Fix #497

4chan_x.user.js

@@ -256,6 +256,9 @@
       }
     },
     hoverend: function() {
+      if (!UI.el) {
+        return;
+      }
       $.rm(UI.el);
       return delete UI.el;
     }
@@ -3207,9 +3210,7 @@
       if (/\binlined\b/.test(this.className)) {
         return;
       }
-      if (qp = $.id('qp')) {
-        $.rm(qp);
-      }
+      UI.hoverend();
       qp = UI.el = $.el('div', {
         id: 'qp',
         className: 'post reply dialog'
@@ -3647,6 +3648,7 @@
       return $.on(post.img, 'mouseover', ImageHover.mouseover);
     },
     mouseover: function() {
+      UI.hoverend();
       UI.el = $.el('img', {
         id: 'ihover',
         src: this.parentNode.href

script.coffee

@@ -230,6 +230,7 @@ UI =
       style.right = clientWidth - clientX + 45 + 'px'
 
   hoverend: ->
+    return unless UI.el
     $.rm UI.el
     delete UI.el
 
@@ -2431,8 +2432,10 @@ QuotePreview =
     return
   mouseover: (e) ->
     return if /\binlined\b/.test @className
-    if qp = $.id 'qp'
-      $.rm qp
+
+    # Make sure to remove the previous UI.el
+    UI.hoverend()
+
     qp = UI.el = $.el 'div',
       id: 'qp'
       className: 'post reply dialog'
@@ -2771,6 +2774,9 @@ ImageHover =
     return unless post.img
     $.on post.img, 'mouseover', ImageHover.mouseover
   mouseover: ->
+    # Make sure to remove the previous UI.el
+    UI.hoverend()
+
     UI.el = $.el 'img'
       id: 'ihover'
       src: @parentNode.href