input-disable.directive.ts

import {
    Component,
    Directive,
    Renderer2,
    ElementRef,
    NgModule,
    Input,
    Output,
    EventEmitter,
    AfterContentInit,
    OnInit
} from '@angular/core';
import { MatFormFieldControl } from '@angular/material';
import { AboutComponent } from '@app/about/about.component';
import { NgControl } from '@angular/forms';



@Directive({
  selector: "[inputDisable]",
  providers: []
})
export class InputDisableDirective implements AfterContentInit, OnInit {
  @Input() inputDisable: string[]
  constructor(private el: ElementRef,
              private renderer: Renderer2, private ngControl : NgControl) {
    //noinspection TypeScriptUnresolvedVariable,TypeScriptUnresolvedFunction
 
    
  }
  ngOnInit() {
  
   this.ngControl.control.disable();
  }
  ngAfterContentInit() {
   
} 
}