I am trying to setup a basic form validation for a select.

In my constructor I have the following FormGroup

this.formSubmission = new FormGroup(
  {
    triggers: new FormControl(['', [ Validators.required]])
  }
)

I have a button on the screen to test the validity of the FormGroup and it always comes back as valid even when there is nothing selected for "triggers".

When clicked the following code executes:

console.log('FormGroup Status: ' + this.formSubmission.status)

This will return VALID.

The HTML portion of this can be found here:

<div [formGroup]="formSubmission">
  <mat-form-field appearance="fill">
    <mat-label>Triggers</mat-label>
    <mat-select 
    formControlName="triggers" multiple
    >
      <mat-option *ngFor="let trigger of triggersList" [value]="trigger.TRIGGER_NAME">{{trigger.TRIGGER_NAME}}</mat-option>
    </mat-select>
  </mat-form-field>
</div>