Issue 6745 - Prefer strict equality operator

lib/filterListener.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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
@@ skipping 37 matching lines @@
   /**
    * Increases "dirty factor" of the filters and calls
    * FilterStorage.saveToDisk() if it becomes 1 or more. Save is
    * executed delayed to prevent multiple subsequent calls. If the
    * parameter is 0 it forces saving filters if any changes were
    * recorded after the previous save.
    * @param {number} factor
    */
   setDirty(factor)
   {
-    if (factor == 0 && isDirty > 0)
+    if (factor === 0 && isDirty > 0)
       isDirty = 1;
     else
       isDirty += factor;
     if (isDirty >= 1)
     {
       isDirty = 0;
       FilterStorage.saveToDisk();
     }
   }
 };
 
 /**
  * Observer listening to history purge actions.
  * @class
  */
 let HistoryPurgeObserver = {
   observe(subject, topic, data)
   {
-    if (topic == "browser:purge-session-history" &&
+    if (topic === "browser:purge-session-history" &&
         Prefs.clearStatsOnHistoryPurge)
     {
       FilterStorage.resetHitCounts();
       FilterListener.setDirty(0); // Force saving to disk
 
       Prefs.recentReports = [];
     }
   },
   QueryInterface: XPCOMUtils.generateQI(
     [Ci.nsISupportsWeakReference, Ci.nsIObserver]
@@ skipping 120 matching lines @@
   // it.
   let len = filters.length;
   if (!len)
     return;
 
   let current = (Math.random() * len) | 0;
   let step;
   do
   {
     step = primes[(Math.random() * primes.length) | 0];
-  } while (len % step == 0);
+  } while (len % step === 0);
 
   for (let i = 0; i < len; i++, current = (current + step) % len)
     addFilter(filters[current]);
 }
 
 function onSubscriptionAdded(subscription)
 {
   FilterListener.setDirty(1);
 
   if (!subscription.disabled)
     addFilters(subscription.filters);
 }
 
 function onSubscriptionRemoved(subscription)
 {
   FilterListener.setDirty(1);
 
   if (!subscription.disabled)
     subscription.filters.forEach(removeFilter);
 }
 
 function onSubscriptionDisabled(subscription, newValue)
 {
   FilterListener.setDirty(1);
 
   if (FilterStorage.knownSubscriptions.has(subscription.url))
   {
-    if (newValue == false)
+    if (newValue === false)
       addFilters(subscription.filters);
     else
       subscription.filters.forEach(removeFilter);
   }
 }
 
 function onSubscriptionUpdated(subscription)
 {
   FilterListener.setDirty(1);
 
   if (!subscription.disabled &&
       FilterStorage.knownSubscriptions.has(subscription.url))
   {
     subscription.oldFilters.forEach(removeFilter);
     addFilters(subscription.filters);
   }
 }
 
 function onFilterHitCount(filter, newValue)
 {
-  if (newValue == 0)
+  if (newValue === 0)
     FilterListener.setDirty(0);
   else
     FilterListener.setDirty(0.002);
 }
 
 function onFilterLastHit()
 {
   FilterListener.setDirty(0.002);
 }
 
@@ skipping 10 matching lines @@
   FilterListener.setDirty(1);
 
   if (!filter.disabled)
     removeFilter(filter);
 }
 
 function onFilterDisabled(filter, newValue)
 {
   FilterListener.setDirty(1);
 
-  if (newValue == false)
+  if (newValue === false)
     addFilter(filter);
   else
     removeFilter(filter);
 }
 
 function onGenericChange()
 {
   FilterListener.setDirty(1);
 }
 
 function onLoad()
 {
   isDirty = 0;
 
   defaultMatcher.clear();
   ElemHide.clear();
   ElemHideEmulation.clear();
   for (let subscription of FilterStorage.subscriptions)
   {
     if (!subscription.disabled)
       addFilters(subscription.filters);
   }
 }
 
 function onSave()
 {
   isDirty = 0;
 }