Safer property access.

src/Archive/Redirect.coffee

@@ -15,11 +15,11 @@ Redirect =
 
   selectArchives: ->
     o =
-      thread: {}
+      thread: $.dict()
-      post:   {}
+      post:   $.dict()
-      file:   {}
+      file:   $.dict()
 
-    archives = {}
+    archives = $.dict()
     for data in Conf['archives']
       for key in ['boards', 'files']
         data[key] = [] unless data[key] instanceof Array
@@ -32,7 +32,7 @@ Redirect =
         o.file[boardID]   = data unless boardID of o.file   or boardID  not in files
 
     for boardID, record of Conf['selectedArchives']
-      for type, id of record when (archive = archives[JSON.stringify id])
+      for type, id of record when (archive = archives[JSON.stringify id]) and $.hasOwn(o, type)
         boards = if type is 'file' then archive.files else archive.boards
         o[type][boardID] = archive if boardID in boards
 
@@ -76,14 +76,14 @@ Redirect =
 
   parse: (responses, cb) ->
     archives = []
-    archiveUIDs = {}
+    archiveUIDs = $.dict()
     for response in responses
       for data in response
         uid = JSON.stringify(data.uid ? data.name)
         if uid of archiveUIDs
           $.extend archiveUIDs[uid], data
         else
-          archiveUIDs[uid] = data
+          archiveUIDs[uid] = $.dict.clone data
           archives.push data
     items = {archives, lastarchivecheck: Date.now()}
     $.set items
@@ -98,7 +98,7 @@ Redirect =
 
   protocol: (archive) ->
     protocol = location.protocol
-    unless archive[protocol[0...-1]]
+    unless $.getOwn(archive, protocol[0...-1])
       protocol = if protocol is 'https:' then 'http:' else 'https:'
     "#{protocol}//"
 
@@ -146,10 +146,10 @@ Redirect =
       type
     if type is 'capcode'
       # https://github.com/pleebe/FoolFuuka/blob/bf4224eed04637a4d0bd4411c2bf5f9945dfec0b/src/Model/Search.php#L363
-      value = {
+      value = $.getOwn({
         'Developer': 'dev'
         'Verified':  'ver'
-      }[value] or value.toLowerCase()
+      }, value) or value.toLowerCase()
     else if type is 'image'
       value = value.replace /[+/=]/g, (c) -> ({'+': '-', '/': '_', '=': ''})[c]
     value = encodeURIComponent value

src/Filtering/Filter.coffee

@@ -1,6 +1,6 @@
 Filter =
-  filters: {}
+  filters: $.dict()
-  results: {}
+  results: $.dict()
   init: ->
     return unless g.VIEW in ['index', 'thread', 'catalog'] and Conf['Filter']
     return if g.VIEW is 'catalog' and not Conf['Filter in Native Catalog']
@@ -44,11 +44,11 @@ Filter =
 
         # Filter OPs along with their threads or replies only.
         op = filter.match(/(?:^|;)\s*op:(no|only)/)?[1] or ''
-        mask = {'no': 1, 'only': 2}[op] or 0
+        mask = $.getOwn({'no': 1, 'only': 2}, op) or 0
 
         # Filter only posts with/without files.
         file = filter.match(/(?:^|;)\s*file:(no|only)/)?[1] or ''
-        mask = mask | ({'no': 4, 'only': 8}[file] or 0)
+        mask = mask | ($.getOwn({'no': 4, 'only': 8}, file) or 0)
 
         # Overrule the `Show Stubs` setting.
         # Defaults to stub showing.
@@ -102,7 +102,7 @@ Filter =
   parseBoards: (boardsRaw) ->
     return false unless boardsRaw
     return boards if (boards = Filter.parseBoardsMemo[boardsRaw])
-    boards = {}
+    boards = $.dict()
     siteFilter = ''
     for boardID in boardsRaw.split(',')
       if ':' in boardID
@@ -116,7 +116,7 @@ Filter =
     Filter.parseBoardsMemo[boardsRaw] = boards
     boards
 
-  parseBoardsMemo: {}
+  parseBoardsMemo: $.dict()
 
   test: (post, hideable=true) ->
     return post.filterResults if post.filterResults
@@ -172,7 +172,7 @@ Filter =
 
   catalog: ->
     return unless (url = g.SITE.urls.catalogJSON?(g.BOARD))
-    Filter.catalogData = {}
+    Filter.catalogData = $.dict()
     $.ajax url,
       onloadend: Filter.catalogParse
     Callbacks.CatalogThreadNative.push
@@ -225,17 +225,18 @@ Filter =
     MD5:        (post) -> post.files.map((f) -> f.MD5)
 
   values: (key, post) ->
-    if key of Filter.valueF
+    if $.hasOwn(Filter.valueF, key)
       Filter.valueF[key](post).filter((v) -> v?)
     else
       [key.split('+').map((k) ->
-        if (f=Filter.valueF[k])
+        if (f = $.getOwn(Filter.valueF, k))
           f(post).map((v) -> v or '').join('\n')
         else
           ''
       ).join('\n')]
 
   addFilter: (type, re, cb) ->
+    return unless $.hasOwn(Config.filter, type)
     $.get type, Conf[type], (item) ->
       save = item[type]
       # Add a new line before the regexp unless the text is empty.

src/Filtering/Recursive.coffee

@@ -1,5 +1,5 @@
 Recursive =
-  recursives: {}
+  recursives: $.dict()
   init: ->
     return unless g.VIEW in ['index', 'thread']
     Callbacks.Post.push

src/Filtering/ThreadHiding.coffee

@@ -15,7 +15,7 @@ ThreadHiding =
     return unless $.hasStorage and g.SITE.software is 'yotsuba'
     hiddenThreads = ThreadHiding.db.get
       boardID: board.ID
-      defaultValue: {}
+      defaultValue: $.dict()
     hiddenThreads[threadID] = true for threadID of hiddenThreads
     localStorage.setItem "4chan-hide-t-#{board}", JSON.stringify hiddenThreads
 
@@ -32,12 +32,12 @@ ThreadHiding =
 
   catalogSave: ->
     hiddenThreads2 = JSON.parse(localStorage.getItem "4chan-hide-t-#{g.BOARD}") or {}
-    for threadID of hiddenThreads2 when !(threadID of ThreadHiding.hiddenThreads)
+    for threadID of hiddenThreads2 when !$.hasOwn(ThreadHiding.hiddenThreads, threadID)
       ThreadHiding.db.set
         boardID:  g.BOARD.ID
         threadID: threadID
         val:      {makeStub: Conf['Stubs']}
-    for threadID of ThreadHiding.hiddenThreads when !(threadID of hiddenThreads2)
+    for threadID of ThreadHiding.hiddenThreads when !$.hasOwn(hiddenThreads2, threadID)
       ThreadHiding.db.delete
         boardID:  g.BOARD.ID
         threadID: threadID
@@ -176,7 +176,7 @@ ThreadHiding =
 
   toggle: (thread) ->
     unless thread instanceof Thread
-      thread = g.threads[@dataset.fullID]
+      thread = g.threads.get(@dataset.fullID)
     if thread.isHidden
       ThreadHiding.show thread
     else

src/General/BoardConfig.coffee

@@ -13,7 +13,7 @@ BoardConfig =
 
   load: ->
     if @status is 200 and @response and @response.boards
-      boards = {}
+      boards = $.dict()
       for board in @response.boards
         boards[board.board] = board
       {troll_flags} = @response

src/General/Get.coffee

@@ -13,14 +13,14 @@ Get =
   threadFromRoot: (root) ->
     return null unless root?
     {board} = root.dataset
-    g.threads["#{if board then encodeURIComponent(board) else g.BOARD.ID}.#{root.id.match(/\d*$/)[0]}"]
+    g.threads.get("#{if board then encodeURIComponent(board) else g.BOARD.ID}.#{root.id.match(/\d*$/)[0]}")
   threadFromNode: (node) ->
     Get.threadFromRoot $.x "ancestor-or-self::#{g.SITE.xpath.thread}", node
   postFromRoot: (root) ->
     return null unless root?
-    post  = g.posts[root.dataset.fullID]
+    post  = g.posts.get(root.dataset.fullID)
     index = root.dataset.clone
-    if index then post.clones[index] else post
+    if index then post.clones[+index] else post
   postFromNode: (root) ->
     Get.postFromRoot $.x "ancestor-or-self::#{g.SITE.xpath.postContainer}[1]", root
   postDataFromLink: (link) ->
@@ -59,7 +59,7 @@ Get =
     #   and their clones,
     #   get all of their backlinks.
     if Conf['Quote Backlinks']
-      handleQuotes qPost, 'backlinks' for quote in post.quotes when qPost = posts[quote]
+      handleQuotes qPost, 'backlinks' for quote in post.quotes when qPost = posts.get(quote)
 
     # Third:
     #   Filter out irrelevant quotelinks.

src/General/Index.coffee

@@ -52,7 +52,7 @@ Index =
 
     # Header "Index Navigation" submenu
     entries = []
-    @inputs = inputs = {}
+    @inputs = inputs = $.dict()
     for name, arr of Config.Index when arr instanceof Array
       label = UI.checkbox name, "#{name[0]}#{name[1..].toLowerCase()}"
       label.title = arr[1]
@@ -66,7 +66,7 @@ Index =
     $.on inputs['Anchor Hidden Threads'], 'change', @cb.resort
 
     watchSettings = (e) ->
-      if (input = inputs[e.target.name])
+      if (input = $.getOwn(inputs, e.target.name))
         input.checked = e.target.checked
         $.event 'change', null, input
     $.on d, 'OpenSettings', ->
@@ -283,10 +283,10 @@ Index =
       Index.pageLoad false unless e?.detail?.deferred
 
     perBoardSort: ->
-      Conf['Index Sort'] = if @checked then {} else ''
+      Conf['Index Sort'] = if @checked then $.dict() else ''
       Index.saveSort()
       for i in [0...2]
-        Conf["Last Long Reply Thresholds #{i}"] = if @checked then {} else ''
+        Conf["Last Long Reply Thresholds #{i}"] = if @checked then $.dict() else ''
         Index.saveLastLongThresholds i
       return
 
