From c6f48336fcfe12cd1aa6f9ad175fb3a7c72600d0 Mon Sep 17 00:00:00 2001
From: Alfonso Salces <alfonso.salces@moodle.com>
Date: Wed, 7 Dec 2022 09:54:53 +0100
Subject: [PATCH] MOBILE-4081 swipe-slides: Book chapter tags not always shown

---
 src/addons/mod/book/pages/contents/contents.ts   |  2 ++
 src/core/components/swipe-slides/swipe-slides.ts | 10 ----------
 2 files changed, 2 insertions(+), 10 deletions(-)

diff --git a/src/addons/mod/book/pages/contents/contents.ts b/src/addons/mod/book/pages/contents/contents.ts
index 55fc00732..2bd8a6cbe 100644
--- a/src/addons/mod/book/pages/contents/contents.ts
+++ b/src/addons/mod/book/pages/contents/contents.ts
@@ -64,6 +64,8 @@ export class AddonModBookContentsPage implements OnInit, OnDestroy {
     navigationItems: CoreNavigationBarItem<AddonModBookTocChapter>[] = [];
     slidesOpts: CoreSwipeSlidesOptions = {
         autoHeight: true,
+        observer: true,
+        observeParents: true,
         scrollOnChange: 'top',
     };
 
diff --git a/src/core/components/swipe-slides/swipe-slides.ts b/src/core/components/swipe-slides/swipe-slides.ts
index b5405ac46..e411d6748 100644
--- a/src/core/components/swipe-slides/swipe-slides.ts
+++ b/src/core/components/swipe-slides/swipe-slides.ts
@@ -46,7 +46,6 @@ export class CoreSwipeSlidesComponent<Item = unknown> implements OnChanges, OnDe
     protected resizeListener: CoreEventObserver;
     protected updateSlidesPromise?: Promise<void>;
     protected activeSlideIndexes: number[] = [];
-    protected mutationObserver: MutationObserver;
 
     constructor(
         elementRef: ElementRef<HTMLElement>,
@@ -57,14 +56,6 @@ export class CoreSwipeSlidesComponent<Item = unknown> implements OnChanges, OnDe
         this.resizeListener = CoreDom.onWindowResize(async () => {
             await this.updateSlidesComponent();
         });
-
-        this.mutationObserver = new MutationObserver(() => {
-            setTimeout(async () => {
-                await this.updateSlidesComponent();
-            }, 100);
-        });
-
-        this.mutationObserver.observe(this.hostElement, { subtree: true, childList: true });
     }
 
     /**
@@ -321,7 +312,6 @@ export class CoreSwipeSlidesComponent<Item = unknown> implements OnChanges, OnDe
     ngOnDestroy(): void {
         this.unsubscribe && this.unsubscribe();
         this.resizeListener.off();
-        this.mutationObserver.disconnect();
     }
 
 }