angularjs - angular.js boradcast error: $rootScope.broadcast is not a function -

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i adding items dynamically array of items , let directive know there new items. inside controller function additem() trying following:

settimeout(function(){     $rootscope.broadcast("itemadded");     // tried: $scope.broadcast("itemadded"); isn't working });

problem: i'm getting error:

$rootscope.broadcast not function

any clues? happy post more code if need more information.

its typo :

$rootscope.$broadcast(name, args)

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