elm/libraries/JavaScript/Experimental.elm

module JavaScript.Experimental where

import JavaScript (JSObject)
import Native.JavaScript as Native

-- Turn arbitrary JavaScript objects into Elm records.
-- Arrays are converted into lists, nested objects are allowed.
-- No `null` values or non-homogeneous arrays.
--
--         -- OK objects
--         { student:"Steve", scores:[83,94,99,72] }
--         { errorLevel:10, critical:true }
--
--         -- BAD objects
--         { answer:null }
--         { info:[true,42,'what'] }
toRecord : JSObject -> a
toRecord = Native.toRecord

-- Turn arbitrary Elm records into JavaScript objects.
-- Lists become arrays, nested records are allowed. No ADTs.
--
--         -- OK records
--         { student="Steve", scores=[83,94,99,72] }
--         { errorLevel=10, critical=True }
--
--         -- BAD records
--         { answer = Nothing }
--         { result = Left "An error occurred" }
fromRecord : a -> JSObject
fromRecord = Native.fromRecord