angular input by value code example

Example 1: how to make input in angular optional

export class ChildComponent {

    @Input() showName?: boolean;

    constructor() { }

}

Example 2: input property angular

//passing properties to child elements
<app-slider [title]="'This is a title'"> </app-slider>

//inside the component slider i add just before the constructor :
.
.
@input() title: string;
constructor(){
}


//after this we can use these new property inside the .html file of the component
<div id='slider' class='slider-big'>
  <h1> {{title}}</h1>

</div>

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