show the number of attachments in account custom field

Hello I am using the Search input from the lightning input components.
<div onkeyup="{! c.handleKeyUp }"> <lightning:input aura:id="enter-search" name="enter-search" label="Search when user hits the 'enter' key" type="search" />

When I am implementing it this is fine, the problem i am having is how would i clear the contents or have a event fire when you click the "Clear Icon" that is built in the component. 
 

Hi all,

 

Wondered where would be the best place to test SOQL queries? I need to run some simple queries such as below [Select u.Contact.AccountId From User u where id = :uid and contactid != null]; and need to see the return results...

 

Many thanks,