alue : </i><code>computed((): boolean &#x3D;&gt; {
      return this.errorMessage() !&#x3D; null &amp;&amp; this.errorMessage() !&#x3D; &#x27;&#x27; &amp;&amp; this.errorMessage() !&#x3D; undefined;
    })</code>
                    </td>
                </tr>
                        <tr>
                            <td class="col-md-4">
                                <div class="io-line">Inherited from         <code><a href="../components/UIBaseComponent.html" target="_self" >UIBaseComponent</a></code>
</