Learning Salesforce Lightning Application Development

Handling application events

The component handling the event should have the following code in the markup:

<aura:handler event="c:appEvent" action="{!c.handleApplicationEvent}"/>

Note that we have used the event type as the event filename, prefixed with the namespace and a colon (:). Also, there is an action attribute to invoke the controller action, once the event is handled.

The handler for an application event won't work if you set the name attribute in <aura:handler>. Use the name attribute only when you're handling component events.