From 8581e1b5ce944cfd0bd240aab1ae455464bcf07c Mon Sep 17 00:00:00 2001
From: Jeff <jhuleatt@google.com>
Date: Thu, 8 Aug 2019 11:20:28 -0700
Subject: [PATCH] Messaging: Convert from var to const (#354)

* update firebase SDK version in service worker

* Convert from var to const for consistency
---
 .eslintrc.json                     | 3 +++
 messaging/firebase-messaging-sw.js | 6 +++---
 messaging/index.html               | 2 +-
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/.eslintrc.json b/.eslintrc.json
index cf23c7d40..e7f327b86 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,4 +1,7 @@
 {
+    "parserOptions": {
+        "ecmaVersion": 2017
+    },
     "env": {
         "browser": true
     },
diff --git a/messaging/firebase-messaging-sw.js b/messaging/firebase-messaging-sw.js
index 91e3ca668..ca838aa7c 100644
--- a/messaging/firebase-messaging-sw.js
+++ b/messaging/firebase-messaging-sw.js
@@ -5,7 +5,7 @@ importScripts('/__/firebase/6.3.4/firebase-app.js');
 importScripts('/__/firebase/6.3.4/firebase-messaging.js');
 importScripts('/__/firebase/init.js');
 
-var messaging = firebase.messaging();
+const messaging = firebase.messaging();
 
 /**
  * Here is is the code snippet to initialize Firebase Messaging in the Service
@@ -38,8 +38,8 @@ var messaging = firebase.messaging();
 messaging.setBackgroundMessageHandler(function(payload) {
   console.log('[firebase-messaging-sw.js] Received background message ', payload);
   // Customize notification here
-  var notificationTitle = 'Background Message Title';
-  var notificationOptions = {
+  const notificationTitle = 'Background Message Title';
+  const notificationOptions = {
     body: 'Background Message body.',
     icon: '/firebase-logo.png'
   };
diff --git a/messaging/index.html b/messaging/index.html
index b12ef34fb..9a1f12a52 100644
--- a/messaging/index.html
+++ b/messaging/index.html
@@ -156,7 +156,7 @@ <h4>Needs Permission</h4>
 
   function showToken(currentToken) {
     // Show token in console and UI.
-    var tokenElement = document.querySelector('#token');
+    const tokenElement = document.querySelector('#token');
     tokenElement.textContent = currentToken;
   }