title: PrimeNg p-inputnumber cannot be styled
body: <p>I am getting stuck trying to implement the PrimeNg Inputnumber element: <a href="https://www.primefaces.org/primeng/showcase/#/inputnumber" rel="nofollow noreferrer">https://www.primefaces.org/primeng/showcase/#/inputnumber</a></p>
  <p>As per its documentation, there are a couple of attributes that can be used to style the input element, most notably styleClass and inputStyleClass. Unfortunately, neither of them work but rather they get completely ignored.</p>
  <p>component.html:</p>
  <pre><code>&lt;p-inputNumber 
    inputStyleClass=&quot;form-control-inputnumber&quot; [(ngModel)]=&quot;subwinFld.orderAdd.doubleVal&quot;&gt;
  &lt;/p-inputNumber&gt;
  </code></pre>
  <p>Global styles.css</p>
  <pre><code>.form-control-inputnumber {
    background:red;
    width: 100%;
  }
  </code></pre>
  <p>I have used and successfully styled other primeNg elements before, using the exact same strategy, for example the p-calendar element. However, here it completely ignores the attribute.</p>
  <p>What am I doing wrong?</p>
  <p><a href="https://i.stack.imgur.com/Y8Rvw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Y8Rvw.png" alt="Screenshot" /></a></p>