apr 2022 17:06:15 +0300
Subject: [PATCH] perf(module:anchor): mark `scroll` listener as passive
 (#7330)

---
 components/anchor/anchor.component.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/components/anchor/anchor.component.ts b/components/anchor/anchor.component.ts
index abb202a88d..295e7f42a9 100644
--- a/components/anchor/anchor.component.ts
+++ b/components/anchor/anchor.component.ts
@@ -3,7 +3,7 @@
  * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
  */
 
-import { Platform } from '@angular/cdk/platform';
+import { normalizePassiveListenerOptions, Platform } from '@angular/cdk/platform';
 import { DOCUMENT } from '@angular/common';
 import {
   AfterViewInit,
@@ -42,6 +42,8 @@ interface Section {
 const NZ_CONFIG_MODULE_NAME: NzConfigKey = 'anchor';
 const sharpMatcherRegx = /#([^#]+)$/;
 
+const passiveEventListenerOptions = normalizePassiveListenerOptions({ passive: true });
+
 @Component({
   selector: 'nz-anchor',
   exportAs: 'nzAnchor',
@@ -143,7 +145,7 @@ export class NzAnchorComponent implements OnDestroy, AfterViewInit, OnChanges {
     }
     this.destroy$.next();
     this.zone.runOutsideAngular(() => {
-      fromEvent(this.getContainer(), 'scroll')
+      fromEvent(this.getContainer(), 'scroll', <AddEventListenerOptions>passiveEventListenerOptions)
         .pipe(throttleTime(50), takeUntil(this.destroy$))
         .subscribe(() => this.handleScroll());
     });