What is the Use of Aura:method tag in Salesforce?

In our last post we talk about Lightning Component Event for Component communication. In this post we will talk about how to do component communication with the help of <aura:method > . Aura:Method enables you to directly call a method in a component’s client-side controller instead of firing / handling a component event. With the help of  <aura:method > we can call child component method from parent component.

Syntax :-

How to call method :- Simply call the function and pass parameter value in parent component

component.sampleMethod(arg1);

How to declare method :- Declare the aura:method with attribute

<aura:method name="sampleMethod" action="{!c.callAction}" description="Sample">
<aura:attribute name="param1" type="String" default="param1"/>
</aura:method>

Aura Method Action :- get the Aura:Attribute value with event.getParam('arguments');
({
callAction: function(cmp, event) {
var params = event.getParam('arguments');
if (params) {
var p1 = params.param1;
// add your code here
}
}
})