What is use for Host Listener in Angular?

Question

Every angular project is required for Redux ? or only required for large applications.

Answer 1

Host Listener is used for event handling.
Declares a host listener.Angular will invoke the decorated method when the host element emits the specified event.
HostListener - will listen to the event emitted by host element, declared with @HostListener.

Syntax

@HostListener({ 
  eventName?: string
  args?: string[]
})