范围更改时如何显示模板[Angular指令]

Here is my directive:

这是我的指示：

function ajaxMessageData()
{
    var ajaxMessage = {
        link: link,
        restrict: "EA",
        template: "success",
        scope: {
            success: '='
        }
    };

    return ajaxMessage;

    function link(scope, elm, attrs)
    {

            console.log(scope.success);
            scope.$watch(attrs.success, function (newValue) {
                console.log("Changed to " + newValue);
            });

    }
}
function ajax