1 files changed, 24 insertions, 0 deletions
diff --git a/lib/banzai/filter/task_list_filter.rb b/lib/banzai/filter/task_list_filter.rb
new file mode 100644
index 00000000000..bdf7c2ebdfc
--- /dev/null
+++ b/lib/banzai/filter/task_list_filter.rb
@@ -0,0 +1,24 @@
+require 'banzai'
+require 'task_list/filter'
+
+module Banzai
+  module Filter
+    # Work around a bug in the default TaskList::Filter that adds a `task-list`
+    # class to every list element, regardless of whether or not it contains a
+    # task list.
+    #
+    # This is a (hopefully) temporary fix, pending a new release of the
+    # task_list gem.
+    #
+    # See https://github.com/github/task_list/pull/60
+    class TaskListFilter < TaskList::Filter
+      def add_css_class(node, *new_class_names)
+        if new_class_names.include?('task-list')
+          super if node.children.any? { |c| c['class'] == 'task-list-item' }
+        else
+          super
+        end
+      end
+    end
+  end
+end