html :
<div ng-app="appMod">
<div task-info>{ { data.name } }</div>
</div>
script :
var appmod = angular.module('appMod', []);
appmod.directive("taskInfo", function () {
return {
restrict: 'A',
scope: {},
link: function ($scope, $element, attr) {
$scope.taskdat = '{"name":"Task name","status":"Completed"}';
$scope.data = JSON.parse($scope.taskdat);
scope = $scope; //scope data
},
};
});
is it possible to bind directive scope without having controller scope in Angular Js? If yes, please give me some solution examples.
You don't need a controller scope for writing a directive , see this fiddle.
Here, there is no controller scope, and the value hero is bound within the directive as:
myApp.directive('myDirective', function() {
return {
restrict: 'EAC',
link: function($scope, element, attrs, controller) {
var controllerOptions, options;
$scope.hero='superhero'
}
};
});
Works fine :)
Also the example you provided is similar, but you just need to remove scope from returned JSON object(from directive), as it is being defined as $scope inside the link fucntion.
see : http://jsfiddle.net/bg0L80Lx/
controller option ?
.directive('mydirective', function() {
return {
restrict: 'A', // always required
//controller: 'SomeController'
template:'<b>{{status}}</b>',
controller:'YourCtrl'
}
})
Related
I've created a directive which I called my-tree, and I'm calling this directive from a view exemple-tree-view.html as following:
<my-tree ng-model="sampleTreeView.listNoeuds" ... />
this view's controller called sampleTreeView.
In my directive's link function I have a function that returns some data, which I affect to scope variable declared in the directive's controller, as following :
function linkFn(scope, element, attrs) {
//some code
scope.createNode = function ($event) {
var sel = $(element).jstree(true).create_node($($event.currentTarget)[0].closest('.jstree-node').id);
if (sel) {
$(element).jstree(true).edit(sel, '', function (node, success, cancelled) {
scope.treeActionsResult.createdNode = node;
});
}
};
//some code
}
My question is how can I get the scope.treeActionsResult.createdNode value in the sampleTreeView controller, since it's the controller for the exemple-tree-view.html where I call my directive.
You can use shared scope between the directive and controller by removing the scope property
like in this example:
MyApp.directive('studentDirective', function () {
return {
template: "{{student.name}} is {{student.age}} years old !!",
replace: true,
restrict: 'E',
controller: function ($scope) {
console.log($scope);
}
}
});
Still you have the $scope object, but in this case the scope object is shared with parent controller's scope.
You can read more about it fron the following link
Understanding Scope in AngularJs Custom Directive
If you don't create isolated scope for your directive then you can access directive scope values from your controller. like bellow
your controller and directive:
app.controller('MainCtrl', function($scope) {
$scope.value = 1;
});
app.directive('myTree', function() {
return {
restrict: 'AE',
link: function(scope, element, attrs) {
scope.values = {};
scope.values.price = 1234;
}
};
});
then use in your html like:
<body ng-controller="MainCtrl">
<p>value {{values.price}}</p>
<my-tree att="{{attValue}}"></my-tree>
</body>
here values.price shown from directive in MainCtrl
Hi I am working on angularjs. I am facing an issue in directive.
I have set the scope.user.name="amin shah" on link/click event
and want to access this in controller how is this possible?
var dataSourceDirective = angular.module('mydirective', []);
dataSourceDirective.directive('dir', function () {
return {
restrict: 'C',
scope: true,
link: function ($scope, element, attrs) {
element.bind('click', function () {
$scope.user.name ="amin shah";
$scope.$apply();
$('.sourceType_panel').hide();
$('#sourceType_1_panel').show();
});
}
}
});
controller code
$scope.demo = function () {
console.log($scope.user);`
},
You need to create Isolated scope in your directive.
The given controller should be parent of this directive.
var dataSourceDirective = angular.module('mydirective', []);
dataSourceDirective.directive('dir', function () {
return {
restrict: 'C',
scope: {user:"=user"},
link: function ($scope, element, attrs) {
element.bind('click', function () {
$scope.user.name ="amin shah";
});
}
}
});
In html :
<div ng-copntroller='yourCtrl'>
<dir user="user"></dir>
</div>
In Controller you should initialize the user.
OR
you use $broadcast & $emit if the parent is controller.
Withing link function of directive you can use $rootScope.$emit('user_name_update',user);
And in the controller you can listen this event
$scope.$on('user_name_update',function(data){
console.log(user) // its should give your updated `user` object
})
First of all you should correct your link method and I think you shouldn't need child sope at there. So you should delete your scope bind in directive too. You can reach parent scope with link method.
app.directive('dir', function () {
return {
restrict: 'E',
link: function (scope, element, attrs) {
element.bind('click', function () {
scope.user.name ="amin shah";
scope.$apply();
});
}
}
});
and in your controller you can define scope variable like that:
app.controller('MainCtrl', function($scope) {
$scope.user = {
name: ''
}
});
also you should add this directive to HTML :
<dir>Element</dir>
<p>{{user.name}}</p>
here is the working plunkr you should click Element than you can see your name from directive but in parent scope
https://plnkr.co/edit/umTdfukZ22hARoLjxdL3?p=preview
I've written my own directive from which I want to call a method on the parent ng-controller. I've tried doing that by adding require:'ngController' in my directive. However the returned controller is just an empty object. I'm running 1.4.8.