@@ -412,12 +412,12 @@ Index =
     commands = hash[1..].split '/'
     leftover = []
     for command in commands
-      if (mode = Index.hashCommands.mode[command])
+      if (mode = $.getOwn(Index.hashCommands.mode, command))
         state.mode = mode
       else if command is 'index'
         state.mode = Conf['Previous Index Mode']
         state.page = 1
-      else if (sort = Index.hashCommands.sort[command.replace(/-rev$/, '')])
+      else if (sort = $.getOwn(Index.hashCommands.sort, command.replace(/-rev$/, '')))
         state.sort = sort
         state.sort += '-rev' if /-rev$/.test(command)
       else if /^s=/.test command
@@ -659,10 +659,10 @@ Index =
     Index.threadsNumPerPage = pages[0]?.threads.length or 1
     Index.liveThreadData    = pages.reduce ((arr, next) -> arr.concat next.threads), []
     Index.liveThreadIDs     = Index.liveThreadData.map (data) -> data.no
-    Index.liveThreadDict    = {}
+    Index.liveThreadDict    = $.dict()
-    Index.threadPosition    = {}
+    Index.threadPosition    = $.dict()
-    Index.parsedThreads     = {}
+    Index.parsedThreads     = $.dict()
-    Index.replyData         = {}
+    Index.replyData         = $.dict()
     for data, i in Index.liveThreadData
       Index.liveThreadDict[data.no] = data
       Index.threadPosition[data.no] = i
@@ -682,7 +682,7 @@ Index =
     return
 
   isHidden: (threadID) ->
-    if (thread = g.BOARD.threads[threadID]) and thread.OP and not thread.OP.isFetchedQuote
+    if (thread = g.BOARD.threads.get(threadID)) and thread.OP and not thread.OP.isFetchedQuote
       thread.isHidden
     else
       Index.parsedThreads[threadID].isHidden
@@ -698,7 +698,7 @@ Index =
       try
         threadData = Index.liveThreadDict[ID]
 
-        if (thread = g.BOARD.threads[ID])
+        if (thread = g.BOARD.threads.get(ID))
           isStale = (thread.json isnt threadData) and (JSON.stringify(thread.json) isnt JSON.stringify(threadData))
           if isStale
             thread.setCount 'post', threadData.replies + 1,                threadData.bumplimit
@@ -751,7 +751,7 @@ Index =
       continue if not (lastReplies = Index.liveThreadDict[thread.ID].last_replies)
       nodes = []
       for data in lastReplies
-        if (post = thread.posts[data.no]) and not post.isFetchedQuote
+        if (post = thread.posts.get(data.no)) and not post.isFetchedQuote
           nodes.push post.nodes.root
           continue
         nodes.push node = g.SITE.Build.postFromObject data, thread.board.ID
@@ -822,7 +822,7 @@ Index =
             if len >= Index.lastLongThresholds[+!!r.ext]
               return r
           if thread.omitted_posts then thread.last_replies[0] else thread
-        lastlongD = {}
+        lastlongD = $.dict()
         for thread in liveThreadData
           lastlongD[thread.no] = lastlong(thread).no
         [liveThreadData...].sort((a, b) ->

src/General/Settings.coffee

@@ -129,8 +129,8 @@ Settings =
       warning addWarning
     $.add section, warnings
 
-    items  = {}
+    items  = $.dict()
-    inputs = {}
+    inputs = $.dict()
     addCheckboxes = (root, obj) ->
       containers = [root]
       for key, arr of obj when arr instanceof Array
@@ -177,7 +177,7 @@ Settings =
     div = $.el 'div',
       <%= html('<button></button><span class="description">: Clear manually-hidden threads and posts on all boards. Reload the page to apply.') %>
     button = $ 'button', div
-    $.get {hiddenThreads: {}, hiddenPosts: {}}, ({hiddenThreads, hiddenPosts}) ->
+    $.get {hiddenThreads: $.dict(), hiddenPosts: $.dict()}, ({hiddenThreads, hiddenPosts}) ->
       hiddenNum = 0
       for ID, site of hiddenThreads when ID isnt 'boards'
         for ID, board of site.boards
@@ -194,7 +194,7 @@ Settings =
       button.textContent = "Hidden: #{hiddenNum}"
     $.on button, 'click', ->
       @textContent = 'Hidden: 0'
-      $.get 'hiddenThreads', {}, ({hiddenThreads}) ->
+      $.get 'hiddenThreads', $.dict(), ({hiddenThreads}) ->
         if $.hasStorage and g.SITE.software is 'yotsuba'
           for boardID of hiddenThreads.boards
             localStorage.removeItem "4chan-hide-t-#{boardID}"
@@ -203,7 +203,7 @@ Settings =
 
   export: ->
     # Make sure to export the most recent data, but don't overwrite existing `Conf` object.
-    Conf2 = {}
+    Conf2 = $.dict()
     $.extend Conf2, Conf
     $.get Conf2, (Conf2) ->
       # Don't export cached JSON data.
@@ -235,7 +235,7 @@ Settings =
     reader = new FileReader()
     reader.onload = (e) ->
       try
-        Settings.loadSettings JSON.parse(e.target.result), (err) ->
+        Settings.loadSettings $.dict.json(e.target.result), (err) ->
           if err
             output.textContent = 'Import failed due to an error.'
           else if confirm 'Import successful. Reload now?'
@@ -327,14 +327,14 @@ Settings =
         data.Conf[key] = data.Conf[key].replace(/ctrl|alt|meta/g, (s) -> "#{s[0].toUpperCase()}#{s[1..]}").replace /(^|.+\+)[A-Z]$/g, (s) ->
           "Shift+#{s[0...-1]}#{s[-1..].toLowerCase()}"
       if data.WatchedThreads
-        data.Conf['watchedThreads'] = boards: {}
+        data.Conf['watchedThreads'] = boards: $.dict()
         for boardID, threads of data.WatchedThreads
           for threadID, threadData of threads
-            (data.Conf['watchedThreads'].boards[boardID] or= {})[threadID] = excerpt: threadData.textContent
+            (data.Conf['watchedThreads'].boards[boardID] or= $.dict())[threadID] = excerpt: threadData.textContent
       data
 
   upgrade: (data, version) ->
-    changes = {}
+    changes = $.dict()
     set = (key, value) ->
       data[key] = changes[key] = value
     setD = (key, value) ->
@@ -371,7 +371,7 @@ Settings =
       if data['selectedArchives']?
         uids = {"Moe":0,"4plebs Archive":3,"Nyafuu Archive":4,"Love is Over":5,"Rebecca Black Tech":8,"warosu":10,"fgts":15,"not4plebs":22,"DesuStorage":23,"fireden.net":24,"disabled":null}
         for boardID, record of data['selectedArchives']
-          for type, name of record when name of uids
+          for type, name of record when $.hasOwn(uids, name)
             record[type] = uids[name]
         set 'selectedArchives', data['selectedArchives']
     if compareString < '00001.00011.00016.00000'
@@ -468,7 +468,7 @@ Settings =
           delete data[db].lastChecked
           set db, data[db]
       if data['siteSoftware']? and not data['siteProperties']?
-        siteProperties = {}
+        siteProperties = $.dict()
         for line in data['siteSoftware'].split('\n')
           [hostname, software] = line.split(' ')
           siteProperties[hostname] = {software}
@@ -523,6 +523,7 @@ Settings =
   selectFilter: ->
     div = @nextElementSibling
     if (name = @value) isnt 'guide'
+      return unless $.hasOwn(Config.filter, name)
       $.rmAll div
       ta = $.el 'textarea',
         name: name
@@ -551,7 +552,7 @@ Settings =
     $.extend section, <%= readHTML('Advanced.html') %>
     warning.hidden = Conf[warning.dataset.feature] for warning in $$ '.warning', section
 
-    inputs = {}
+    inputs = $.dict()
     for input in $$ '[name]', section
       inputs[input.name] = input
 
@@ -560,7 +561,7 @@ Settings =
       Conf['lastarchivecheck'] = 0
       $.id('lastarchivecheck').textContent = 'never'
 
-    items = {}
+    items = $.dict()
     for name, input of inputs when name not in ['captchaServiceKey', 'Interval', 'Custom CSS']
       items[name] = Conf[name]
       event = if (
@@ -602,7 +603,7 @@ Settings =
     $.on customCSS, 'change', Settings.togglecss
     $.on applyCSS,  'click',  -> CustomCSS.update()
 
-    itemsArchive = {}
+    itemsArchive = $.dict()
     itemsArchive[name] = Conf[name] for name in ['archives', 'selectedArchives', 'lastarchivecheck']
     $.get itemsArchive, (itemsArchive) ->
       $.extend Conf, itemsArchive
@@ -634,7 +635,7 @@ Settings =
     $.rmAll boardSelect
     $.rmAll tbody
 
-    archBoards = {}
+    archBoards = $.dict()
     for {uid, name, boards, files, software} in Conf['archives']
       continue unless software in ['fuuka', 'foolfuuka']
       for boardID in boards
@@ -715,7 +716,7 @@ Settings =
 
   saveSelectedArchive: ->
     $.get 'selectedArchives', Conf['selectedArchives'], ({selectedArchives}) =>
-      (selectedArchives[@dataset.boardid] or= {})[@dataset.type] = JSON.parse @value
+      (selectedArchives[@dataset.boardid] or= $.dict())[@dataset.type] = JSON.parse @value
       $.set 'selectedArchives', selectedArchives
       Conf['selectedArchives'] = selectedArchives
       Redirect.selectArchives()
@@ -732,7 +733,7 @@ Settings =
     Conf['captchaServiceKey'][domain] = value
     $.get 'captchaServiceKey', Conf['captchaServiceKey'], ({captchaServiceKey}) ->
       captchaServiceKey[domain] = value
-      delete captchaServiceKey[domain] unless value or (domain of Config['captchaServiceKey'][0])
+      delete captchaServiceKey[domain] unless value or $.hasOwn(Config['captchaServiceKey'][0], domain)
       Conf['captchaServiceKey'] = captchaServiceKey
       $.set 'captchaServiceKey', captchaServiceKey
       Settings.captchaServiceDomainList()
@@ -794,8 +795,8 @@ Settings =
     $('.warning', section).hidden = Conf['Keybinds']
 
     tbody  = $ 'tbody', section
-    items  = {}
+    items  = $.dict()
-    inputs = {}
+    inputs = $.dict()
     for key, arr of Config.hotkeys
       tr = $.el 'tr',
         <%= html('<td>${arr[1]}</td><td><input class="field"></td>') %>

src/General/Test.coffee

@@ -127,7 +127,7 @@ Test =
 
   cb:
     testOne: ->
-      Test.testOne g.posts[@dataset.fullID]
+      Test.testOne g.posts.get(@dataset.fullID)
       Menu.menu.close()
 
     testAll: ->

src/Images/FappeTyme.coffee

@@ -25,7 +25,7 @@ FappeTyme =
         textContent: type[0]
         title: "#{type} Tyme active"
       $.on indicator, 'click', ->
-        check = FappeTyme.nodes[@parentNode.id.replace('shortcut-', '')]
+        check = $.getOwn(FappeTyme.nodes, @parentNode.id.replace('shortcut-', ''))
         check.checked = !check.checked
         $.event 'change', null, check
       Header.addShortcut lc, indicator, 410

src/Images/Gallery.coffee

@@ -38,7 +38,7 @@ Gallery =
 
     Gallery.images  = []
     nodes = Gallery.nodes = {}
-    Gallery.fileIDs = {}
+    Gallery.fileIDs = $.dict()
     Gallery.slideshow = false
 
     nodes.el = dialog = $.el 'div',
@@ -133,7 +133,7 @@ Gallery =
 
   load: (thumb, errorCB) ->
     ext = thumb.href.match /\w*$/
-    elType = {'webm': 'video', 'mp4': 'video', 'pdf': 'iframe'}[ext] or 'img'
+    elType = $.getOwn({'webm': 'video', 'mp4': 'video', 'pdf': 'iframe'}, ext) or 'img'
     file = $.el elType
     $.extend file.dataset, thumb.dataset
     $.on file, 'error', errorCB
@@ -185,7 +185,7 @@ Gallery =
       Gallery.cb.stop()
 
