Services are instantiated with the new keyword, use this for public methods and variables. Since these are so similar to factories, use a factory instead for consistency.
Note: All Angular services are singletons. This means that there is only one instance of a given service per injector.
// service
angular
.module('app')
.service('logger', logger);
function logger() {
this.logError = function(msg) {
/* */
};
}
// factory
angular
.module('app')
.factory('logger', logger);
function logger() {
return {
logError: function(msg) {
/* */
}
};
}