<div ng-controller="myController">
<div my-directive></div>
</div>
app.directive('myDirective', function() {
return {
restrict: 'A',
scope: false,
require: '^ngController',
link: function (scope, $element, attrs, controller) {
//controller is empty object..
};
}
});
Update: My misstake was that I added a method to the controllers scope when I should add it directly to the controller instead.
app.controller('myController', function($scope) {
$scope.myMethod = function() {}; //Not callable from controller passed to directive
this.myMethod = function() {}; //IS callable from controller passed to directive
});
You can call the parent controller via scope if your directive doesn't have an isolated scope, and you don't need to require ngController.
angular.module('app', [])
.controller('controller', function($scope) {
$scope.greet = function() {
return 'hi'
};
})
.directive('testDirective', function() {
return {
restrict: 'E',
template: '<h1>{{ greet() }}</h1>'
};
});
Output:
hi
Plnkr: http://plnkr.co/edit/uGXC5i1GjphcZCPDytDG?p=preview
The function needs to be available in the directive's scope. So if your directive is in the scope of the controller it is:
scope.fn();
Using directives I ended stuck when I needed to have more than one scope.
I'm building a data visualization app with Mongoose Node, Express and D3JS.
Here's the directive
angular.module('prodsChart', [])
.controller('businessCtrl', ['$scope','$http', 'BusinessSrv', 'Products', function($scope, $http, $location, BusinessSrv, Products) {
Products.get()
.success(function(data) {
$scope.products = data;
});
BusinessSrv.getTotal()
.success(function(data) {
$scope.businessSales = data;
});
}])
.directive( 'saleProd', [
function () {
return {
restrict: 'E',
link: function (scope, element) {
// Building the chart here
}
And the HTML :
<sale-prod></sale-prod>
Is it good to inject that way the Services in the Directive ?
Now I have 2 set of data in two $scope.
How do I use them in the directive ?
You can inject the $rootScope into your directive:
angular.module('prodsChart', [])
.directive( 'saleProd', ['$rootScope', function ($rootScope) {
// your code here
}]);
and then use it everywhere within the directive.
In 1st and 2nd example directive is in controller's scope and controller's datasets transferred to the directive as attributes. In 1st example directive can modify controller's data. In 2nd example directive use controllers data as strings and creates 2 objects 'productsObj' and 'salesObj' and can't modify parent's scope. It depends on how you handle attributes in the directive and how to transfer them into it. Just click on items in 'Product list (directive)' section and you'll see result.
1st: http://plnkr.co/edit/v46oEGHvUnxMNYsKAeaW?p=preview
var directive = function() {
return {
restrict: 'E',
replace: true,
templateUrl: 'directive-template.html',
scope: {
products: '=',
sales: '='
}
};
};
html:
<div ng-controller="BusinessController as BusinessCtrl">
<sale-prod products="BusinessCtrl.products" sales="BusinessCtrl.sales"></sale-prod>
</div>
2nd: http://plnkr.co/edit/7CyIsqBNLbeZjyfbkGo9?p=preview
var directive = function() {
return {
restrict: 'E',
replace: true,
templateUrl: 'directive-template.html',
scope: {
products: '#',
sales: '#'
},
link: function(scope, element, attrs) {
attrs.$observe('products', function(newVal) {
scope.productsObj = angular.fromJson(newVal);
});
attrs.$observe('sales', function(newVal) {
scope.salesObj = angular.fromJson(newVal);
});
}
};
};
html:
<div ng-controller="BusinessController as BusinessCtrl">
<sale-prod products="{{BusinessCtrl.products}}" sales="{{BusinessCtrl.sales}}"></sale-prod>
</div>
3rd example is just a piece of code that show's how to inject service in directive and controller. I add it because in you example i didn't see service injection in directive:
(function(undefined) {
var app = angular.module('prodsChart', []);
var controller = function($scope, Business, Products) {
// controller logic
};
var directive = function(Business) {
return {
restrict: 'E',
link: function(scope, element, attrs) {
// here you can use all Business service logic
}
};
};
var serviceBusiness = function() {
// business service logic
};
var serviceProducts = function() {
// products service logic
};
app.controller('BusinessController', ['$scope', 'Business', 'Products', controller])
.directive('saleProd', ['Business', directive])
.service('Business', serviceBusiness)
.service('Products', serviceProducts);
})();
html:
<div ng-controller="BusinessController as BusinessCtrl"></div>
<sale-prod></sale-prod>
You could inject a Service into a directive and use it to bring data across the application or use $emit.
A less elegant solution would be using a .value() and deal with it everywhere in your application.
I have a directive that has a local scope where a partial contains ng-click.
