Fetch or fallback for Rails ViewComponent

application_component.rb

# frozen_string_literal: true

class ApplicationComponent < ViewComponent::Base
  private

  # Reference: https://www.youtube.com/watch?v=YVYRus_2KZM&t=302s
  def fetch_or_fallback(allowed_values, given_value, fallback)
    if allowed_values.include?(given_value)
      given_value
    else
      if Rails.env.development?
        raise ArgumentError.new(
          "Value '#{given_value}' for #{self.class.name} is not allowed. " \
          "Allowed values include: #{allowed_values}"
        )
      end

      fallback
    end
  end
end

Source: https://www.youtube.com/watch?v=YVYRus_2KZM&t=302s