this is rather in JS question... you should mark the title with (OT JS)

principally you are looking for "goto" like constructs.

AFAIK those are in JS

• function: return
• loop: break/continue
• try/catch

(@all: please feel free to extend if I forgot something)

IMHO your function solution is the canonical approach, I'd just prefer an anonymous function to avoid potential conflicts with another "xxx".

(function (){if(1){console.log("aaa"); return;} console.log("bbb");})(
+);
[download]

(function(){...})() is analogous to sub {...}->() in Perl.

If you are worried about the boilerplate, use Perl to wrap the (function(){...})() part around it and extend the class with a new method.