patchValue with { emitEvent: false } triggers valueChanges on Angular 4 formgroup
Try adding onlySelf: true along with the emitEvent: false in this way:
this.ticketForm.patchValue(ticket, {emitEvent: false, onlySelf: true});
Can't comment because of rep, so I will post it as an answer to @Craig Wayne.
emitEvent:false works only if you are listening to value changes on the form control with:
this.form.valueChanges.controlName.subscribe(val => doSomething(val));if you are binding to model changes on the element event is emitted regardless:
<input (ngModelChange)="doSomething($event)"/>
While working with Angular 9.1.13 I had been facing the same problem.Tried to use the FormControl.setValue, and FormGroup.patchValue APIs, using also the suggested params {emitEvent: false, onlySelf: true} in all possible combinations.The valueChanges observable is was still being triggered.
The only thing that worked for me eventually was :
myForm.disable();myForm.patchValue({myControl: ''}, {onlySelf: true, emitEvent: false});myForm.enable();