permissions_policy

Overrides parts of the globally configured Feature-Policy header:

class PagesController < ApplicationController
  permissions_policy do |policy|
    policy.geolocation "https://example.com"
  end
end

Options can be passed similar to before_action. For example, pass only: :index to override the header on the index action only:

class PagesController < ApplicationController
  permissions_policy(only: :index) do |policy|
    policy.camera :self
  end
end