AngularJS - Dependency injection in services, factories, filters etc

Question

So I have some plugins and libraries I want to use in my angular app and (currently) I am simply referencing those functions/methods as they were intended in 99% of apps in a wa

Answer 1

While the already existing answers are correct and working, john papas angular style guide favors the use of the $inject service in Y091:

Filter:

app.filter('<filter', MyFilter);
MyFilter.$inject = ['$http'];
function MyFilter() {
  return function(data) {
  }
}

Directive:

app.directive('<directive>', MyDirective);
MyDirective.$inject = ['$http'];
function MyDirective() {
  return {
    ...
  }
}

Factory:

app.factory('<factory>', MyFactory);
MyFactory.$inject = ['$http'];
function MyFactory() {
  var shinyNewServiceInstance;
  return shinyNewServiceInstance;
}

Service:

app.service('<service>', MyService);
MyService.$inject = ['$http'];
function MyService() {
  this.foo = foo;
  function foo(){
    ...
  }
}

Answer 2

For the sake of completeness, here is a service example with injection:

app.service('<service>', ['$http', function($http) {
  this.foo = function() { ... }
}]);

Answer 3

Yes you can use dependency injection for filters and directives

Ex:

Filter:

app.filter('<filter>', ['$http', function(http){
    return function(data){
    }
}]);

Directive:

app.directive('<directive>', ['$http', function(http){
    return {
        ....
    }
}]);

Service:

app.factory('<service>', ['$http', function(http) {
  var shinyNewServiceInstance;
  return shinyNewServiceInstance;
}]);