Communicating with other components

We realized the form, and now the customer can search for hotels; clicking on the search button will send a request to the backend, and we will use the result inside other components.

We need a way to enable communication between components without the need for direct referencing each other.

In the next chapter, we will look at the concept of Publish/Subscribe, but now we will go with a simple Event Manager module (following the Mediator design pattern).

When you got the files for the communication with the backend, you download BookingOnline/app/services/eventManager.js.

This module exposes three functions:

• function on (event name, callback): use it to listen for named event
• function off (event name, callback): use it to stop current listening for a named event
• function trigger (event name, parameters): use it to send a message to the listeners

If you check the rest.js module, you will find there a function named getHotelByDestination. At the end of the function...