angularjs - John Papa's Angular Style Guide Y165 Recommendation... what to inject in app.core module? -

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in y165, john papa recommends injecting cross app modules app.core. 

angular.module('app.core', [angular modules, 'nganimate', 'ngsanitize', cross-app modules, 3rd party modules]);

however, in other examples, manually injects needs in own module... i.e.

dataservice.$inject = ['$http'];

$http common one, i'm thinking injecting app.core. bad idea?

i'm little confused, inject app.core , how determine whether should injected manually or if should injected app.core? (i.e. there unspoken rule put app.core if 2+ modules share it? 3+ modules?)


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