VF page inside a lightning component - Issue with Visualforce Remoting: Javascript proxies were not generated for controller

Question

I have embed existing legacy VF page inside a lightning component. In this page I am calling a remote method onload event for window. Here we are getting following error:

"Visualforce Remoting: Javascript proxies were not generated for controller abc: may not use public remoted methods inside an iframe."

If I declare all remote actions global this error resolved. But I don't want to go with this approach as solution because, to make all remote actions global I need to make classes as global also.

Is there any other way/approach to resolve this issue?

Answer 1

The potential solutions are as follows.

apex:page action

You can use a page action to do something when the page loads.

Inline JSON

You can communicate values to the page by using a getter:

var pageData = {!config};

...

public String getConfig() {
  return JSON.serialize(...);
}

apex:commandLink, apex:actionFunction, etc

You can use any of the Visualforce components that have an action parameter. Check the documentation for more information.

@RemoteAction, webservice, etc

The class and appropriate methods must be global in this situation. There's no way around this restriction.

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Ultimately, the solution depends on the reason why you're calling an onload method. You will need to make some alteration to the code, but exactly what that change is will depend on what the function does.