     # Scroll to post
-    if Conf['Scroll to Post'] and (post = g.posts[file.dataset.post])
+    if Conf['Scroll to Post'] and (post = g.posts.get(file.dataset.post))
       Header.scrollTo post.nodes.root
 
     # Preload next image
@@ -196,11 +196,11 @@ Gallery =
     if @error?.code is MediaError.MEDIA_ERR_DECODE
       return new Notice 'error', 'Corrupt or unplayable video', 30
     return if ImageCommon.isFromArchive @
-    post = g.posts[@dataset.post]
+    post = g.posts.get(@dataset.post)
-    file = post.files[@dataset.file]
+    file = post.files[+@dataset.file]
     ImageCommon.error @, post, file, null, (url) =>
       return unless url
-      Gallery.images[@dataset.id].href = url
+      Gallery.images[+@dataset.id].href = url
       (@src = url if Gallery.nodes.current is @)
 
   cacheError: ->
@@ -341,7 +341,7 @@ Gallery =
       {current, frame} = Gallery.nodes
       {style} = current
 
-      if Conf['Stretch to Fit'] and (dim = g.posts[current.dataset.post]?.file.dimensions)
+      if Conf['Stretch to Fit'] and (dim = g.posts.get(current.dataset.post)?.file.dimensions)
         [width, height] = dim.split 'x'
         containerWidth = frame.clientWidth
         containerHeight = doc.clientHeight - 25

src/Images/Metadata.coffee

@@ -24,7 +24,7 @@ Metadata =
     $.rmClass @parentNode, 'error'
     $.addClass @parentNode, 'loading'
     {index} = @parentNode.dataset
-    CrossOrigin.binary Get.postFromNode(@).files[index].url, (data) =>
+    CrossOrigin.binary Get.postFromNode(@).files[+index].url, (data) =>
       $.rmClass @parentNode, 'loading'
       if data?
         title = Metadata.parse data

src/Images/Sauce.coffee

@@ -18,7 +18,7 @@ Sauce =
 
   parseLink: (link) ->
     return null if not (link = link.trim())
-    parts = {}
+    parts = $.dict()
     for part, i in link.split /;(?=(?:text|boards|types|regexp|sandbox):?)/
       if i is 0
         parts['url'] = part
@@ -47,7 +47,7 @@ Sauce =
 
   createSauceLink: (link, post, file) ->
     ext = file.url.match(/[^.]*$/)[0]
-    parts = {}
+    parts = $.dict()
     $.extend parts, link
 
     return null unless !parts['boards'] or parts['boards']["#{post.siteID}/#{post.boardID}"] or parts['boards']["#{post.siteID}/*"]

src/Linkification/Embedding.coffee

@@ -1,7 +1,7 @@
 Embedding =
   init: ->
     return unless g.VIEW in ['index', 'thread', 'archive'] and Conf['Linkify'] and (Conf['Embedding'] or Conf['Link Title'] or Conf['Cover Preview'])
-    @types = {}
+    @types = $.dict()
     @types[type.key] = type for type in @ordered_types
 
     if Conf['Embedding'] and g.VIEW isnt 'archive'

src/Menu/DeleteLink.coffee

@@ -1,5 +1,5 @@
 DeleteLink =
-  auto: [{}, {}]
+  auto: [$.dict(), $.dict()]
 
   init: ->
     return unless g.VIEW in ['index', 'thread'] and Conf['Menu'] and Conf['Delete Link']
@@ -77,7 +77,7 @@ DeleteLink =
       mode: 'usrdel'
       onlyimgdel: fileOnly
       pwd: QR.persona.getPassword()
-    form[post.ID] = 'delete'
+    form[+post.ID] = 'delete'
 
     $.ajax $.id('delform').action.replace("/#{g.BOARD}/", "/#{post.board}/"),
       responseType: 'document'
@@ -110,7 +110,7 @@ DeleteLink =
       link.textContent = 'Deleted' if post.fullID is DeleteLink.post.fullID
 
   cooldown:
-    seconds: {}
+    seconds: $.dict()
 
     start: (post, seconds) ->
       # Already counting.

src/Miscellaneous/Banner.coffee

@@ -75,7 +75,7 @@ Banner =
           boardID:  g.BOARD.ID
           threadID: @className
 
-  original: {}
+  original: $.dict()
 
   custom: (child) ->
     {className} = child

src/Miscellaneous/CatalogLinks.coffee

@@ -81,12 +81,12 @@ CatalogLinks =
     return
 
   externalParse: ->
-    CatalogLinks.externalList = {}
+    CatalogLinks.externalList = $.dict()
     for line in Conf['externalCatalogURLs'].split '\n'
       continue if line[0] is '#'
       url = line.split(';')[0]
       boards   = Filter.parseBoards(line.match(/;boards:([^;]+)/)?[1] or '*')
-      excludes = Filter.parseBoards(line.match(/;exclude:([^;]+)/)?[1]) or {}
+      excludes = Filter.parseBoards(line.match(/;exclude:([^;]+)/)?[1]) or $.dict()
       for board of boards
         unless excludes[board] or excludes[board.split('/')[0] + '/*']
           CatalogLinks.externalList[board] = url

src/Miscellaneous/ExpandThread.coffee

@@ -1,5 +1,5 @@
 ExpandThread =
-  statuses: {}
+  statuses: $.dict()
   init: ->
     return if not (g.VIEW is 'index' and Conf['Thread Expansion'])
     if Conf['JSON Index']
@@ -96,7 +96,7 @@ ExpandThread =
     filesCount = 0
     for postData in req.response.posts
       continue if postData.no is thread.ID
-      if (post = thread.posts[postData.no]) and not post.isFetchedQuote
+      if (post = thread.posts.get(postData.no)) and not post.isFetchedQuote
         filesCount++ if 'file' of post
         {root} = post.nodes
         postsRoot.push root

src/Miscellaneous/FileInfo.coffee

@@ -26,7 +26,7 @@ FileInfo =
   format: (formatString, post, outputNode) ->
     output = []
     formatString.replace /%(.)|[^%]+/g, (s, c) ->
-      output.push if c of FileInfo.formatters
+      output.push if $.hasOwn(FileInfo.formatters, c)
         FileInfo.formatters[c].call post
       else
         <%= html('${s}') %>

src/Miscellaneous/Fourchan.coffee

@@ -7,8 +7,8 @@ Fourchan =
   initBoard: ->
     if g.BOARD.config.code_tags
       $.on window, 'prettyprint:cb', (e) ->
-        return if not (post = g.posts[e.detail.ID])
+        return if not (post = g.posts.get(e.detail.ID))
-        return if not (pre  = $$('.prettyprint', post.nodes.comment)[e.detail.i])
+        return if not (pre  = $$('.prettyprint', post.nodes.comment)[+e.detail.i])
         unless $.hasClass pre, 'prettyprinted'
           pre.innerHTML = e.detail.html
           $.addClass pre, 'prettyprinted'

src/Miscellaneous/IDColor.coffee

@@ -1,9 +1,8 @@
 IDColor =
   init: ->
     return unless g.VIEW in ['index', 'thread'] and Conf['Color User IDs']
-    @ids = {
+    @ids = $.dict()
-      Heaven: [0, 0, 0, '#fff']
+    @ids['Heaven'] = [0, 0, 0, '#fff']
-    }
 
     Callbacks.Post.push
       name: 'Color User IDs'

src/Miscellaneous/ModContact.coffee

@@ -6,11 +6,11 @@ ModContact =
       cb:   @node
 
   node: ->
-    return if @isClone or !ModContact.specific[@info.capcode]
+    return if @isClone or !$.hasOwn(ModContact.specific, @info.capcode)
     links = $.el 'span', className: 'contact-links brackets-wrap'
     $.extend links, ModContact.template(@info.capcode)
     $.after @nodes.capcode, links
-    if (moved = @info.comment.match /This thread was moved to >>>\/(\w+)\//) and ModContact.moveNote[moved[1]]
+    if (moved = @info.comment.match /This thread was moved to >>>\/(\w+)\//) and $.hasOwn(ModContact.moveNote, moved[1])
       moveNote = $.el 'div', className: 'move-note'
       $.extend moveNote, ModContact.moveNote[moved[1]]
       $.add @nodes.post, moveNote

src/Miscellaneous/Nav.coffee

@@ -39,7 +39,7 @@ Nav =
       Nav.scroll +1
 
   getThread: ->
-    return g.threads["#{g.BOARD}.#{g.THREADID}"].nodes.root if g.VIEW is 'thread'
+    return g.threads.get("#{g.BOARD}.#{g.THREADID}").nodes.root if g.VIEW is 'thread'
     return if $.hasClass doc, 'catalog-mode'
     for threadRoot in $$ g.SITE.selectors.thread
       thread = Get.threadFromRoot threadRoot

src/Miscellaneous/RelativeDates.coffee

@@ -126,6 +126,6 @@ RelativeDates =
 
   markStale: (data) ->
     return if data in RelativeDates.stale # We can call RelativeDates.update() multiple times.
-    return if data instanceof Post and !g.posts[data.fullID] # collected post.
+    return if data instanceof Post and !g.posts.get(data.fullID) # collected post.
     return if data instanceof Element and !doc.contains(data) # removed catalog reply.
     RelativeDates.stale.push data