The Fiddle is there: http://jsfiddle.net/stephanedeluca/QRZFs/13/
Unfortunatelly, since I moved my code to the directive, ng-click does not fire anymore.
The controller and the directive is as follows:
var app = angular.module('myApp', ['ngSanitize']);
app.directive('plantStages', function ($compile) {
return {
restrict: 'E',
transclude: true,
template: '<figure class="cornStages">\
<p ng-transclude style="color: skyblue"></p>\
<hr/>\
<p ng-bind-html="title"></p>\
<p ng-bind-html="subtitle">{{subtitle}}</p>\
<ul>\
<li ng-repeat="stage in stages" ng-click="changePage(stage)">{{stage}}</li>\
</ul>\
</figure>',
scope: {
stages:"=",
title:'#'
},
link: function (scope, element, attrs, ctrl, transclude) {
if (!attrs.title) scope.title = "Default title";
}
};
});
app.controller('myCtrl', function ($scope, $location, $http) {
$scope.stages = ['floraison', 'montaison'];
$scope.changePage = function (page) {
var url = "corn.page.html#/"+page;
console.log("Change page "+page+" with url "+url);
alert("about to change page as follows: document.location.href = "+url);
};
});
The html that invokes it is as follows:
<div ng-controller="myCtrl">
Stages,
<p ng-repeat="stage in stages">{{stage}}</p>
<hr/>
Plant stages
<plant-stages
title="<b>Exploration<br/>du cycle</b>"
subtitle="<em>This is a<br/>sub title</em>"
stages="stages"
>
Inner<br/>directive
</plant-stages>
</div>
Any idea?
You can't access changePage() defined in controller's scope from directive directly, since your directive has isolated scope. However, there are still several ways to do it:
Option 1:
Option 1 is the most simple option. However it is much like a workaround and I don't recommend to use it widely. You can get your controller's scope from element passed to link function and invoke changePage there:
link: function (scope, element, attrs, ctrl, transclude) {
if (!attrs.title) scope.title = "Default title";
scope.changePage = element.scope().changePage; // <= Get parent scope from element, it will have changePage()
}
Option 2:
If you don't have any logic that involves scope defined in the outer controller (as in your example), you can define inner controller for your directive and perform it there:
app.directive('plantStages', function ($compile) {
return {
...
controller: ['$scope', function($scope) {
$scope.changePage = function(page) {
var url = "corn.page.html#/"+page;
console.log("Change page "+page+" with url "+url);
alert("about to change page as follows: document.location.href = "+url);
}
}]
};
});
Option 3:
If you want do reuse logic defined in changePage() in different directives and controllers, the best way to do it is to move the logic to some service that may be injected to both controller and directive:
app.service('changePageService', function() {
this.changePage = function(page) {
var url = "corn.page.html#/"+page;
console.log("Change page "+page+" with url "+url);
alert("about to change page as follows: document.location.href = "+url);
}
});
app.controller('myCtrl', function ($scope, $location, $http, changePageService) {
...
changePageService.changePage('page');
...
});
app.directive('plantStages', function ($compile) {
...
controller: ['$scope', 'changePageService', function($scope, changePageService) {
$scope.changePage = changePageService.changePage;
}]
...
});
Option 4:
You can pass piece of code like changePage(page) as value of some attribute of the directive and inside directive define scope property with '&' that will create a function that will be executed in the outer controller's scope with arguments passed to that function. Example:
JavaScript
app.directive('plantStages', function ($compile) {
return {
restrict: 'E',
transclude: true,
template: '<figure class="cornStages">\
<p ng-transclude style="color: skyblue"></p>\
<hr/>\
<p ng-bind-html="title"></p>\
<p ng-bind-html="subtitle"></p>\
<ul>\
<li ng-repeat="stage in stages" ng-click="changePage({page: stage})">{{stage}}</li>\
</ul>\
</figure>',
scope: {
stages:"=",
title:'#',
changePage:'&'
},
link: function (scope, element, attrs, ctrl, transclude) {
if (!attrs.title) scope.title = "Default title";
}
};
});
HTML
<div ng-controller="myCtrl">
Stages,
<p ng-repeat="stage in stages">{{stage}}</p>
<hr/>
Plant stages
<plant-stages
title="<b>Exploration<br/>du cycle</b>"
subtitle="<em>This is a<br/>sub title</em>"
stages="stages"
change-page="changePage(page)"
>
Inner<br/>directive
</plant-stages>
Plunker: http://plnkr.co/edit/s4CFI3wxs0SOmZVhUkC4?p=preview
The idea of directives is to treat them as reusable components and avoid external dependencies wherever possible. If you have the possibility to define the behavior of your directive in its own controller then do it.
module.directive('myDirective', function () {
return {
restrict: 'E',
controller: function() { /* behaviour here */ },
template: '<div>Directive Template</div>',
scope: {
/* directive scope */
}
};
});
If this is not possible you can pass the function as explained in the linked question (see comment above). Check the updated fiddle.