Execute code at startup of angular application
You can do like this,
var app = angular.module('myApp',[]);
app.run(function($rootScope) {
//.....
});
Short version
You need to use the module.run(initializationFn) function, where the actual method can depend on services. You can inject dependencies as per usual:
var app = angular
.module('demoApp', [])
.run(['$rootScope', function($rootScope) {
$rootScope.bodyClass = 'loading';
// Etc. Initialize here.
}]);
The example has initialization dependent on $rootScope, but you can also inject services, etc.
Longer version
The relevant module.run documentation is rather terse, as are the other (excellent) answers. Let me combine it into a more verbose example, that also shows how to inject a factory created service in your initializationFn:
var app = angular.module('demoApp', []);
// Service that we'll also use in the .run method
app.factory('myService', [function() {
var service = { currentItem: { started: new Date() } };
service.restart = function() {
service.currentItem.started = new Date();
};
return service;
}]);
// For demo purposes
app.controller('demoCtrl', ['$scope', 'myService', function($scope, myService) {
$scope.header = 'Demo!';
$scope.item = myService.currentItem;
$scope.restart = myService.restart;
}]);
// This is where your initialization code goes, which
// may depend on services declared on the module.
app.run(['$window', 'myService', function($window, myService) {
myService.restart();
$window.alert('Started!');
}]);<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="demoApp" ng-controller='demoCtrl' ng-cloak>
<h1>{{ header }}</h1>
<p>Current item started: {{ item.started }}</p>
<p><button ng-click="restart()">Restart</button></p>
</div>You can use the "run" function from the Module API: http://docs.angularjs.org/api/angular.Module
This code will be executed after injector creation so you should be able to get at the service you are looking to use.