src/Miscellaneous/Time.coffee

@@ -13,7 +13,7 @@ Time =
 
   format: (formatString, date) ->
     formatString.replace /%(.)/g, (s, c) ->
-      if c of Time.formatters
+      if $.hasOwn(Time.formatters, c)
         Time.formatters[c].call(date)
       else
         s

src/Monitoring/Favicon.coffee

@@ -59,7 +59,8 @@ Favicon =
         '<%= readBase64('Metro.unreadNSFW.png') %>'
         '<%= readBase64('Metro.unreadNSFWY.png') %>'
       ]
-    }[Conf['favicon']]
+    }
+    items = $.getOwn(items, Conf['favicon'])
 
     f = Favicon
     t = 'data:image/png;base64,'

src/Monitoring/MarkNewIPs.coffee

@@ -18,10 +18,10 @@ MarkNewIPs =
       when postCount - MarkNewIPs.postCount + deletedPosts.length
         i = MarkNewIPs.ipCount
         for fullID in newPosts
-          MarkNewIPs.markNew g.posts[fullID], ++i
+          MarkNewIPs.markNew g.posts.get(fullID), ++i
       when -deletedPosts.length
         for fullID in newPosts
-          MarkNewIPs.markOld g.posts[fullID]
+          MarkNewIPs.markOld g.posts.get(fullID)
     MarkNewIPs.ipCount = ipCount
     MarkNewIPs.postCount = postCount
 

src/Monitoring/ReplyPruning.coffee

@@ -88,7 +88,7 @@ ReplyPruning =
     return if e.detail[404]
     for fullID in e.detail.newPosts
       ReplyPruning.total++
-      ReplyPruning.totalFiles++ if g.posts[fullID].file
+      ReplyPruning.totalFiles++ if g.posts.get(fullID).file
     return
 
   update: ->
@@ -105,7 +105,7 @@ ReplyPruning =
 
     if ReplyPruning.hidden < hidden2
       while ReplyPruning.hidden < hidden2 and ReplyPruning.position < posts.keys.length
-        post = posts[posts.keys[ReplyPruning.position++]]
+        post = posts.get(posts.keys[ReplyPruning.position++])
         if post.isReply and not post.isFetchedQuote
           $.add ReplyPruning.container, node while (node = ReplyPruning.summary.nextSibling) and node isnt post.nodes.root
           $.add ReplyPruning.container, post.nodes.root
@@ -115,7 +115,7 @@ ReplyPruning =
     else if ReplyPruning.hidden > hidden2
       frag = $.frag()
       while ReplyPruning.hidden > hidden2 and ReplyPruning.position > 0
-        post = posts[posts.keys[--ReplyPruning.position]]
+        post = posts.get(posts.keys[--ReplyPruning.position])
         if post.isReply and not post.isFetchedQuote
           $.prepend frag, node while (node = ReplyPruning.container.lastChild) and node isnt post.nodes.root
           $.prepend frag, post.nodes.root

src/Monitoring/ThreadStats.coffee

@@ -55,7 +55,7 @@ ThreadStats =
     {posts} = ThreadStats.thread
     n = posts.keys.length
     for i in [ThreadStats.postIndex...n] by 1
-      post = posts[posts.keys[i]]
+      post = posts.get(posts.keys[i])
       unless post.isFetchedQuote
         ThreadStats.postCount++
         ThreadStats.fileCount += post.files.length
@@ -132,7 +132,7 @@ ThreadStats =
       ThreadStats.showPage and
       ThreadStats.pageCountEl.textContent isnt '1' and
       !g.SITE.threadModTimeIgnoresSage and
-      ThreadStats.thread.posts[ThreadStats.thread.lastPost].info.date > ThreadStats.lastPageUpdate
+      ThreadStats.thread.posts.get(ThreadStats.thread.lastPost).info.date > ThreadStats.lastPageUpdate
     )
     clearTimeout ThreadStats.timeout
     ThreadStats.timeout = setTimeout ThreadStats.fetchPage, 5 * $.SECOND

src/Monitoring/ThreadUpdater.coffee

@@ -266,7 +266,7 @@ ThreadUpdater =
 
     # XXX Reject updates that falsely delete the last post.
     return if postObjects[postObjects.length-1].no < lastPost and
-      new Date(req.getResponseHeader('Last-Modified')) - thread.posts[lastPost].info.date < 30 * $.SECOND
+      new Date(req.getResponseHeader('Last-Modified')) - thread.posts.get(lastPost).info.date < 30 * $.SECOND
 
     g.SITE.Build.spoilerRange[board] = OP.custom_spoiler
     thread.setStatus 'Archived', !!OP.archived
@@ -291,7 +291,7 @@ ThreadUpdater =
       continue if ID <= lastPost
 
       # XXX Resurrect wrongly deleted posts.
-      if (post = thread.posts[ID]) and not post.isFetchedQuote
+      if (post = thread.posts.get(ID)) and not post.isFetchedQuote
         post.resurrect()
         continue
 
@@ -304,14 +304,14 @@ ThreadUpdater =
     # Check for deleted posts.
     deletedPosts = []
     for ID in ThreadUpdater.postIDs when ID not in index
-      thread.posts[ID].kill()
+      thread.posts.get(ID).kill()
       deletedPosts.push "#{board}.#{ID}"
     ThreadUpdater.postIDs = index
 
     # Check for deleted files.
     deletedFiles = []
     for ID in ThreadUpdater.fileIDs when not (ID in files or "#{board}.#{ID}" in deletedPosts)
-      thread.posts[ID].kill true
+      thread.posts.get(ID).kill true
       deletedFiles.push "#{board}.#{ID}"
     ThreadUpdater.fileIDs = files
 

src/Monitoring/ThreadWatcher.coffee

@@ -150,7 +150,7 @@ ThreadWatcher =
         if Conf['Auto Watch']
           ThreadWatcher.addRaw boardID, threadID, {}, cb
       else if Conf['Auto Watch Reply']
-        ThreadWatcher.add (g.threads[boardID + '.' + threadID] or new Thread(threadID, g.boards[boardID] or new Board(boardID))), cb
+        ThreadWatcher.add (g.threads.get(boardID + '.' + threadID) or new Thread(threadID, g.boards[boardID] or new Board(boardID))), cb
     onIndexUpdate: (e) ->
       {db}    = ThreadWatcher
       siteID  = g.SITE.ID
@@ -169,7 +169,7 @@ ThreadWatcher =
           nKilled++
       ThreadWatcher.refresh() if nKilled
     onThreadRefresh: (e) ->
-      thread = g.threads[e.detail.threadID]
+      thread = g.threads.get(e.detail.threadID)
       return unless e.detail[404] and ThreadWatcher.isWatched thread
       # Update dead status.
       ThreadWatcher.add thread
@@ -215,7 +215,7 @@ ThreadWatcher =
     ThreadWatcher.clearRequests()
 
   initLastModified: ->
-    lm = ($.lastModified['ThreadWatcher'] or= {})
+    lm = ($.lastModified['ThreadWatcher'] or= $.dict())
     for siteID, boards of ThreadWatcher.dbLM.data
       for boardID, data of boards.boards
         if ThreadWatcher.db.get {siteID, boardID}
@@ -287,7 +287,7 @@ ThreadWatcher =
     {siteID, boardID} = board[0]
     lmDate = @getResponseHeader('Last-Modified')
     ThreadWatcher.dbLM.extend {siteID, boardID, val: $.item(url, lmDate)}
-    threads = {}
+    threads = $.dict()
     pageLength = 0
     nThreads = 0
     oldest = null
@@ -449,7 +449,7 @@ ThreadWatcher =
     div
 
   setPrefixes: (threads) ->
-    prefixes = {}
+    prefixes = $.dict()
     for {siteID} in threads
       continue if siteID of prefixes
       len = 0
@@ -474,7 +474,7 @@ ThreadWatcher =
     ThreadWatcher.setPrefixes threads
     for {siteID, boardID, threadID, data} in threads
       # Add missing excerpt for threads added by Auto Watch
-      if not data.excerpt? and siteID is g.SITE.ID and (thread = g.threads["#{boardID}.#{threadID}"]) and thread.OP
+      if not data.excerpt? and siteID is g.SITE.ID and (thread = g.threads.get("#{boardID}.#{threadID}")) and thread.OP
         ThreadWatcher.db.extend {boardID, threadID, val: {excerpt: Get.threadExcerpt thread}}
       nodes.push ThreadWatcher.makeLine siteID, boardID, threadID, data
     {list} = ThreadWatcher
@@ -554,7 +554,7 @@ ThreadWatcher =
     ThreadWatcher.addRaw boardID, threadID, data, cb
 
   addRaw: (boardID, threadID, data, cb) ->
-    oldData = ThreadWatcher.db.get {boardID, threadID, defaultValue: {}}
+    oldData = ThreadWatcher.db.get {boardID, threadID, defaultValue: $.dict()}
     delete oldData.last
     delete oldData.modified
     $.extend oldData, data
@@ -594,7 +594,7 @@ ThreadWatcher =
           $.rmClass  entryEl, rmClass
           entryEl.textContent = text
           true
-      $.on entryEl, 'click', -> ThreadWatcher.toggle g.threads["#{g.BOARD}.#{g.THREADID}"]
+      $.on entryEl, 'click', -> ThreadWatcher.toggle g.threads.get("#{g.BOARD}.#{g.THREADID}")
 
     addMenuEntries: ->
       entries = []

src/Monitoring/Unread.coffee

@@ -131,7 +131,7 @@ Unread =
     postIDs = Unread.thread.posts.keys
     for i in [Unread.readCount...postIDs.length] by 1
       ID = +postIDs[i]
-      unless Unread.thread.posts[ID].isFetchedQuote
+      unless Unread.thread.posts.get(ID).isFetchedQuote
         break if ID > Unread.lastReadPost
         Unread.posts.delete ID
         Unread.postsQuotingYou.delete ID
@@ -217,7 +217,7 @@ Unread =
     postIDs = Unread.thread.posts.keys
     for i in [Unread.readCount...postIDs.length] by 1
       ID = +postIDs[i]
-      unless Unread.thread.posts[ID].isFetchedQuote
+      unless Unread.thread.posts.get(ID).isFetchedQuote
         break if Unread.posts.has ID
         Unread.lastReadPost = ID
       Unread.readCount++

