角度5 ngSubmit@Output开火两次

// ...

@Output() submit: EventEmitter < any > = new EventEmitter();

// ...

onFilterSubmit($event): void {
  this.submit.emit($event);
  this.formData = {
    minDate: new Date().toISOString(),
    maxDate: new Date().toISOString()
  };
}

<form (ngSubmit)="onFilterSubmit(formData)">

    <!-- -- -->
    <button mat-button
        mat-raised-button
        [disabled]="reqsForm.form.invalid" 
        type="submit"
        color="primary">
        {{labels.submit}}
    </button>
</form>

// ...

onFilterSubmit($event): void {
  console.info("FORM SUBMIT", $event);
}

<custom-component (submit)="onFilterSubmit($event)">

  <!-- -- -->

</custom-component>