Function Type

An attribute of an aura:method can have a type corresponding to a JavaScript function so that you can pass a function into the method. An attribute of a component can’t have a type corresponding to a JavaScript function.

For an example of using a function type with aura:method, see Return Result for Asynchronous Code.

Don’t send attributes with type="Function" to the server. These attributes are intended to only be used on the client side.

The most robust way to communicate between components is to use an event. If you get an error in a component with an attribute of type Function, fire an event in the child component instead and handle it in the parent component.

Note