src/Monitoring/UnreadIndex.coffee

@@ -1,7 +1,7 @@
 UnreadIndex =
-  lastReadPost: {}
+  lastReadPost: $.dict()
-  hr: {}
+  hr:           $.dict()
-  markReadLink: {}
+  markReadLink: $.dict()
 
   init: ->
     return unless g.VIEW is 'index' and Conf['Remember Last Read Post'] and Conf['Unread Line in Index']
@@ -27,7 +27,7 @@ UnreadIndex =
   onIndexRefresh: (e) ->
     return if e.detail.isCatalog
     for threadID in e.detail.threadIDs
-      thread = g.threads[threadID]
+      thread = g.threads.get(threadID)
       UnreadIndex.update thread
 
   onPostsInserted: (e) ->

src/Posting/Captcha.fixes.coffee

@@ -154,7 +154,7 @@ Captcha.fixes =
     else if n isnt 9 and (i = @imageKeys16.indexOf key) >= 0 and i % 4 < w and (img = @images[n - (4 - i//4)*w + (i % 4)])
       img.click()
       verify.focus()
-    else if dx = {'Up': n, 'Down': w, 'Left': last, 'Right': 1}[key]
+    else if dx = $.getOwn({'Up': n, 'Down': w, 'Left': last, 'Right': 1}, key)
       x = (x + dx) % (n + w)
       if n < x < last
         x = if dx is last then n else last

src/Posting/QR.coffee

@@ -112,7 +112,7 @@ QR =
   statusCheck: ->
     return unless QR.nodes
     {thread} = QR.posts[0]
-    if thread isnt 'new' and g.threads["#{g.BOARD}.#{thread}"].isDead
+    if thread isnt 'new' and g.threads.get("#{g.BOARD}.#{thread}").isDead
       QR.abort()
     else
       QR.status()
@@ -258,7 +258,7 @@ QR =
   status: ->
     return unless QR.nodes
     {thread} = QR.posts[0]
-    if thread isnt 'new' and g.threads["#{g.BOARD}.#{thread}"].isDead
+    if thread isnt 'new' and g.threads.get("#{g.BOARD}.#{thread}").isDead
       value    = 'Dead'
       disabled = true
       QR.cooldown.auto = false
@@ -402,7 +402,7 @@ QR =
     if file
       {type} = file
       blob = new Blob [file], {type}
-      blob.name = "#{Conf['pastedname']}.#{QR.extensionFromType[type] or 'jpg'}"
+      blob.name = "#{Conf['pastedname']}.#{$.getOwn(QR.extensionFromType, type) or 'jpg'}"
       QR.open()
       QR.handleFiles [blob]
       $.addClass QR.nodes.el, 'dump'
@@ -651,7 +651,7 @@ QR =
     post = QR.posts[0]
     post.forceSave()
     threadID = post.thread
-    thread = g.BOARD.threads[threadID]
+    thread = g.BOARD.threads.get(threadID)
     if g.BOARD.ID is 'f' and threadID is 'new'
       filetag = QR.nodes.flashTag.value
 
@@ -662,7 +662,7 @@ QR =
         err = 'New threads require a subject.'
       else unless !!g.BOARD.config.text_only or post.file
         err = 'No file selected.'
-    else if g.BOARD.threads[threadID].isClosed
+    else if g.BOARD.threads.get(threadID).isClosed
       err = 'You can\'t reply to this thread anymore.'
     else unless post.com or post.file
       err = 'No comment or file.'

src/Posting/QR.cooldown.coffee

@@ -7,7 +7,7 @@ QR.cooldown =
   init: ->
     return unless Conf['Quick Reply']
     @data = Conf['cooldowns']
-    @changes = {}
+    @changes = $.dict()
     $.sync 'cooldowns', @sync
 
   # Called from QR
@@ -35,7 +35,7 @@ QR.cooldown =
     QR.cooldown.count()
 
   sync: (data) ->
-    QR.cooldown.data = data or {}
+    QR.cooldown.data = data or $.dict()
     QR.cooldown.start()
 
   add: (threadID, postID) ->
@@ -63,7 +63,7 @@ QR.cooldown =
 
   delete: (post) ->
     return unless QR.cooldown.data
-    cooldowns = (QR.cooldown.data[post.board.ID] or= {})
+    cooldowns = (QR.cooldown.data[post.board.ID] or= $.dict())
     for id, cooldown of cooldowns
       if !cooldown.delay? and cooldown.threadID is post.thread.ID and cooldown.postID is post.ID
         QR.cooldown.set post.board.ID, id, null
@@ -71,7 +71,7 @@ QR.cooldown =
 
   secondsDeletion: (post) ->
     return 0 unless QR.cooldown.data and Conf['Cooldown']
-    cooldowns = QR.cooldown.data[post.board.ID] or {}
+    cooldowns = QR.cooldown.data[post.board.ID] or $.dict()
     for start, cooldown of cooldowns
       if !cooldown.delay? and cooldown.threadID is post.thread.ID and cooldown.postID is post.ID
         seconds = QR.cooldown.delays.deletion - (Date.now() - start) // $.SECOND
@@ -87,25 +87,25 @@ QR.cooldown =
 
   mergeChange: (data, scope, id, value) ->
     if value
-      (data[scope] or= {})[id] = value
+      (data[scope] or= $.dict())[id] = value
     else if scope of data
       delete data[scope][id]
       delete data[scope] if Object.keys(data[scope]).length is 0
 
   set: (scope, id, value) ->
     QR.cooldown.mergeChange QR.cooldown.data, scope, id, value
-    (QR.cooldown.changes[scope] or= {})[id] = value
+    (QR.cooldown.changes[scope] or= $.dict())[id] = value
 
   save: ->
     {changes} = QR.cooldown
     return unless Object.keys(changes).length
-    $.get 'cooldowns', {}, ({cooldowns}) ->
+    $.get 'cooldowns', $.dict(), ({cooldowns}) ->
       for scope of QR.cooldown.changes
         for id, value of QR.cooldown.changes[scope]
           QR.cooldown.mergeChange cooldowns, scope, id, value
         QR.cooldown.data = cooldowns
       $.set 'cooldowns', cooldowns, ->
-        QR.cooldown.changes = {}
+        QR.cooldown.changes = $.dict()
 
   update: ->
     return unless QR.cooldown.isCounting
@@ -117,7 +117,7 @@ QR.cooldown =
     seconds = 0
 
     if Conf['Cooldown'] then for scope in [g.BOARD.ID, 'global']
-      cooldowns = (QR.cooldown.data[scope] or= {})
+      cooldowns = (QR.cooldown.data[scope] or= $.dict())
 
       for start, cooldown of cooldowns
         start = +start

src/Posting/QR.post.coffee

@@ -122,6 +122,7 @@ QR.post = class
       @spoiler = input.checked
       return
     {name}  = input.dataset
+    return unless name in ['thread', 'name', 'email', 'sub', 'com', 'filename', 'flag']
     prev    = @[name]
     @[name] = input.value or input.dataset.default or null
     switch name
@@ -340,7 +341,7 @@ QR.post = class
     @file.newName = (@filename or '').replace /[/\\]/g, '-'
     unless QR.validExtension.test @filename
       # 4chan will truncate the filename if it has no extension.
-      @file.newName += ".#{QR.extensionFromType[@file.type] or 'jpg'}"
+      @file.newName += ".#{$.getOwn(QR.extensionFromType, @file.type) or 'jpg'}"
 
   updateFilename: ->
     long = "#{@filename} (#{@filesize})"

src/Quotelinks/QuoteBacklink.coffee

@@ -10,7 +10,7 @@ QuoteBacklink =
   # Second callback adds relevant containers into posts.
   # This is is so that fetched posts can get their backlinks,
   # and that as much backlinks are appended in the background as possible.
-  containers: {}
+  containers: $.dict()
   init: ->
     return if g.VIEW not in ['index', 'thread'] or !Conf['Quote Backlinks']
 
@@ -35,7 +35,7 @@ QuoteBacklink =
     $.add a, QuoteYou.mark.cloneNode(true) if markYours
     for quote in @quotes
       containers = [QuoteBacklink.getContainer quote]
-      if (post = g.posts[quote]) and post.nodes.backlinkContainer
+      if (post = g.posts.get(quote)) and post.nodes.backlinkContainer
         # Don't add OP clones when OP Backlinks is disabled,
         # as the clones won't have the backlink containers.
         for clone in post.clones

src/Quotelinks/QuoteInline.coffee

@@ -33,7 +33,7 @@ QuoteInline =
     return if $.modifiedClick e
 
     {boardID, threadID, postID} = Get.postDataFromLink @
-    return if Conf['Inline Cross-thread Quotes Only'] and g.VIEW is 'thread' and g.posts["#{boardID}.#{postID}"]?.nodes.root.offsetParent # exists and not hidden
+    return if Conf['Inline Cross-thread Quotes Only'] and g.VIEW is 'thread' and g.posts.get("#{boardID}.#{postID}")?.nodes.root.offsetParent # exists and not hidden
     return if $.hasClass(doc, 'catalog-mode')
 
     e.preventDefault()
@@ -66,7 +66,7 @@ QuoteInline =
     new Fetcher boardID, threadID, postID, inline, quoter
 
     return if not (
-      (post = g.posts["#{boardID}.#{postID}"]) and
+      (post = g.posts.get("#{boardID}.#{postID}")) and
       context.thread is post.thread
     )
 
@@ -98,13 +98,13 @@ QuoteInline =
     return if not (el = root.firstElementChild)
 
     # Dereference clone.
-    post = g.posts["#{boardID}.#{postID}"]
+    post = g.posts.get("#{boardID}.#{postID}")
     post.rmClone el.dataset.clone
 
     # Decrease forward count and unhide.
     if Conf['Forward Hiding'] and
       isBacklink and
-      context.thread is g.threads["#{boardID}.#{threadID}"] and
+      context.thread is g.threads.get("#{boardID}.#{threadID}") and
       not --post.forwarded
         delete post.forwarded
         $.rmClass post.nodes.root, 'forwarded'

src/Quotelinks/QuotePreview.coffee

@@ -40,7 +40,7 @@ QuotePreview =
       endEvents: 'mouseout click'
       cb: QuotePreview.mouseout
 
