Execjs

Execjs allows you run JavaScript from Elixir. It can automatically pick the best runtime available on the system.

Runtimes

Execjs supports the following runtimes:

• Node.js
• SpiderMonkey
• JavaScriptCore
• Rhino

Use the application environment (application key: :execjs, key: :runtime) to set the runtime Execjs uses. Alternatively, the EXECJS_RUNTIME environment variable can also be used to set the runtime.

Usage

eval

iex> Execjs.eval "'red yellow blue'.split(' ')"
["red", "yellow", "blue"]

compile/call

iex> source = System.cmd("curl -sL --compressed https://rawgit.com/jashkenas/coffeescript/master/extras/coffee-script.js")
iex> context = Execjs.compile(source)
iex> Execjs.call(context, "CoffeeScript.compile", ["square = (x) -> x * x"])
"(function() {\n  var square;\n\n  square = function(x) {\n    return x * x;\n  };\n\n}).call(this);\n"