From 836c009d08e62af216956a8bd5288c7c1d92fbe6 Mon Sep 17 00:00:00 2001
From: Troy Morehouse <troymore@nbnet.nb.ca>
Date: Tue, 5 Mar 2019 03:37:38 -0400
Subject: [PATCH] fix(router): remove app from $router.apps array once app
 destroyed (Fixes #2639)

Prevent destroyed apps from causing memory leak in `$router.apps` array.

Fixes #2639
---
 src/index.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index 69c3cc0c8..5c9d9abfc 100644
--- a/src/index.js
+++ b/src/index.js
@@ -91,7 +91,12 @@ export default class VueRouter {
 
     // main app already initialized.
     if (this.app) {
-      return
+     app.$once('hook:destroyed', () {
+       // Clean out app from this.apps array once destroyed
+       const index = this.apps.indexOf(app)
+       if (index > -1) this.apps.splice(index, 1)
+     })
+     return
     }
 
     this.app = app