-    if Conf['Quote Highlighting'] and (origin = g.posts["#{boardID}.#{postID}"])
+    if Conf['Quote Highlighting'] and (origin = g.posts.get("#{boardID}.#{postID}"))
       posts = [origin].concat origin.clones
       # Remove the clone that's in the qp from the array.
       posts.pop()

src/Quotelinks/QuoteStrikeThrough.coffee

@@ -11,6 +11,6 @@ QuoteStrikeThrough =
     return if @isClone
     for quotelink in @nodes.quotelinks
       {boardID, postID} = Get.postDataFromLink quotelink
-      if g.posts["#{boardID}.#{postID}"]?.isHidden
+      if g.posts.get("#{boardID}.#{postID}")?.isHidden
         $.addClass quotelink, 'filtered'
     return

src/Quotelinks/QuoteThreading.coffee

@@ -34,9 +34,9 @@ QuoteThreading =
       name: 'Quote Threading'
       cb:   @node
 
-  parent:   {}
+  parent:   $.dict()
-  children: {}
+  children: $.dict()
-  inserted: {}
+  inserted: $.dict()
 
   toggleThreading: ->
     @setThreadingState !Conf['Thread Quotes']
@@ -65,7 +65,7 @@ QuoteThreading =
 
     parents = new Set()
     lastParent = null
-    for quote in @quotes when parent = g.posts[quote]
+    for quote in @quotes when parent = g.posts.get(quote)
       if not parent.isFetchedQuote and parent.isReply and parent.ID < @ID
         parents.add parent.ID
         lastParent = parent if not lastParent or parent.ID > lastParent.ID
@@ -141,7 +141,7 @@ QuoteThreading =
     else
       nodes = []
       Unread.order = new RandomAccessList()
-      QuoteThreading.inserted = {}
+      QuoteThreading.inserted = $.dict()
       posts.forEach (post) ->
         return if post.isFetchedQuote
         Unread.order.push post

src/Quotelinks/Quotify.coffee

@@ -54,7 +54,7 @@ Quotify =
       @board.ID
     quoteID = "#{boardID}.#{postID}"
 
-    if post = g.posts[quoteID]
+    if post = g.posts.get(quoteID)
       unless post.isDead
         # Don't (Dead) when quotifying in an archived post,
         # and we know the post still exists.

src/classes/CatalogThreadNative.coffee

@@ -9,4 +9,4 @@ class CatalogThreadNative
     @boardID = @nodes.thumb.parentNode.pathname.split(/\/+/)[1]
     @board = g.boards[@boardID] or new Board(@boardID)
     @ID = @threadID = +(root.dataset.id or root.id).match(/\d*$/)[0]
-    @thread = @board.threads[@ID] or new Thread(@ID, @board)
+    @thread = @board.threads.get(@ID) or new Thread(@ID, @board)

src/classes/Connection.coffee

@@ -17,6 +17,6 @@ class Connection
       typeof e.data is 'string' and
       e.data[...g.NAMESPACE.length] is g.NAMESPACE
     data = JSON.parse e.data[g.NAMESPACE.length..]
-    for type, value of data
+    for type, value of data when $.hasOwn(@cb, type)
-      @cb[type]? value
+      @cb[type] value
     return

src/classes/DataBoard.coffee

@@ -19,14 +19,14 @@ class DataBoard
       @data['4chan.org'] = {boards, lastChecked}
       delete @data.boards
       delete @data.lastChecked
-    @data[g.SITE.ID] or= boards: {}
+    @data[g.SITE.ID] or= boards: $.dict()
 
   changes: []
 
   save: (change, cb) ->
     change()
     @changes.push change
-    $.get @key, {boards: {}}, (items) =>
+    $.get @key, {boards: $.dict()}, (items) =>
       return unless @changes.length
       needSync = ((items[@key].version or 0) > (@data.version or 0))
       if needSync
@@ -39,7 +39,7 @@ class DataBoard
         cb?()
 
   forceSync: (cb) ->
-    $.get @key, {boards: {}}, (items) =>
+    $.get @key, {boards: $.dict()}, (items) =>
       if (items[@key].version or 0) > (@data.version or 0)
         @initData items[@key]
         change() for change in @changes
@@ -78,17 +78,17 @@ class DataBoard
 
   setUnsafe: ({siteID, boardID, threadID, postID, val}) ->
     siteID or= g.SITE.ID
-    @data[siteID] or= boards: {}
+    @data[siteID] or= boards: $.dict()
     if postID isnt undefined
-      ((@data[siteID].boards[boardID] or= {})[threadID] or= {})[postID] = val
+      ((@data[siteID].boards[boardID] or= $.dict())[threadID] or= $.dict())[postID] = val
     else if threadID isnt undefined
-      (@data[siteID].boards[boardID] or= {})[threadID] = val
+      (@data[siteID].boards[boardID] or= $.dict())[threadID] = val
     else
       @data[siteID].boards[boardID] = val
 
   extend: ({siteID, boardID, threadID, postID, val}, cb) ->
     @save =>
-      oldVal = @get {siteID, boardID, threadID, postID, defaultValue: {}}
+      oldVal = @get {siteID, boardID, threadID, postID, defaultValue: $.dict()}
       for key, subVal of val
         if typeof subVal is 'undefined'
           delete oldVal[key]
@@ -147,7 +147,7 @@ class DataBoard
   ajaxCleanParse: (boardID, response1, response2) ->
     siteID = g.SITE.ID
     return if not (board = @data[siteID].boards[boardID])
-    threads = {}
+    threads = $.dict()
     if response1
       for page in response1
         for thread in page.threads

src/classes/Fetcher.coffee

@@ -1,11 +1,11 @@
 class Fetcher
   constructor: (@boardID, @threadID, @postID, @root, @quoter) ->
-    if post = g.posts["#{@boardID}.#{@postID}"]
+    if post = g.posts.get("#{@boardID}.#{@postID}")
       @insert post
       return
 
     # 4chan X catalog data
-    if (post = Index.replyData?["#{@boardID}.#{@postID}"]) and (thread = g.threads["#{@boardID}.#{@threadID}"])
+    if (post = Index.replyData?["#{@boardID}.#{@postID}"]) and (thread = g.threads.get("#{@boardID}.#{@threadID}"))
       board  = g.boards[@boardID]
       post = new Post g.SITE.Build.postFromObject(post, @boardID), thread, board, {isFetchedQuote: true}
       Main.callbackNodes 'Post', [post]
@@ -53,7 +53,7 @@ class Fetcher
   fetchedPost: (req, isCached) ->
     # In case of multiple callbacks for the same request,
     # don't parse the same original post more than once.
-    if post = g.posts["#{@boardID}.#{@postID}"]
+    if post = g.posts.get("#{@boardID}.#{@postID}")
       @insert post
       return
 
@@ -96,7 +96,7 @@ class Fetcher
 
     board = g.boards[@boardID] or
       new Board @boardID
-    thread = g.threads["#{@boardID}.#{@threadID}"] or
+    thread = g.threads.get("#{@boardID}.#{@threadID}") or
       new Thread @threadID, board
     post = new Post g.SITE.Build.postFromObject(post, @boardID), thread, board, {isFetchedQuote: true}
     Main.callbackNodes 'Post', [post]
@@ -115,7 +115,7 @@ class Fetcher
           for key of media when /_link$/.test key
             # Image/thumbnail URLs loaded over HTTP can be modified in transit.
             # Require them to be from an HTTP host so that no referrer is sent to them from an HTTPS page.
-            delete media[key] unless media[key]?.match /^http:\/\//
+            delete media[key] unless $.getOwn(media, key)?.match /^http:\/\//
         that.parseArchivedPost @response, url, archive
       return true
     return false
@@ -123,7 +123,7 @@ class Fetcher
   parseArchivedPost: (data, url, archive) ->
     # In case of multiple callbacks for the same request,
     # don't parse the same original post more than once.
-    if post = g.posts["#{@boardID}.#{@postID}"]
+    if post = g.posts.get("#{@boardID}.#{@postID}")
       @insert post
       return
 
@@ -210,7 +210,7 @@ class Fetcher
 
     board = g.boards[@boardID] or
       new Board @boardID
-    thread = g.threads["#{@boardID}.#{@threadID}"] or
+    thread = g.threads.get("#{@boardID}.#{@threadID}") or
       new Thread @threadID, board
     post = new Post g.SITE.Build.post(o), thread, board, {isFetchedQuote: true}
     post.kill()

src/classes/Post.coffee

@@ -59,9 +59,9 @@ class Post
     <% if (readJSON('/.tests_enabled')) { %>
     return if @forBuildTest
     <% } %>
-    if g.posts[@fullID]
+    if g.posts.get(@fullID)
       @isRebuilt = true
-      @clones = g.posts[@fullID].clones
+      @clones = g.posts.get(@fullID).clones
       clone.origin = @ for clone in @clones
 
     @thread.lastPost = @ID if !@isFetchedQuote and @ID > @thread.lastPost

src/classes/ShimSet.coffee

@@ -1,6 +1,6 @@
 class ShimSet
   constructor: ->
-    @elements = {}
+    @elements = $.dict()
     @size = 0
   has: (value) ->
     value of @elements

src/classes/SimpleDict.coffee

@@ -16,3 +16,9 @@ class SimpleDict
   forEach: (fn) -> 
     fn @[key] for key in [@keys...]
     return
+
+  get: (key) ->
+    if key is 'keys'
+      undefined
+    else
+      $.getOwn(@, key)

src/classes/Thread.coffee

@@ -1,7 +1,8 @@
 class Thread
   toString: -> @ID
 
-  constructor: (@ID, @board) ->
+  constructor: (ID, @board) ->
+    @ID         = +ID
     @threadID   = @ID
     @boardID    = @board.ID
     @siteID     = g.SITE.ID

src/css/CSS.js

@@ -27,7 +27,7 @@ sub: function(css) {
     var sel = variables;
     for (var i = 0; i < words.length; i++) {
       if (typeof sel !== 'object') return ':not(*)';
-      sel = sel[words[i]];
+      sel = $.getOwn(sel, words[i]);
     }
     if (typeof sel !== 'string') return ':not(*)';
     return sel;

src/globals/globals.js

@@ -1,6 +1,6 @@
 var Conf, E, c, d, doc, docSet, g;
 
-Conf = {};
+Conf = Object.create(null);
 c    = console;
 d    = document;
 doc  = d.documentElement;
@@ -13,8 +13,8 @@ docSet = function() {
 g = {
   VERSION:   '<%= readJSON('/version.json').version %>',
   NAMESPACE: '<%= meta.name %>.',
-  sites:     {},
+  sites:     Object.create(null),
-  boards:    {}
+  boards:    Object.create(null)
 };
 
