Passing arguments to nested directives in Angular - angularjs

Question

I am trying to pass arguments from a parent directive to a child directive but the arguments seem to be undefined. Is there a right way to do this?
}).directive('flipper', function ($timeout) {
return {
template: '<div class="flipper" ng-class="{big: big}"><div class="inner animated " ng-style="rotatorTop()"><ul><li ng-repeat="app in apps">{{app.name}}</li></ul></div></div>',
restrict: 'E',
replace: false,
scope: {
apps: "=",
big: "=",
sizes: "="
},
link: function ($scope, $element, $attrs) {
// undefined!
alert($scope.apps);
...
}
};
}).directive('slogan', function ($window) {
return {
template: '<div class="message"><div class="message-big"><div class="black">{{lines[0]}}<flipper apps="apps" class="big" sizes="flipperSize"></flipper>' +
'</div><div class="black">{{lines[1]}}</div><div class="black">{{lines[2]}}</div></div></div>',
restrict: 'E',
replace: false,
transclude: true,
scope: {
apps: "=",
lines: "="
},
link: function ($scope, $element, $attrs) {
...
}
};
});

Answer 1

Yes there is. As your code is quite incomplete, I've made this simple directive to demonstrate how you can pass values from the controller to a parent directive and a child directive.
myApp.directive('cdParent', function() {
return {
restrict: "AE",
template: "<div cd-child option=\"option\" text=\"text\">",
scope: {
option: "="
},
link: function(scope, elem, attrs) {
console.log("inside parent directive: " + scope.option); // will log the color for the controller
scope.text = "Hello nested directives";
}
}
});
myApp.directive('cdChild', function() {
return {
restrict: "AE",
template: "<pre style=\"color: {{option}}\">{{text}} ({{option}})</pre>",
scope: {
option: "=",
text: "="
},
link: function(scope, elem, attrs) {
console.log("inside child directive: " + scope.option);
}
}
});
also, the link function doesn't do dependency injection as a controller does, so it's arguments should be scope, element, attrs not $scope, $element, $attrs, argument order makes a difference here