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