 E = (function() {

src/main/Main.coffee

@@ -33,7 +33,7 @@ Main =
     # Flatten default values from Config into Conf
     flatten = (parent, obj) ->
       if obj instanceof Array
-        Conf[parent] = obj[0]
+        Conf[parent] = $.dict.clone(obj[0])
       else if typeof obj is 'object'
         for key, val of obj
           flatten key, val
@@ -57,15 +57,15 @@ Main =
     flatten null, Config
 
     for db in DataBoard.keys
-      Conf[db] = {}
+      Conf[db] = $.dict()
-    Conf['customTitles'] = {'4chan.org': {boards: {'qa': {'boardTitle': {orig: '/qa/ - Question & Answer', title: '/qa/ - 2D / Random'}}}}}
+    Conf['customTitles'] = $.dict.clone {'4chan.org': {boards: {'qa': {'boardTitle': {orig: '/qa/ - Question & Answer', title: '/qa/ - 2D / Random'}}}}}
-    Conf['boardConfig'] = boards: {}
+    Conf['boardConfig'] = boards: $.dict()
     Conf['archives'] = Redirect.archives
-    Conf['selectedArchives'] = {}
+    Conf['selectedArchives'] = $.dict()
-    Conf['cooldowns'] = {}
+    Conf['cooldowns'] = $.dict()
-    Conf['Index Sort'] = {}
+    Conf['Index Sort'] = $.dict()
-    Conf["Last Long Reply Thresholds #{i}"] = {} for i in [0...2]
+    Conf["Last Long Reply Thresholds #{i}"] = $.dict() for i in [0...2]
-    Conf['siteProperties'] = {}
+    Conf['siteProperties'] = $.dict()
 
     # XXX old key names
     Conf['Except Archives from Encryption'] = false
@@ -84,7 +84,7 @@ Main =
         $.addCSP "script-src #{jsWhitelist.replace(/^#.*$/mg, '').replace(/[\s;]+/g, ' ').trim()}"
 
     # Get saved values as items
-    items = {}
+    items = $.dict()
     items[key] = undefined for key of Conf
     items['previousversion'] = undefined
     ($.getSync or $.get) items, (items) ->
@@ -363,7 +363,7 @@ Main =
       else
         g.BOARD
       threadID = +threadRoot.id.match(/\d*$/)[0]
-      return if !threadID or boardObj.threads[threadID]?.nodes.root
+      return if !threadID or boardObj.threads.get(threadID)?.nodes.root
       thread = new Thread threadID, boardObj
       thread.nodes.root = threadRoot
       threads.push thread

src/platform/$.coffee

@@ -40,6 +40,32 @@ $.extend = (object, properties) ->
     object[key] = val
   return
 
+$.dict = ->
+  Object.create(null)
+
+$.dict.clone = (obj) ->
+  if typeof obj isnt 'object' or obj is null
+    obj
+  else if obj instanceof Array
+    arr = []
+    for i in [0...obj.length] by 1
+      arr.push $.dict.clone(obj[i])
+    arr
+  else
+    map = Object.create(null)
+    for key, val of obj
+      map[key] = $.dict.clone(val)
+    map
+
+$.dict.json = (str) ->
+  $.dict.clone(JSON.parse(str))
+
+$.hasOwn = (obj, key) ->
+  Object::hasOwnProperty.call(obj, key)
+
+$.getOwn = (obj, key) ->
+  if Object::hasOwnProperty.call(obj, key) then obj[key] else undefined
+
 $.ajax = do ->
   if window.wrappedJSObject and not XMLHttpRequest.wrappedJSObject
     pageXHR = XPCNativeWrapper window.wrappedJSObject.XMLHttpRequest
@@ -85,7 +111,7 @@ $.ajax = do ->
 # XXX https://bugs.chromium.org/p/chromium/issues/detail?id=920638
 do ->
   requestID = 0
-  requests = {}
+  requests = $.dict()
 
   $.ajaxPageInit = ->
     if Conf['Chromium CORB Bug'] and g.SITE.software is 'yotsuba'
@@ -97,7 +123,7 @@ do ->
               $.set 'Chromium CORB Bug', (Conf['Chromium CORB Bug'] = false)
 
     $.global ->
-      window.FCX.requests = {}
+      window.FCX.requests = Object.create(null)
 
       document.addEventListener '4chanXAjax', (e) ->
         {url, timeout, responseType, withCredentials, type, onprogress, form, headers, id} = e.detail
@@ -144,7 +170,8 @@ do ->
       return unless (req = requests[e.detail.id])
       delete requests[e.detail.id]
       if e.detail.status
-        $.extend req, e.detail
+        for key in ['status', 'statusText', 'response', 'responseHeaderString']
+          req[key] = e.detail[key]
         if req.responseType is 'document'
           req.response = new DOMParser().parseFromString(e.detail.response, 'text/html')
       req.onloadend()
@@ -165,7 +192,7 @@ do ->
 # Status Code 304: Not modified
 # With the `If-Modified-Since` header we only receive the HTTP headers and no body for 304 responses.
 # This saves a lot of bandwidth and CPU time for both the users and the servers.
-$.lastModified = {}
+$.lastModified = $.dict()
 $.whenModified = (url, bucket, cb, options={}) ->
   {timeout, ajax} = options
   params = []
@@ -174,12 +201,12 @@ $.whenModified = (url, bucket, cb, options={}) ->
   params.push "t=#{Date.now()}" if url.split('/')[2] is 'a.4cdn.org'
   url0 = url
   url += '?' + params.join('&') if params.length
-  headers = {}
+  headers = $.dict()
   if (t = $.lastModified[bucket]?[url0])?
     headers['If-Modified-Since'] = t
   r = (ajax or $.ajax) url, {
     onloadend: ->
-      ($.lastModified[bucket] or= {})[url0] = @getResponseHeader('Last-Modified')
+      ($.lastModified[bucket] or= $.dict())[url0] = @getResponseHeader('Last-Modified')
       cb.call @
     timeout
     headers
@@ -187,7 +214,7 @@ $.whenModified = (url, bucket, cb, options={}) ->
   r
 
 do ->
-  reqs = {}
+  reqs = $.dict()
   $.cache = (url, cb, options={}) ->
     {ajax} = options
     if (req = reqs[url])
@@ -212,11 +239,13 @@ do ->
 
 $.cb =
   checked: ->
-    $.set @name, @checked
+    if $.hasOwn(Conf, @name)
-    Conf[@name] = @checked
+      $.set @name, @checked
+      Conf[@name] = @checked
   value: ->
-    $.set @name, @value.trim()
+    if $.hasOwn(Conf, @name)
-    Conf[@name] = @value
+      $.set @name, @value.trim()
+      Conf[@name] = @value
 
 $.asap = (test, cb) ->
   if test()
@@ -478,14 +507,14 @@ $.platform = '<%= type %>';
 
 $.hasStorage = do ->
   try
-    return true if localStorage[g.NAMESPACE + 'hasStorage'] is 'true'
+    return true if localStorage.getItem(g.NAMESPACE + 'hasStorage') is 'true'
-    localStorage[g.NAMESPACE + 'hasStorage'] = 'true'
+    localStorage.setItem(g.NAMESPACE + 'hasStorage', 'true')
-    return localStorage[g.NAMESPACE + 'hasStorage'] is 'true'
+    return localStorage.getItem(g.NAMESPACE + 'hasStorage') is 'true'
   catch
     false
 
 $.item = (key, val) ->
-  item = {}
+  item = $.dict()
   item[key] = val
   item
 
@@ -496,7 +525,7 @@ $.oneItemSugar = (fn) ->
     else
       fn key, val
 
-$.syncing = {}
+$.syncing = $.dict()
 
 $.securityCheck = (data) ->
   if location.protocol isnt 'https:'
@@ -505,13 +534,13 @@ $.securityCheck = (data) ->
 <% if (type === 'crx') { %>
 # https://developer.chrome.com/extensions/storage.html
 $.oldValue =
-  local: {}
+  local: $.dict()
-  sync:  {}
+  sync:  $.dict()
 
 chrome.storage.onChanged.addListener (changes, area) ->
   for key of changes
     oldValue = $.oldValue.local[key] ? $.oldValue.sync[key]
-    $.oldValue[area][key] = changes[key].newValue
+    $.oldValue[area][key] = $.dict.clone(changes[key].newValue)
     newValue = $.oldValue.local[key] ? $.oldValue.sync[key]
     cb = $.syncing[key]
     if cb and JSON.stringify(newValue) isnt JSON.stringify(oldValue)
@@ -542,11 +571,12 @@ $.get = $.oneItemSugar (data, cb) ->
     if $.engine is 'gecko' and area is 'sync' and keys.length > 3
       keys = null
     chrome.storage[area].get keys, (result) ->
+      result = $.dict.clone(result)
       if chrome.runtime.lastError
         c.error chrome.runtime.lastError.message
       if keys is null
-        result2 = {}
+        result2 = $.dict()
-        result2[key] = val for key, val of result when key of data
+        result2[key] = val for key, val of result when $.hasOwn(data, key)
         result = result2
       for key of data
         $.oldValue[area][key] = result[key]
@@ -560,8 +590,8 @@ $.get = $.oneItemSugar (data, cb) ->
 
 do ->
   items =
-    local: {}
+    local: $.dict()
-    sync:  {}
+    sync:  $.dict()
 
   exceedsQuota = (key, value) ->
     # bytes in UTF-8
@@ -579,7 +609,7 @@ do ->
 
   timeout = {}
   setArea = (area, cb) ->
-    data = {}
+    data = $.dict()
     $.extend data, items[area]
     return if !Object.keys(data).length or timeout[area] > Date.now()
     chrome.storage[area].set data, ->
@@ -609,8 +639,8 @@ do ->
 
   $.clear = (cb) ->
     return unless $.crxWorking()
-    items.local = {}
+    items.local = $.dict()
-    items.sync  = {}
+    items.sync  = $.dict()
     count = 2
     err   = null
     done  = ->
@@ -631,7 +661,7 @@ if GM?.deleteValue? and window.BroadcastChannel and not GM_addValueChangeListene
 
   $.on $.syncChannel, 'message', (e) ->
     for key, val of e.data when (cb = $.syncing[key])
-      cb JSON.parse(JSON.stringify(val)), key
+      cb $.dict.json(JSON.stringify(val)), key
 
