Mechanism for creating variables in Angular through factory services

While delving into the world of angular1, I encountered services and factories. Using the .factory() method, I passed in a string that represented the desired service name. Surprisingly, I found myself able to reference a variable matching this string without actually creating it explicitly. This led me to wonder about the underlying mechanism at play here. Could it be related to dependency injection? The way angular/js achieves this auto-variable creation eludes my current understanding.

app.factory('myData', function() {
    return {...}
}

app.controller('MyController',
    function MyController($scope, myData) {
        ...
    }
);

Answer №1

In Angular, Services and Factories operate as singletons, being instantiated through the dependency injection pattern, with their references resolved at runtime by the core of Angular.

As a result, developers are relieved of the burden of directly managing these references. When the controller is executed, the references are automatically injected and can be utilized accordingly.

app.controller('MyController',
    function MyController($scope, myData) {
        ...
    }
);

For further documentation on services, visit: https://docs.angularjs.org/guide/services

To learn more about dependency injection, check out: https://en.wikipedia.org/wiki/Dependency_injection

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