my-custom-input.component.ts

import {
          Component, 
          Input, 
          ContentChild, 
          AfterContentInit 
        } 
from '@angular/core';

@Component({
  selector: 'my-custom-input',
  templateUrl: 'src/my-custom-input.component.html',
  styleUrls:['src/my-custom-input.component.css']
})
export class MyCustomInput implements AfterContentInit {
  
  @Input() label;
  
  @ContentChild('input')
  injectedInput: HTMLInputElement;
   
   ngAfterContentInit(){
        console.log('Injected Input Reference: ', this.injectedInput);
   }

  constructor() {
    
  }
}