$injector is a service which is used to invoke controller functions, service functions, filter functions, and
any other function that might need dependencies as parameters. Angular creates only a single $injector object
when an application is bootstrapped and uses that object for invoking.
<script>
var app = angular.module('app', []);
app.service('s1', function () {
this.value = 22;
});
app.controller("MyCtrl", function ($scope, $injector) {
$scope.doSomething = function () {
var s1 = $injector.get('s1')
s1.value += 10
}
$scope.value = function () {
var s1 = $injector.get('s1')
return s1.value
}
});
</script>
<div ng-app="app" ng-controller="MyCtrl">
<button ng-click="doSomething()">increment</button>
{{value()}}
</div>
$inject is property which is used to inject the dependencies of a function as an array of strings.
<script type="text/javascript">
var MyController = function(renamed$scope, renamedGreeter) {
// ...
}
MyController['$inject'] = ['$scope', 'greeter']; //inject dependencies as an array of
strings
</script>
