Hello , i have two blocks in a d3 funnel and i need to bind click event so that i know which block is clicked.How do i do that? I tried this but it didnt work:

   \koolreport\d3\FunnelChart::create([
            "dataSource"=>array(
                array("category"=>"Visit","amount"=>50000),
                array("category"=>"Download","amount"=>0)
            ),
            "width"=>420,
            "columns"=>[
                "category",
                "amount"
            ],
            "chart"=>array(
                'bottomWidth'=>0.4,
            ),
            "events"=>
            array(
                "click"=>[
                    "block"=>
                    [
                       "callback"=> function(data){
                                console.log("data");
                            }
                        ]
                ]
            )

Thanks