Issue 4795 - Use modern JavaScript syntax

stats.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-(function()
+"use strict";
+
 {
-  var backgroundPage = ext.backgroundPage.getWindow();
-  var require = backgroundPage.require;
-  var getBlockedPerPage = require("stats").getBlockedPerPage;
-  var FilterNotifier = require("filterNotifier").FilterNotifier;
-  var Prefs = require("prefs").Prefs;
+  const {require} = ext.backgroundPage.getWindow();
 
-  var currentPage;
-  var shareURL = "https://adblockplus.org/";
+  const {getBlockedPerPage} = require("stats");
+  const {FilterNotifier} = require("filterNotifier");
+  const {Prefs} = require("prefs");
 
-  var messageMark = {};
-  var shareLinks = {
+  let currentPage;
+  const shareURL = "https://adblockplus.org/";
+
+  let messageMark = {};
+  let shareLinks = {
     facebook: ["https://www.facebook.com/dialog/feed", {
       app_id: "475542399197328",
       link: shareURL,
       redirect_uri: "https://www.facebook.com/",
       ref: "adcounter",
       name: messageMark,
       actions: JSON.stringify([
         {
           name: i18n.getMessage("stats_share_download"),
           link: shareURL
         }
       ])
     }],
     gplus: ["https://plus.google.com/share", {
       url: shareURL
     }],
     twitter: ["https://twitter.com/intent/tweet", {
       text: messageMark,
       url: shareURL,
       via: "AdblockPlus"
     }]
   };
 
   function createShareLink(network, blockedCount)
   {
-    var url = shareLinks[network][0];
-    var params = shareLinks[network][1];
+    let url = shareLinks[network][0];
+    let params = shareLinks[network][1];
 
-    var querystring = [];
-    for (var key in params)
+    let querystring = [];
+    for (let key in params)
     {
-      var value = params[key];
+      let value = params[key];
       if (value == messageMark)
         value = i18n.getMessage("stats_share_message", blockedCount);
       querystring.push(encodeURIComponent(key) + "=" + encodeURIComponent(value));
     }
     return url + "?" + querystring.join("&");
   }
 
   function onLoad()
   {
     document.getElementById("share-box").addEventListener("click", share, false);
-    var showIconNumber = document.getElementById("show-iconnumber");
+    let showIconNumber = document.getElementById("show-iconnumber");
     showIconNumber.setAttribute("aria-checked", Prefs.show_statsinicon);
     showIconNumber.addEventListener("click", toggleIconNumber, false);
     document.querySelector("label[for='show-iconnumber']").addEventListener("click", toggleIconNumber, false);
 
     // Update stats
-    ext.pages.query({active: true, lastFocusedWindow: true}, function(pages)
+    ext.pages.query({active: true, lastFocusedWindow: true}, pages =>
     {
       currentPage = pages[0];
       updateStats();
 
       FilterNotifier.on("filter.hitCount", updateStats);
 
       document.getElementById("stats-container").removeAttribute("hidden");
     });
   }
 
   function onUnload()
   {
     FilterNotifier.off("filter.hitCount", updateStats);
   }
 
   function updateStats()
   {
-    var statsPage = document.getElementById("stats-page");
-    var blockedPage = getBlockedPerPage(currentPage).toLocaleString();
+    let statsPage = document.getElementById("stats-page");
+    let blockedPage = getBlockedPerPage(currentPage).toLocaleString();
     i18n.setElementText(statsPage, "stats_label_page", [blockedPage]);
 
-    var statsTotal = document.getElementById("stats-total");
-    var blockedTotal = Prefs.blocked_total.toLocaleString();
+    let statsTotal = document.getElementById("stats-total");
+    let blockedTotal = Prefs.blocked_total.toLocaleString();
     i18n.setElementText(statsTotal, "stats_label_total", [blockedTotal]);
   }
 
   function share(ev)
   {
     // Easter Egg
-    var blocked = Prefs.blocked_total;
+    let blocked = Prefs.blocked_total;
     if (blocked <= 9000 || blocked >= 10000)
       blocked = blocked.toLocaleString();
     else
       blocked = i18n.getMessage("stats_over", (9000).toLocaleString());
 
     ext.pages.open(createShareLink(ev.target.dataset.social, blocked));
   }
 
   function toggleIconNumber()
   {
     Prefs.show_statsinicon = !Prefs.show_statsinicon;
     document.getElementById("show-iconnumber").setAttribute("aria-checked", Prefs.show_statsinicon);
   }
 
   document.addEventListener("DOMContentLoaded", onLoad, false);
   window.addEventListener("unload", onUnload, false);
-})();
+}