From 2664587749e45100a04f70796733de162b26cdf7 Mon Sep 17 00:00:00 2001
From: Liam DeBeasi <liamdebeasi@users.noreply.github.com>
Date: Fri, 10 Jul 2020 09:38:58 -0400
Subject: [PATCH] fix(angular): per-page animations now work with swipe to go
 back (#21706)

resolves #21692
---
 angular/src/directives/navigation/stack-controller.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/angular/src/directives/navigation/stack-controller.ts b/angular/src/directives/navigation/stack-controller.ts
index 3274277833..a7713fb80a 100644
--- a/angular/src/directives/navigation/stack-controller.ts
+++ b/angular/src/directives/navigation/stack-controller.ts
@@ -127,7 +127,7 @@ export class StackController {
      * Save any custom animation so that navigating
      * back will use this custom animation by default.
      */
-    if (animationBuilder !== undefined && leavingView) {
+    if (leavingView) {
       leavingView.animationBuilder = animationBuilder;
     }
 
@@ -190,13 +190,16 @@ export class StackController {
     if (leavingView) {
       const views = this.getStack(leavingView.stackId);
       const enteringView = views[views.length - 2];
+      const customAnimation = enteringView.animationBuilder;
+
       return this.wait(() => {
         return this.transition(
           enteringView, // entering view
           leavingView, // leaving view
           'back',
           this.canGoBack(2),
-          true
+          true,
+          customAnimation
         );
       });
     }