typescript CV-4.ts

Posted 2021-05-20

  ngOnInit() {
    this.form = new FormGroup({
      optionA: new FormControl(false),
      optionB: new FormControl(false),
      optionBExtra: new FormControl({ disabled: true, value: '' }, 
                   [Validators.required, Validators.minLength(5)])
    });

    this.optionB.valueChanges.subscribe(checked => {
      checked ? this.optionBExtra.enable() : this.optionBExtra.disable()
    });
  }