Validator in not a function in angular

I have created own directive for adding validation and removing validation based input parameters of directive. I am getting error when loading and form field value changing validator is not working the validation

@Directive({
selector:[appdirective1],
providers:[{
provide:NG_VAILDATORS,
useExisting:forwardRef(()=>directiveName)

}]
});

export class directiveName implements OnChanges,OnInit{
@Input varName1="";
@Input varName2="";
@Input callBack1)=>{}
@Input callBack2)=>{}
constructor(private _injector:Injector){
}

validate1():ValidateFn{
return (control:AbstractControl):{[key:string]:any}|null =>{
//logic here
}
}
validate2():ValidateFn{
return (control:AbstractControl):{[key:string]:any}|null =>{
const obj1=this.callBack1();
//logic here
}
}
validate3():ValidateFn{
return (control:AbstractControl):{[key:string]:any}|null =>{
const obj1=this.callBack2();
//logic here
}
}
ngOnInit(){
const control=this._injector.get(NgControl);
control.control.setValidatoers(this.validate1);
if(this.varName1 !=="" && this.varName1 !== undefined){
control.control.setValidatoers(this.validate2);
}
if(this.varName2 !=="" && this.varName2 !== undefined){
control.control.setValidatoers(this.validate3);
}
control.control.updateValueAndValidity();


}
ngOnChanges(){
const control=this._injector.get(NgControl);
if(this.varName1 !=="" && this.varName1 !== undefined){
control.control.setValidatoers(this.validate2);
}
if(this.varName2 !=="" && this.varName2 !== undefined){
control.control.setValidatoers(this.validate3);
}
control.control.updateValueAndValidity();
}
}
}


In the html file , I have added directive selectors and input paramets

<input appdirective1 name="name2" [varName1]="success" [callBack1]="method1" />

<input appdirective1 name="name3" [varName2]="success" [callBack2]="method2"/>


Already method method1 and method2 binded in component file. I need to used this file many places.

I am getting Error like :

TypeError : validator is not a function
at Forms.mjs
at Array.map(<anonymous>)
at executeValidators(forms.mjs:896:21)
at Forms.mjs
at Array.map(<anonymous>)
at executeValidators(forms.mjs:896:21)
at Formcontrol2._ComposedValidatorsFn(forms.mjs)
at Formcontrol2._runValidator(forms.mjs)
at Formcontrol2.updateValueandValidity(forms.mjs)

Continue reading...