From 3c51bf2a0be7c35f86d2da8c381453b95e6414bf Mon Sep 17 00:00:00 2001
From: toasted-nutbread <toasted-nutbread@users.noreply.github.com>
Date: Tue, 19 Jan 2021 20:48:10 -0500
Subject: [PATCH] Fix DisplayGenerator not working on
 pitch-accents-preview.html (#1276)

---
 ext/mixed/js/display-generator.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/mixed/js/display-generator.js b/ext/mixed/js/display-generator.js
index 0102afbc..0324f16a 100644
--- a/ext/mixed/js/display-generator.js
+++ b/ext/mixed/js/display-generator.js
@@ -22,7 +22,7 @@
  */
 
 class DisplayGenerator {
-    constructor({japaneseUtil, mediaLoader, hotkeyHelpController}) {
+    constructor({japaneseUtil, mediaLoader, hotkeyHelpController=null}) {
         this._japaneseUtil = japaneseUtil;
         this._mediaLoader = mediaLoader;
         this._hotkeyHelpController = hotkeyHelpController;
@@ -38,6 +38,7 @@ class DisplayGenerator {
 
     updateHotkeys() {
         const hotkeyHelpController = this._hotkeyHelpController;
+        if (hotkeyHelpController === null) { return; }
         for (const template of this._templates.getAllTemplates()) {
             hotkeyHelpController.setupNode(template.content);
         }