Do I always need catch() at the end even if I use a reject callback in all then-ables?
问题 I am putting catches at the end, but they are returning empty object in one particular instance at least. Is a catch necessary for anything unbeknownst, or is it just screwing me up? $( document).ready(function(){ app.callAPI()//a chainable a RSVP wrapper around a jquery call, with its own success() fail() passing forward to the wrapper, so it will either be a resolved or rejected thenable to which is now going to be chained .then( function(env) { //set the property you needed now app