Regex.replace/4, Regex.match?/2, and String.replace/4 throw the following error in the browser:

TypeError: Cannot read property 'run' of undefined

while trying to call

ElixirScript.Core.re.run

See here for a repository that demonstrates the issue: https://github.com/mrdziuban/elixirscript_test.

You can also go to http://mattdziuban.com/elixirscript_test/ and click the buttons to see the error and stack trace.