22357 2013-06-13 20:36:17 +0000 Don't special case callable 'then' 2013-09-10 12:43:52 +0000 1 1 1 Unclassified WebAppsWG DOM unspecified PC Linux RESOLVED MOVED P2 normal --- 1 bugs annevk bzbarsky mike mounir www-dom public-webapps-bugzilla oldest_to_newest 89278 0 bugs 2013-06-13 20:36:17 +0000 http://dom.spec.whatwg.org/#promises-model would be simpler if "If JavaScript IsCallable(then) is true, run these substeps and then terminate these steps:" wasn't there, but if 'then' isn't callable, just throw and handle that the same way what would happen if 'then' was callable and throws an exception. 89298 1 annevk 2013-06-14 06:29:08 +0000 Why would we try to invoke 'then' if it's not callable though? It seems this design might change slightly anyway :/ 93201 2 annevk 2013-09-10 12:43:52 +0000 The reason for doing [[Get]] and checking if it's callable and then [[Call]] rather than just doing [[Invoke]] is because a lot of JavaScript does it that way. We might change some of this though: https://github.com/domenic/promises-unwrapping/issues/25 In any event, this is now out of scope for DOM as the text has moved (temporarily).