lib/temple/html/attribute_remover.rb
# frozen_string_literal: true module Temple module HTML # This filter removes empty attributes # @api public class AttributeRemover < Filter define_options remove_empty_attrs: %w(id class) def initialize(opts = {}) super raise ArgumentError, "Option :remove_empty_attrs must be an Array of Strings" unless Array === options[:remove_empty_attrs] && options[:remove_empty_attrs].all? {|a| String === a } end def on_html_attrs(*attrs) [:multi, *attrs.map {|attr| compile(attr) }] end def on_html_attr(name, value) return super unless options[:remove_empty_attrs].include?(name.to_s) if empty_exp?(value) value elsif contains_nonempty_static?(value) [:html, :attr, name, value] else tmp = unique_name [:multi, [:capture, tmp, compile(value)], [:if, "!#{tmp}.empty?", [:html, :attr, name, [:dynamic, tmp]]]] end end end end end