can't get service instance from $injector.get()

Question

I define a customer service named \"greeting\", but can\'t get the instance from $injector.get(\'greeting\'). It will throw such error: Unknown provider: greetingProvider &l

Answer 1

You need to create the injector from the module.

var app = angular.module('myDI', []);
app.config(function($provide){
    $provide.provider('greeting', function(){
        this.$get = function(){
             return function(name) {
                 console.log("Hello, " + name);
            };
        };
    });
});
var injector = angular.injector(['myDI', 'ng']); //Add this line
var greeting = injector.get('greeting');
greeting('Ford Prefect');
var injector = angular.injector();

Try it here. FIDDLE