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Im trying to send a message from within a directive to its parent controller (without success)
Here is my HTML
<div ng-controller="Ctrl">
<my-elem/>
</div>
Here is the code in the controller which listens for the event
$scope.on('go', function(){ .... }) ;
And finally the directive looks like
angular.module('App').directive('myElem',
function () {
return {
restrict: 'E',
templateUrl: '/views/my-elem.html',
link: function ($scope, $element, $attrs) {
$element.on('click', function() {
console.log("We're in") ;
$scope.$emit('go', { nr: 10 }) ;
}
}
}
}) ;
I've tried different scope configuration and $broadcast instead of $emit. I see that the event gets fired, but the controller does not receive a 'go' event. Any suggestions ?
546
isolatedBindingFoo:'=bindingFoo' can pass the data from directive to controller. or you can use service. Before you down vote someone you are welcome to ask it first if you don't understand.
$scope.$parent refers to the $scope of the parent element. E.g. if you have an element with a controller nested within another element with it's own controller: <div ng-controller="parentController"> ...
scope is an AngularJS scope object. element is the jqLite-wrapped element that this directive matches. attrs is a hash object with key-value pairs of normalized attribute names and their corresponding attribute values. controller is the directive's required controller instance(s) or its own controller (if any).
$broadcast, $emit, and $on are deprecatedUse of the scope/rootScope event bus is deprecated and will make migration to Angular 2+ more difficult.
To facilitate making the transition to Angular 2+ easier, AngularJS 1.5 introduced components:
app.component("myElem", {
bindings: {
onGo: '&',
},
template: `
<button ng-click="$ctrl.go($event,{nr:10})">
Click to GO
</button>
`,
controller: function() {
this.go = (event,data) => {
this.onGo({$event: event, $data: data});
};
}
});
Usage:
<div ng-controller="Ctrl as $ctrl">
<my-elem on-go="$ctrl.fn($data)></my-elem>
</div>
The component uses an attribute with AngularJS expression (&) binding that invokes a function in the parent controller. Instead of clogging the scope/rootScope event bus with numerous events, the event goes directly to the function that uses it.
angular.module('app', [])
.controller ('Ctrl', function () {
this.go = (data) => {
console.log(data);
this.update = data;
};
})
.component("myElem", {
bindings: {
onGo: '&',
},
template: `
<fieldset>
<input ng-model="$ctrl.nr" /><br>
<button ng-click="$ctrl.go($event,$ctrl.nr)">
Click to Update
</button>
</fieldset>
`,
controller: function() {
this.nr = 10;
this.go = (event,data) => {
this.onGo({$event: event, $data: data});
};
}
})<script src="//unpkg.com/angular/angular.js"></script>
<body ng-app="app" ng-controller="Ctrl as $ctrl">
<p>update={{$ctrl.update}}</p>
<my-elem on-go="$ctrl.go($data)"></my-elem>
</body>For more information, see
106
There is no method on with scope. In angular it's $on
below should work for you
<!doctype html>
<html ng-app="test">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.2/angular.js"></script>
</head>
<body ng-controller="test" >
<my-elem/>
<!-- tabs -->
<script>
var app = angular.module('test', []);
app.controller('test', function ($scope) {
$scope.$on('go', function () { alert('event is clicked') });
});
app.directive('myElem',
function () {
return {
restrict: 'E',
replace:true,
template: '<div><input type="button" value=check/></input>',
link: function ($scope, $element, $attrs) {
alert("123");
$element.bind('click', function () {
console.log("We're in");
$scope.$emit('go');
});
}
}
}) ;
</script>
</body>
</html>
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