void_elements.rb in phlex-1.4.0

- old
+ new

@@ -1,9 +1,11 @@
 # frozen_string_literal: true
 
 module Phlex::HTML::VoidElements
 	extend Phlex::Elements
 
+	REGISTERED_ELEMENTS = Concurrent::Map.new
+
 	# @!method area(**attributes, &content)
 	# 	Outputs an <code>area</code> tag
 	# 	@return [nil]
 	# 	@see https://developer.mozilla.org/docs/Web/HTML/Element/area
 	register_void_element :area, tag: "area"