mquickjs-hs

This package provides a Haskell wrapper for the Micro QuickJS JavaScript Engine. It has been inspired by the quickjs-rs and ocaml-quickjs libraries.

Features

The functionality is quite basic and is currently limited to:

• Evaluating JS code
• Calling a JS function in the global scope
• Marshalling Aeson Values to and from JSValues.

Examples

Evaluate an expression:

import MQuickJS

one_plus_two = mquickjs $ do
  res <- eval "1+2"
  liftIO $ print res

Declare a function and call it on an argument:

call_f = mquickjs $ do
  _ <- eval_ "function f(x) { return x + 1; }"
  res <- eval "f(2)"
  liftIO $ print res

Pass a Haskell value (which has a ToJSON instance) to the JS runtime:

aeson_marshall = mquickjs $ do
  _ <- eval_ "function f(x) { return x + 1; }"
  res <- withJSValue (3::Int) $ \x -> call "f" [x]
  liftIO $ print res

Contributing

Please feel free to report bugs/submit feature requests via the github issue tracker and submit any pull requests to the git repository.