From 7431799c113df1ef96d0e397329195a9205a299e Mon Sep 17 00:00:00 2001
From: zPlus <->
Date: Mon, 27 Mar 2017 21:40:03 +0200
Subject: [PATCH] freepost.js: Do not bind "click" event to vote buttons if
 user is not logged in.

---
 javascript/freepost.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/javascript/freepost.js b/javascript/freepost.js
index ee401d73..60e74b57 100644
--- a/javascript/freepost.js
+++ b/javascript/freepost.js
@@ -103,15 +103,20 @@ document.addEventListener ('DOMContentLoaded', function() {
      *   - up arrow
      *   - votes sum
      *   - down arrow
+     * 
+     * However, if the user is not logged in, there's only a text
+     * with the sum of votes, eg. "2 votes" (no <tag> children).
      */
     let vote_sections = document.querySelectorAll ('.vote');
     
     // Bind vote() event to up/down vote arrows
     for (let i = 0; i < vote_sections.length; i++)
-    {
-        vote_sections[i].children[0].addEventListener ('click', function () { vote ('up',   this.parentNode) });
-        vote_sections[i].children[2].addEventListener ('click', function () { vote ('down', this.parentNode) });
-    }
+        // See comment above on the "vote_sections" declaration.
+        if (vote_sections[i].children.length > 0)
+        {
+            vote_sections[i].children[0].addEventListener ('click', function () { vote ('up',   this.parentNode) });
+            vote_sections[i].children[2].addEventListener ('click', function () { vote ('down', this.parentNode) });
+        }
     
     // Bind onkeydown()/onkeyup() event to keys
     document.onkeydown = document.onkeyup = function(e) {