post cavas images to comment facebook using javascript sdk

$.getScript('//connect.facebook.net/en_UK/all.js', function () {
                FB.api(
                    "/1546036342324515/comments/",
                    "POST",
                    {
                        'source': canvas,
                    },
                    function (response) {
                      if (response && !response.error) {
                        console.log("posted");
                      }
                      else{
                        console.log(response);
                      }
                    }
                );
            });

i want to post html5 canvas to comment's facebook via javascript sdk. but my code is not work. do you have solutions?