Angular 4/5 Form Group Validation : <p>I have a reactive form set up on my Angular app but I am trying to figure out if Angular 4/5 has a way to check if an input with a formControlName directive is valid or not.</p>

<p>I don't want to check if the whole form is valid - i know how to do this. I have a stepper process form and I want to disable the next button if it is invalid. </p>

<p>i.e. is there something like this for <strong>form controls</strong> and not just form groups?:</p>

<pre><code>[disabled]="!formGroup.valid"
</code></pre>
