<div class="form-group custom-input-overlap">
<select class="form-control custom-select" (change)="change($event)" [ngClass]="{'filledTxt': selectedItem.length > 0}">
<option value="" selected disabled>{{labelStr}}</option>
<option *ngFor="let item of titleData" [value]="item.lovId.lovId" [selected]="item.lovId.lovId == selectedItem" >{{ item.lovValue }}</option>
</select>
<label for="labelStr" style="left:25px;">{{labelStr}}</label>
</div>

import { Component, ChangeDetectionStrategy, ChangeDetectorRef, Input, forwardRef } from '@angular/core';
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
@Component({
selector: 'app-custom-select',
templateUrl: './custom-select.component.html',
changeDetection: ChangeDetectionStrategy.OnPush,
providers: [
{ 
provide: NG_VALUE_ACCESSOR,
useExisting: forwardRef(() => CustomSelectComponent),
multi: true
}
]
})
export class CustomSelectComponent implements ControlValueAccessor {
selectedItems = [];
@Input() labelStr:string;
@Input() groupID:string;
@Input() selectedItem:string;
private propagateOnChange = (value: {lovId, lovValue}[]) => {};
private propagateTouched = (value: {lovId, lovValue}[]) => {};
titleData = [
{
"lovId":{"lang":"EN","lovId":"1"},
"lovValue":"Mr"
},
{ 
"lovId":{"lang":"EN","lovId":"2"},
"lovValue":"Mrs"
},
{
"lovId":{"lang":"EN","lovId":"3"},
"lovValue":"Dr"
},
{
"lovId":{"lang":"EN","lovId":"5"},
"lovValue":"Miss"
}
]
constructor(
private cdRef: ChangeDetectorRef
) { 
console.log("seletced Item = "+this.selectedItem+" groupID = "+this.groupID)
}
writeValue(items: {lovId, lovValue}[]) {
this.selectedItems = items;
}
registerOnChange(fn) {
this.propagateOnChange = fn;
}
registerOnTouched(fn) {
this.propagateTouched = fn;
}
change(e) {
this.selectedItem = e.target.options[e.target.options.selectedIndex].value;
console.log("selected Item = "+this.selectedItem)
}
}

<form [formGroup]="ccnForm" (ngSubmit)="onSubmit()">
<div class="row">
<div class="col-md-5 offset-md-1">
<app-custom-select formControlName="projectType" labelStr="Project type" groupID="CM_GENDER" selectedItem="3" ></app-custom-select>
</div>
</div>
</form>

import { Component, OnInit } from '@angular/core'; import { FormGroup, FormBuilder, AbstractControl, Validators } from '@angular/forms';
@Component({   selector: 'app-ccn-request',   templateUrl: './ccn-request.component.html',   styleUrls: ['./ccn-request.component.css'] }) export class CcnRequestComponent {
ccnForm: FormGroup;
constructor(
private fb: FormBuilder   ) {
this.ccnForm = this.fb.group({
projectType: ['', (c: AbstractControl) => {
return c.value && c.value.length && c.value.length > 1 ? null : { test: true }
}]
});
this.ccnForm.valueChanges.subscribe(console.log);   }
get ccnFormControl(){ return this.ccnForm.controls; }
onSubmit(){
console.log("Project Name = "+this.ccnFormControl.projectType.value)   }
}

change(e) {
this.selectedItem = e.target.options[e.target.options.selectedIndex].value;
console.log("selected Item = "+this.selectedItem)
this.propagateOnChange({selectedItem: this.selectedItem});
}

 this.ccnForm.controls.projectType.valueChanges
.subscribe(selectedItem => {        
// Do something here with your selected item
this.selectedItem = selectedItem;
});