ChristianMenzinger

<aura:application extends="force:slds">
	<aura:attribute name="listData" type="String[]" default="['First', 'Second', 'Third']" />
  <!-- HERE comes what is propoesed by performance best practices: only one click-event listener on the outer list -->
	<ul onclick="{!c.onListClick}">
		<aura:iteration items="{!v.listData}" var="data" indexVar="index">
			<li data-itemindex="{!index}">
				<lightning:icon iconName="utility:chat" size="medium" title="title" />
				Data: {!data}
			</li>
		</aura:iteration>