This shouldn't even be a discussion, just look how the entire JavaScript community does it. Spoiler: `function() {`

https://github.com/jquery/jquery/blob/master/src/callbacks.js#L40
https://github.com/jashkenas/backbone/blob/master/backbone.js#L108
https://github.com/angular/angular.js/blob/master/src/loader.js#L287
https://github.com/emberjs/ember.js/blob/master/packages/ember-views/lib/views/component.js#L136