I have a single page application that consists of 4,000 lines of ClojureScript. The page is served up from a Clojure Web Server and is running inside of my browser. What I want to do is to start a REPL inside of my page and connect to it from outside of my page. So, do we have any browser hosted REPL's?
A lot of the basics are covered in the ClojureScript wiki here.
As of 2014 two popular browser REPLs are:
A simplified façade on top of Weasel is simple-brepl.