PrimeNG calendar bug when applying css class from bootstrap
<p>I have this strange bug where I use PrimeNG to display a DatePicker in my application. When I try to use bootstrap's <code>form-control</code>, I get a visual bug.</p>

<p>Here is my template:</p>

<pre><code>&lt;div class="form-group row"&gt;
    &lt;div class="form-group col-md-2"&gt;
        &lt;label for="valeur"&gt;Valeur&lt;/label&gt;
        &lt;input type="number" id="valeur" class="form-control" /&gt;
    &lt;/div&gt;

    &lt;div class="form-group col-md-5"&gt;
        &lt;label for="dateDebut"&gt;Date de début&lt;/label&gt;
        &lt;p-calendar id="dateDebut" dateFormat="dd/mm/yy" styleClass="form-control" [showIcon]="true"&gt;&lt;/p-calendar&gt;
    &lt;/div&gt;

    &lt;div class="form-group col-md-5"&gt;
        &lt;label for="dateFin"&gt;Date de fin&lt;/label&gt;
        &lt;p-calendar id="dateFin" dateFormat="dd/mm/yy" styleClass="form-control" [showIcon]="true"&gt;&lt;/p-calendar&gt;
    &lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>This is the result:</p>

<p><a href="https://i.stack.imgur.com/4uGAp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/4uGAp.png" alt="enter image description here"></a></p>

<p><strong>EDIT</strong></p>

<p>If it's of any help, here is the generated HTML:</p>

<pre><code>&lt;div class="form-group col-md-5" _ngcontent-scp-1=""&gt;
   &lt;label for="dateDebut" _ngcontent-scp-1=""&gt;Date de début&lt;/label&gt;
   &lt;p-calendar ng-reflect-show-icon="true" ng-reflect-date-format="dd/mm/yy" ng-reflect-style-class="form-control" styleclass="form-control" id="dateDebut" dateformat="dd/mm/yy" _ngcontent-scp-1=""&gt;
      &lt;!--template bindings={
         "ng-reflect-ng-if": "true"
         }--&gt;
      &lt;span ng-reflect-initial-classes="form-control" class="form-control ui-calendar" ng-reflect-raw-class="ui-calendar"&gt;
         &lt;input id="dp1467976345328" ng-reflect-value="" class="hasDatepicker ui-inputtext ui-widget ui-state-default ui-corner-left" ng-reflect-raw-class="[object Object]" type="text"&gt;&lt;!--template bindings={
            "ng-reflect-ng-if": "true"
            }--&gt;&lt;button ng-reflect-icon="fa-calendar" type="button" pbutton="" class="ui-datepicker-trigger ui-button ui-widget ui-state-default ui-corner-all ui-button-icon-only"&gt;&lt;span class="ui-button-icon-left ui-c fa fa-fw fa-calendar"&gt;&lt;/span&gt;&lt;span class="ui-button-text ui-c"&gt;ui-button&lt;/span&gt;&lt;/button&gt;
      &lt;/span&gt;
      &lt;!--template bindings={
         "ng-reflect-ng-if": "false"
         }--&gt;
   &lt;/p-calendar&gt;
&lt;/div&gt;
</code></pre>