## Full example

    // Source: https://github.com/microsoft/AL/blob/master/samples/ControlAddIn/al/Page/CustomerCardAddIn.al

    pageextension 50300 CustomerCardAddIn extends "Customer Card"
    {
    	layout
    	{
    		addafter(Blocked)
    		{
    			usercontrol(ControlName; TestAddIn)
    			{
    				ApplicationArea = All;

    				trigger Callback(i : integer; s: text; d : decimal; c : char)
    				begin
    					Message('Got from js: %1, %2, %3, %4', i, s, d, c);
    				end;
    			}
    		}
    	}

    	actions
    	{
    		addafter(Approve)
    		{
    			action(CallJavaScript)
    			{
    				ApplicationArea = All;

    				trigger OnAction();
    				begin
    					CurrPage.ControlName.CallJavaScript(5, 'text', 6.3, 'c');
    				end;
    			}

    			action(CallViaCodeunit)
    			{
    				ApplicationArea = All;

    				trigger OnAction();
    				var c : Codeunit AddInHelpers;
    				begin
    					c.CallJavaScript(CurrPage.ControlName);
    				end;
    			}

    			action(CallStaleControlAddIn)
    			{
    				ApplicationArea = All;

    				trigger OnAction();
    				var c : Codeunit AddInHelpersSingleton;
    				begin
    					c.CallStaleAddInMethod();
    					Message('Probably nothing should happen...');
    				end;
    			}
    		}
    	}
    }