Angular 8 @viewChild with read paremeter

 https://stackoverflow.com/questions/32693061/how-can-i-select-an-element-in-a-component-template/35209681#35209681

@viewChild without read parameters means to access the component or HTML in template thats already rendered

<input #myname>

@ViewChild('myname') input; 

element

ngAfterViewInit() {
  console.log(this.input.nativeElement.value);
}

@viewChild with read parameters means to dynamically create component on a already rendered page

@ViewChild('myname', { read: ViewContainerRef }) target;

target.createComponent(
                this.resolver.resolveComponentFactory(
                    Yourcomponent
                )
            );