Learning Salesforce Lightning Application Development

Exploring the $A.Util APIs

The following table shows supported Util functions:

Util Class	Description	Example Code
addClass (Object elementString newClass)	Adds a CSS class to a component.	var myCmp = component.find("myCmp"); $A.util.addClass(myCmp, "myClass");
getBooleanValue (object val): Boolean	Coerces truthy and falsy values into native Booleans.
hasClass (Object elementString className): Boolean	Checks whether the component has the specified CSS class.	//find a component with aura:id="myCmp" in markup var myCmp = component.find("myCmp"); $A.util.hasClass(myCmp, "myClass");
isArray (Object obj): Boolean	Checks whether the specified object is an array.
isEmpty (Object obj): Boolean	Checks whether the object is ...