perty tsd-parent-kind-interface">
					<a name="onerror" class="tsd-anchor"></a>
					<h3><span class="tsd-flag ts-flagOptional">Optional</span> on<wbr>Error</h3>
					<div class="tsd-signature tsd-kind-icon">on<wbr>Error<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-symbol">(</span>errors<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">unknown</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> =&gt; </span><span class="ts