Chapter 4 User InterfaCe DesIgn achieved using a broadcast observable design pattern to ensure smooth communication between different components. A broadcast enables you to capture and handle events triggered in one component and actions performed in another component. Figure 4-5. Communication between presentation components Hooks Hooks are created so that flexibility of work can be maintained between front-end and back-end developers. Hooks are defined services from which back-end integration takes place using REST service calls. A hook itself does no processing—it just calls the hook’s implementation, passes the data, and accepts data back from the implementation. This allows exchange of data between back-end and front-end applications. A hook has been defined in the service files to handle data coming from the back-end, and vice-a-versa. When the developer implements a REST service, then the hook data points will be replaced by actual REST service endpoints. Development Process A DXP provides a simplified and structured UI development approach. Figure 4-6 outlines the UI development processes. 127