Test Figwheel via the REPL
Verify figwheel is working by entering the following code at the REPL prompt in the terminal window.
This will be the same terminal window in which you ran
(js/alert "Am I connected to the browser repl with figwheel?")
An alert box should appear in the browser window that opened when figwheel was run.
Test Figwheel from source code changes
Verify figwheel is working by editing the code in the file
hello-world function and change the last line to show a different message
(defn hello-world  [:div [:h1 (:text @app-state)] [:h3 "Changes in the code are loaded as soon as you save the file!"]])