[AngularJS] Understanding Code

I am learning angularjs 2. I am following this git repo. Here I got below codes in *index.html*. System.import('app').catch(function(err){ console.error(err); }); Why these codes used in *index.html* ? What are the necessitys of i

[AngularJS] Understanding Code

I got this code *$rootScope.$on('abc',function(event, next, current){ })* in a tutorial. My question is what is *.$on() *here * ??* If it is a function, then why a *$ *sign is before it ?? Thanks Foysal -- You received this message because you are subscribed to the Google Groups "Angula