Retrieving lightning component tips
How to get Lightning Button label?
<lightning:button label="Get Label" onclick="{!c.getLabel}" aura:id="button1" />
<aura:attribute name="buttonLabel" aura:id="btn1" type="String"/>
var BtnLabelWay1 = event.getSource().get("v.label"); -- Used when any Action event occurs, ex: onClick
var BtnLabelWay2 = component.find("button1").get("v.label"); -- Can use when auraID exist...