   $.sync = (key, cb) ->
     $.syncing[key] = cb
@@ -642,7 +672,7 @@ if GM?.deleteValue? and window.BroadcastChannel and not GM_addValueChangeListene
     unless keys instanceof Array
       keys = [keys]
     Promise.all(GM.deleteValue(g.NAMESPACE + key) for key in keys).then ->
-      items = {}
+      items = $.dict()
       items[key] = undefined for key in keys
       $.syncChannel.postMessage items
       cb?()
@@ -651,7 +681,7 @@ if GM?.deleteValue? and window.BroadcastChannel and not GM_addValueChangeListene
     keys = Object.keys items
     Promise.all(GM.getValue(g.NAMESPACE + key) for key in keys).then (values) ->
       for val, i in values when val
-        items[keys[i]] = JSON.parse val
+        items[keys[i]] = $.dict.json val
       cb items
 
   $.set = $.oneItemSugar (items, cb) ->
@@ -675,7 +705,7 @@ else
     $.getValue   = GM_getValue
     $.listValues = -> GM_listValues() # error when called if missing
   else if $.hasStorage
-    $.getValue = (key) -> localStorage[key]
+    $.getValue = (key) -> localStorage.getItem(key)
     $.listValues = ->
       key for key of localStorage when key[...g.NAMESPACE.length] is g.NAMESPACE
   else
@@ -686,12 +716,12 @@ else
     $.setValue    = GM_setValue
     $.deleteValue = GM_deleteValue
   else if GM_deleteValue?
-    $.oldValue = {}
+    $.oldValue = $.dict()
     $.setValue = (key, val) ->
       GM_setValue key, val
       if key of $.syncing
         $.oldValue[key]   = val
-        localStorage[key] = val if $.hasStorage # for `storage` events
+        localStorage.setItem(key, val) if $.hasStorage # for `storage` events
     $.deleteValue = (key) ->
       GM_deleteValue key
       if key of $.syncing
@@ -699,10 +729,10 @@ else
         localStorage.removeItem key if $.hasStorage # for `storage` events
     $.cantSync = true if !$.hasStorage
   else if $.hasStorage
-    $.oldValue = {}
+    $.oldValue = $.dict()
     $.setValue = (key, val) ->
       $.oldValue[key]   = val if key of $.syncing
-      localStorage[key] = val
+      localStorage.setItem(key, val)
     $.deleteValue = (key) ->
       delete $.oldValue[key] if key of $.syncing
       localStorage.removeItem key
@@ -715,7 +745,7 @@ else
     $.sync = (key, cb) ->
       $.syncing[key] = GM_addValueChangeListener g.NAMESPACE + key, (key2, oldValue, newValue, remote) ->
         if remote
-          newValue = JSON.parse newValue unless newValue is undefined
+          newValue = $.dict.json newValue unless newValue is undefined
           cb newValue, key
     $.forceSync = ->
   else if GM_deleteValue? or $.hasStorage
@@ -730,7 +760,7 @@ else
         if newValue?
           return if newValue is $.oldValue[key]
           $.oldValue[key] = newValue
-          cb JSON.parse(newValue), key[g.NAMESPACE.length..]
+          cb $.dict.json(newValue), key[g.NAMESPACE.length..]
         else
           return unless $.oldValue[key]?
           delete $.oldValue[key]
@@ -760,7 +790,7 @@ else
   $.getSync = (items, cb) ->
     for key of items when (val2 = $.getValue g.NAMESPACE + key)
       try
-        items[key] = JSON.parse val2
+        items[key] = $.dict.json val2
       catch err
         # XXX https://github.com/ccd0/4chan-x/issues/2218
         unless /^(?:undefined)*$/.test(val2)

src/platform/CrossOrigin.coffee

@@ -10,7 +10,7 @@ eventPageRequest = do ->
 
 <% } %>
 CrossOrigin =
-  binary: (url, cb, headers={}) ->
+  binary: (url, cb, headers=$.dict()) ->
     # XXX https://forums.lanik.us/viewtopic.php?f=64&t=24173&p=78310
     url = url.replace /^((?:https?:)?\/\/(?:\w+\.)?(?:4chan|4channel|4cdn)\.org)\/adv\//, '$1//adv/'
     <% if (type === 'crx') { %>
@@ -73,7 +73,7 @@ CrossOrigin =
         name = match.replace /\\"/g, '"'
       if /^text\/plain;\s*charset=x-user-defined$/i.test(mime)
         # In JS Blocker (Safari) content type comes back as 'text/plain; charset=x-user-defined'; guess from filename instead.
-        mime = QR.typeFromExtension[name.match(/[^.]*$/)[0].toLowerCase()] or 'application/octet-stream'
+        mime = $.getOwn(QR.typeFromExtension, name.match(/[^.]*$/)[0].toLowerCase()) or 'application/octet-stream'
       blob = new Blob([data], {type: mime})
       blob.name = name
       cb blob
@@ -85,13 +85,13 @@ CrossOrigin =
     responseHeaderString: null
     getResponseHeader: (headerName) ->
       if !@responseHeaders? and @responseHeaderString?
-        @responseHeaders = {}
+        @responseHeaders = $.dict()
         for header in @responseHeaderString.split('\r\n')
           if (i = header.indexOf(':')) >= 0
             key = header[...i].trim().toLowerCase()
             val = header[i+1..].trim()
             @responseHeaders[key] = val
-      (@responseHeaders or {})[headerName.toLowerCase()] ? null
+      @responseHeaders?[headerName.toLowerCase()] ? null
     abort: ->
     onloadend: ->
 

src/site/SW.tinyboard.coffee

@@ -33,7 +33,7 @@ SW.tinyboard =
   detect: ->
     for script in $$ 'script:not([src])', d.head
       if (m = script.textContent.match(/\bvar configRoot=(".*?")/))
-        properties = {}
+        properties = $.dict()
         try
           root = JSON.parse m[1]
           if root[0] is '/'

src/site/SW.yotsuba.Build.coffee

@@ -1,7 +1,7 @@
 Build =
   staticPath: '//s.4cdn.org/image/'
   gifIcon: if window.devicePixelRatio >= 2 then '@2x.gif' else '.gif'
-  spoilerRange: {}
+  spoilerRange: $.dict()
 
   shortFilename: (filename) ->
     ext = filename.match(/\.?[^\.]*$/)[0]
@@ -69,8 +69,9 @@ Build =
       o.file = SW.yotsuba.Build.parseJSONFile(data, {siteID, boardID})
       o.files.push o.file
     # Temporary JSON properties for events such as April 1 / Halloween
+    o.extra = $.dict()
     for key of data when key[0] is 'x'
-      o[key] = data[key]
+      o.extra[key] = data[key]
     o
 
   parseJSONFile: (data, {siteID, boardID}) ->
@@ -133,7 +134,7 @@ Build =
         capcodePlural      = 'Verified Users'
         capcodeDescription = ''
       else
-        capcodeLong   = {'Admin': 'Administrator', 'Mod': 'Moderator'}[capcode] or capcode
+        capcodeLong   = $.getOwn({'Admin': 'Administrator', 'Mod': 'Moderator'}, capcode) or capcode
         capcodePlural = "#{capcodeLong}s"
         capcodeDescription = "a 4chan #{capcodeLong}"
 

src/site/SW.yotsuba.Build/PostInfo.html

@@ -5,7 +5,7 @@
     ?{email}{<a href="mailto:${encodeURIComponent(email).replace(/%40/g, "@")}" class="useremail">}
       <span class="name?{capcode}{ capcode}">${name}</span>
       ?{tripcode}{ <span class="postertrip">${tripcode}</span>}
-      ?{o.xa19s}{ <span class="like-score">${o.xa19s}</span>}
+      ?{o.extra.xa19s}{ <span class="like-score">${o.extra.xa19s}</span>}
       ?{pass}{ <span title="Pass user since ${pass}" class="n-pu"></span>}
       ?{capcode}{ <strong class="capcode hand id_${capcodeLC}" title="Highlight posts by ${capcodePlural}">## ${capcode}</strong>}
     ?{email}{</a>}
@@ -19,7 +19,7 @@
   <span class="postNum?{!(boardID === "f" && !o.isReply)}{ desktop}">
     <a href="${postLink}" title="Link to this post">No.</a>
     <a href="${quoteLink}" title="Reply to this post">${ID}</a>
-    ?{o.xa19l && o.isReply}{ <a data-cmd="like-post" href="#" class="like-btn">Like! ×${o.xa19l}</a>}
+    ?{o.extra.xa19l && o.isReply}{ <a data-cmd="like-post" href="#" class="like-btn">Like! ×${o.extra.xa19l}</a>}
     ?{o.isSticky}{ <img src="${staticPath}sticky${gifIcon}" alt="Sticky" title="Sticky"?{boardID === "f"}{ style="height: 18px; width: 18px;"}{ class="stickyIcon retina"}>}
     ?{o.isClosed && !o.isArchived}{ <img src="${staticPath}closed${gifIcon}" alt="Closed" title="Closed"?{boardID === "f"}{ style="height: 18px; width: 18px;"}{ class="closedIcon retina"}>}
     ?{o.isArchived}{ <img src="${staticPath}archived${gifIcon}" alt="Archived" title="Archived" class="archivedIcon retina">}

src/site/Site.coffee

@@ -7,14 +7,14 @@ Site =
   init: (cb) ->
     $.extend Conf['siteProperties'], Site.defaultProperties
     hostname = Site.resolve()
-    if hostname and Conf['siteProperties'][hostname].software of SW
+    if hostname and $.hasOwn(SW, Conf['siteProperties'][hostname].software)
       @set hostname
       cb()
     $.onExists doc, 'body', =>
       for software of SW when (changes = SW[software].detect?())
         changes.software = software
         hostname = location.hostname.replace(/^www\./, '')
-        properties = (Conf['siteProperties'][hostname] or= {})
+        properties = (Conf['siteProperties'][hostname] or= $.dict())
         changed = 0
         for key of changes when properties[key] isnt changes[key]
           properties[key] = changes[key]
@@ -29,7 +29,7 @@ Site =
 
   resolve: (url=location) ->
     {hostname} = url
-    while hostname and hostname not of Conf['siteProperties']
+    while hostname and not $.hasOwn(Conf['siteProperties'], hostname)
       hostname = hostname.replace(/^[^.]*\.?/, '')
     if hostname
       hostname = canonical if (canonical = Conf['siteProperties'][hostname].canonical)
@@ -43,7 +43,7 @@ Site =
     for ID, properties of Conf['siteProperties']
       continue if properties.canonical
       software = properties.software
-      continue unless software and SW[software]
+      continue unless software and $.hasOwn(SW, software)
       g.sites[ID] = site = Object.create SW[software]
       $.extend site, {ID, siteID: ID, properties, software}
     g.SITE = g.sites[hostname]