Hi Shanhong,
1. Yes, only on constructors. (this might not be 100% technically true, but while learning its a good assumption) 2. No, you can inject whatever you want, in whatever class/directive/service, as long as its injectable. Regards Sander -- You received this message because you are subscribed to the Google Groups "AngularJS" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/angular. For more options, visit https://groups.google.com/d/optout.
