How do I call an Apex class from Aura component?

Aura: How to call an Apex method from Lightning javascript... Create the Apex class. Note the following pointers. The method to be executed from your lightning component has to be annotated with @AuraEnabled. Declare your apex class in your lightning component. Call your apex method from your Javascript.

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What is Handler in lightning component?

in lightning component is used for handle standard and custom events. we can create our custom lightning event and also use standard events, standard lightning event is automatically fired when related event is fire. What is bubble and capture phase in lightning? Bubble. The component that fired the event can handle it. The event then bubbles up from the source component to the application root. Capture phase-The framework executes the capture phase from the application root to the source component until all components are traversed.

What is bound and unbound expression in lightning?

When you use a bound expression, a change in the attribute in the parent or child component triggers the change handler in both components. When you use an unbound expression, the change is not propagated between components so the change handler is only triggered in the component that contains the changed attribute. Then, what is visualforce in salesforce? Visualforce is a component-based user interface (UI) framework that enables the creation of dynamic, reusable interfaces. The Visualforce framework is part of Salesforce's Force.com Platform as a Service (PaaS) offering, which is designed to simplify the development and deployment of cloud applications and websites.

What is Apex in Salesforce?

Apex is a strongly typed, object-oriented programming language that allows developers to execute flow and transaction control statements on Salesforce servers in conjunction with calls to the API. Apex code can be initiated by Web service requests and from triggers on objects.