Per conoscere se siamo su mobile o desktop, tablet etc…
<aura:if isTrue="{!$Browser.formFactor == 'DESKTOP'}">
<p>You are using Desktop <lightning:icon iconName="utility:desktop" alternativeText="Desktop!" variant="error"/> Browser </p>
</aura:if>
<aura:if isTrue="{!$Browser.formFactor == 'PHONE' || $Browser.isPhone}">
<p>You are using Desktop <lightning:icon iconName="utility:phone_portrait" alternativeText="Phone!" variant="error"/> Browser </p>
</aura:if>
<aura:if isTrue="{!$Browser.formFactor == 'TABLET ' || $Browser.isTablet}">
<p>You are using Tablet <lightning:icon iconName="utility:tablet_portrait" alternativeText="Tablet!" variant="error"/> Browser </p>
</aura:if>
<aura:if isTrue="{!$Browser.isIPad || $Browser.isTablet}">
<p>You are using IPad <lightning:icon iconName="utility:tablet_portrait" alternativeText="Tablet!" variant="error"/> Browser </p>
</aura:if>
<aura:if isTrue="{!$Browser.isIPhone}">
<p>You are using IPhone <lightning:icon iconName="utility:phone_portrait" alternativeText="Tablet!" variant="error"/> Browser </p>
</aura:if>
<aura:if isTrue="{!$Browser.isAndroid || $Browser.isPhone}">
<p>You are using Android phone <lightning:icon iconName="utility:phone_portrait" alternativeText="Tablet!" variant="error"/> Browser </p>
</aura:if>