Use dataset setters instead of setAttribute.

src/Filtering/Filter.coffee

@@ -206,7 +206,7 @@ Filter =
       el = $.el 'a',
         href: 'javascript:;'
         textContent: text
-      el.setAttribute 'data-type', type
+      el.dataset.type = type
       $.on el, 'click', Filter.menu.makeFilter
 
       return {

src/Filtering/ThreadHiding.coffee

@@ -96,7 +96,7 @@ ThreadHiding =
       className: "#{type}-thread-button"
       innerHTML: "<span>[&nbsp;#{if type is 'hide' then '-' else '+'}&nbsp;]</span>"
       href:      'javascript:;'
-    a.setAttribute 'data-fullid', thread.fullID
+    a.dataset.fullid = thread.fullID
     $.on a, 'click', ThreadHiding.toggle
     a
 

src/General/Clone.coffee

@@ -60,4 +60,4 @@ class Clone extends Post
     @isDead  = true if origin.isDead
     @isClone = true
     index = origin.clones.push(@) - 1
-    root.setAttribute 'data-clone', index
+    root.dataset.clone = index

src/General/Header.coffee

@@ -140,7 +140,7 @@ Header =
             a.textContent
 
           if m = t.match /-(index|catalog)/
-            a.setAttribute 'data-only', m[1]
+            a.dataset.only = m[1]
             a.href = "//boards.4chan.org/#{board}/"
             a.href += 'catalog' if m[1] is 'catalog'
 

src/General/Post.coffee

@@ -194,5 +194,5 @@ class Post
   rmClone: (index) ->
     @clones.splice index, 1
     for clone in @clones[index..]
-      clone.nodes.root.setAttribute 'data-clone', index++
+      clone.nodes.root.dataset.clone = index++
     return

src/General/Settings.coffee

@@ -458,9 +458,9 @@ Settings =
       td.innerHTML = '<select></select>'
       select = td.firstElementChild
       unless select.disabled = length is 1
-        # XXX GM can't into datasets
-        select.setAttribute 'data-boardid', boardID
-        select.setAttribute 'data-type',    type
+        $.extend select.dataset,
+          boardid: boardID
+          type: type
         $.on select, 'change', Settings.saveSelectedArchive
       $.add select, options
     else

src/Images/ImageHover.coffee

@@ -13,7 +13,7 @@ ImageHover =
     el = $.el 'img',
       id: 'ihover'
       src: post.file.URL
-    el.setAttribute 'data-fullid', post.fullID
+    el.dataset.fullid = post.fullID
     $.add d.body, el
     UI.hover
       root: @

src/Quotelinks/Quotify.coffee

@@ -44,9 +44,10 @@ Quotify =
           className:   'quotelink deadlink'
           target:      '_blank'
           textContent: "#{quote}\u00A0(Dead)"
-        a.setAttribute 'data-boardid',  boardID
-        a.setAttribute 'data-threadid', post.thread.ID
-        a.setAttribute 'data-postid',   postID
+        $.extend a.dataset,
+          boardid:  boardID
+          threadid: post.thread.ID
+          postid:   postID
     else if redirect = Redirect.to 'thread', {boardID, threadID: 0, postID}
       # Replace the .deadlink span if we can redirect.
       a = $.el 'a',
@@ -56,9 +57,10 @@ Quotify =
         textContent: "#{quote}\u00A0(Dead)"
       if Redirect.to 'post', {boardID, postID}
         # Make it function as a normal quote if we can fetch the post.
-        $.addClass a,  'quotelink'
-        a.setAttribute 'data-boardid', boardID
-        a.setAttribute 'data-postid',  postID
+        $.addClass a, 'quotelink'
+        $.extend a.dataset,
+          boardid: boardID
+          postid: postID
 
     unless quoteID in @quotes
       @quotes.push quoteID