Lightning Components Developer’s Guide

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Creating Server-Side Logic with Controllers

The framework supports client-side and server-side controllers. An event is always wired to a client-side controller action, which can in turn call a server-side controller action. For example, a client-side controller might handle an event and call a server-side controller action to persist a record.

Server-side actions need to make a round trip, from the client to the server and back again, so they are usually completed more slowly than client-side actions.

For more details on the process of calling a server-side action, see Calling a Server-Side Action.