helpers-with-injections

-helpers-with-injections.js

// Helper that has the router service injected as the first parameter. Benefits:
//
// 1. Still stateless, all state is owned by the service, so no possibility of bugs due to statefulness of the instance
// 2. Much easier to write, less boilerplate
// 3. Subjectively easier to read
//
function routeActive(router, [routeName]) {
  return router.isActive(routeName); 
}

export default helper(
  { services: ['router'] },
  routeActive
);

decorated-helpers-with-injections.js

// Possible future API with decorators
@helper
export default routeActive(
  @service router, 
  [routeName]
) {
  return router.isActive(routeName); 
}