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Given below are the description for HostListener and HostBinding in the official angular website.
HostListener - It declares a host listener. Decorator that declares a DOM event to listen for and provides a handler method to run when that event occurs.
HostBinding- Decorator that marks a DOM property as a host-binding property and supplies configuration metadata.Angular automatically checks host property bindings during change detection and if a binding changes it updates the host element of the directive.
The role property declared with @HostBinding to host element
is binded in this example it listens to click event declared with @HostListener of the host element
