What is HostListener and HostBinding in Angular?

devquora
devquora

Posted On: Feb 22, 2018

 

HostListener in Angular is a function decorator. It accepts an event name as the argument and calls the associated function when the event gets fired on the host element.

//example 
@HostListener('mouseover') onHover() { 
  window.alert("hover"); 
} 

Here, when you hover the mouse on the host element, an alert popup will be triggered.

HostBinding is used to bind the input properties in the host element to the directive. With the HostBinding decorator, a directive can link internal property to the input property of the host element. When the internal property is changed, the input property of the host element will change too.

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