From 87cd5ac9ecb88dd8d384215150e73c7d465bd35f Mon Sep 17 00:00:00 2001
From: William Boman <william@redwill.se>
Date: Thu, 18 Oct 2018 12:56:52 +0200
Subject: [PATCH] service/AppStore: add null check in dispose method

---
 src/services/AppStore.ts | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/services/AppStore.ts b/src/services/AppStore.ts
index 58d0b15f..90aeeaea 100644
--- a/src/services/AppStore.ts
+++ b/src/services/AppStore.ts
@@ -1,4 +1,4 @@
-import { observe } from 'mobx';
+import { observe, Lambda } from 'mobx';
 
 import { OpenAPISpec } from '../types';
 import { loadAndBundleSpec } from '../utils/loadAndBundleSpec';
@@ -58,7 +58,7 @@ export class AppStore {
   marker = new MarkerService();
 
   private scroll: ScrollService;
-  private disposer;
+  private disposer: Lambda | null = null;
 
   constructor(
     spec: OpenAPISpec,
@@ -96,7 +96,9 @@ export class AppStore {
   dispose() {
     this.scroll.dispose();
     this.menu.dispose();
-    this.disposer();
+    if (this.disposer != null) {
+      this.disposer();
+    }
   }
 
   /**