Add Javascript's Error type

README.md

@@ -2,6 +2,16 @@
 
 ## Module Global
 
+### Types
+
+    data Error :: *
+
+
+### Type Class Instances
+
+    instance showError :: Show Error
+
+
 ### Values
 
     infinity :: Prim.Number

src/Global.purs

@@ -1,4 +1,12 @@
-module Global where
+module Global
+  ( nan
+  , isNaN
+  , infinity
+  , isFinite
+  , readInt
+  , readFloat
+  , Error(..)
+  ) where
 
 foreign import nan "var nan = NaN;" :: Number
 
@@ -16,3 +24,13 @@ foreign import readInt
   \}" :: Number -> String -> Number
 
 foreign import readFloat "var readFloat = parseFloat;" :: String -> Number
+
+foreign import data Error :: *
+
+instance showError :: Show Error where
+  show = showErrorImpl
+
+foreign import showErrorImpl
+  "function showErrorImpl(err) {\
+  \  return err.stack ? err.stack : err.toString();\
+  \}" :: Error -> String