lein-figwheel
Figwheel builds your ClojureScript code and loads it into the browser
...Every time you save your ClojureScript source file, the changes are sent to the browser so that you can see the effects of modifying your code in real-time. The inclusion of a static file server allows you to get a decent ClojureScript development environment up and running quickly. For convenience there is a :ring-handler option so you can load a ring handler into the figwheel server.