In This Blog We Learn About Apex Javascript Remoting
What is Javascript Remoting?
Apex Javascript Remoting In VisualForce Page is a tool that front-end developers can use to make an AJAX request from a Visualforce page directly to an Apex controller. JavaScript Remoting allows you to run asynchronous actions by decoupling the page from the controller and to perform tasks on the page without having to reload the entire page.
In addition, Javascript Remoting In VisualForce Page can help alleviate view state issues while still executing in the context of the user viewing the page. JavaScript remoting is the most efficient way of calling the controller and passing data in from the page, because you can ensure that you’re passing only the data that you need each time that you make a call.
How to use Javascript remoting in Visualforce Page
Visualforce.remoting.Manager.invokeAction(
'{!$RemoteAction.CONTROLLERNAME.Methodname}',param1,param2,
function(result, event){
console.log(result);
/*The "result" variable return data or value from your remote action method written in Apex class.*/
}
);
Controller class From which we are calling method via javascript remoting:
@RemoteAction
public static Object myRemoteMethod(String param1, String param2)
{
return param1+'-'+param2;
}
Note: parameter name should be same in apex class method and vf page
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