From 5f58a9f23b8e137463125308b68abc5e1d443715 Mon Sep 17 00:00:00 2001
From: Will Bamberg <wbamberg@mozilla.com>
Date: Thu, 14 Jan 2016 15:08:36 -0800
Subject: [PATCH] added comments to one missing file

---
 page-to-extension-messaging/content-script.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/page-to-extension-messaging/content-script.js b/page-to-extension-messaging/content-script.js
index 74cf4d7..1323af1 100644
--- a/page-to-extension-messaging/content-script.js
+++ b/page-to-extension-messaging/content-script.js
@@ -1,3 +1,7 @@
+/*
+Listen for messages from the page.
+If the message was from the page script, show an alert.
+*/
 window.addEventListener("message", function(event) {
   if (event.source == window &&
       event.data.direction &&
@@ -6,10 +10,16 @@ window.addEventListener("message", function(event) {
   }
 });
 
+/*
+Add messagePageScript() as a listener to click events on
+the "from-content-script" element.
+*/
 var fromContentScript = document.getElementById("from-content-script");
-
 fromContentScript.addEventListener("click", messagePageScript);
 
+/*
+Send a message to the page script.
+*/
 function messagePageScript() {
   window.postMessage({
     direction: "from-content-script",