Custom Sass Function For stringinclude(a, b)

gistfile1.rb

module Sass::Script
  class String < Literal

    def include?(other)
      value.include? other.value
    end

  end
end

module Sass::Script::Functions
  
  def stringinclude(str, value)
    assert_type str, :String
    assert_type value, :String
    Sass::Script::Bool.new(str.include?(value))
  end
  declare :stringinclude, [:str, :value]

end