A wrapper around a JavaScript string

An algebraic data type that can represent a JavaScript value. Any JavaScriptCore JSVal can be converted into this type.

Show a JSValue but just say "object" if the value is a JavaScript object.

Given a JavaScript value get its boolean value. All values in JavaScript convert to bool.

>>> testJSaddle $ valToBool JSNull
false
>>> testJSaddle $ valToBool ()
false
>>> testJSaddle $ valToBool True
true
>>> testJSaddle $ valToBool False
false
>>> testJSaddle $ valToBool (1.0 :: Double)
true
>>> testJSaddle $ valToBool (0.0 :: Double)
false
>>> testJSaddle $ valToBool ""
false
>>> testJSaddle $ valToBool "1"
true

Given a JavaScript value get its numeric value. May throw JSException.

>>> testJSaddle $ show <$> valToNumber JSNull
0.0
>>> testJSaddle $ show <$> valToNumber ()
NaN
>>> testJSaddle $ show <$> valToNumber True
1.0
>>> testJSaddle $ show <$> valToNumber False
0.0
>>> testJSaddle $ show <$> valToNumber (1.0 :: Double)
1.0
>>> testJSaddle $ show <$> valToNumber (0.0 :: Double)
0.0
>>> testJSaddle $ show <$> valToNumber ""
0.0
>>> testJSaddle $ show <$> valToNumber "1"
1.0

Given a JavaScript value get its string value (as a JavaScript string). May throw JSException.

>>> testJSaddle $ strToText <$> valToStr JSNull
null
>>> testJSaddle $ strToText <$> valToStr ()
undefined
>>> testJSaddle $ strToText <$> valToStr True
true
>>> testJSaddle $ strToText <$> valToStr False
false
>>> testJSaddle $ strToText <$> valToStr (1.0 :: Double)
1
>>> testJSaddle $ strToText <$> valToStr (0.0 :: Double)
0
>>> testJSaddle $ strToText <$> valToStr ""

>>> testJSaddle $ strToText <$> valToStr "1"
1

Given a JavaScript value get its object value. May throw JSException.

>>> testJSaddle $ (valToObject JSNull >>= valToText) `catch` \ (JSException e) -> valToText e
null
>>> testJSaddle $ (valToObject () >>= valToText) `catch` \ (JSException e) -> valToText e
undefined
>>> testJSaddle $ valToObject True
true
>>> testJSaddle $ valToObject False
false
>>> testJSaddle $ valToObject (1.0 :: Double)
1
>>> testJSaddle $ valToObject (0.0 :: Double)
0
>>> testJSaddle $ valToObject ""

>>> testJSaddle $ valToObject "1"
1

Given a JavaScript value get its string value (as a Haskell Text). May throw JSException.

>>> testJSaddle $ show <$> valToText JSNull
"null"
>>> testJSaddle $ show <$> valToText ()
"undefined"
>>> testJSaddle $ show <$> valToText True
"true"
>>> testJSaddle $ show <$> valToText False
"false"
>>> testJSaddle $ show <$> valToText (1.0 :: Double)
"1"
>>> testJSaddle $ show <$> valToText (0.0 :: Double)
"0"
>>> testJSaddle $ show <$> valToText ""
""
>>> testJSaddle $ show <$> valToText "1"
"1"

Given a JavaScript value get a JSON string value. May throw JSException.

>>> testJSaddle $ strToText <$> valToJSON JSNull
null
>>> testJSaddle $ strToText <$> valToJSON ()

>>> testJSaddle $ strToText <$> valToJSON True
true
>>> testJSaddle $ strToText <$> valToJSON False
false
>>> testJSaddle $ strToText <$> valToJSON (1.0 :: Double)
1
>>> testJSaddle $ strToText <$> valToJSON (0.0 :: Double)
0
>>> testJSaddle $ strToText <$> valToJSON ""
""
>>> testJSaddle $ strToText <$> valToJSON "1"
"1"
>>> testJSaddle $ strToText <$> (obj >>= valToJSON)
{}

Convert to a JavaScript value (just an alias for toJSVal)

A null JavaScript value

Test a JavaScript value to see if it is null

An undefined JavaScript value

Test a JavaScript value to see if it is undefined

Convert a JSVal to a Maybe JSVal (converting null and undefined to Nothing)

A JavaScript boolean value

Make a JavaScript number

Make a JavaScript string from JSString

Make a JavaScript string from Text

Make a JavaScript string from AESON Value

Derefernce a value reference.

>>> testJSaddle $ showJSValue <$> deRefVal JSNull
null
>>> testJSaddle $ showJSValue <$> deRefVal ()
undefined
>>> testJSaddle $ showJSValue <$> deRefVal True
true
>>> testJSaddle $ showJSValue <$> deRefVal False
false
>>> testJSaddle $ showJSValue <$> deRefVal (1.0 :: Double)
1.0
>>> testJSaddle $ showJSValue <$> deRefVal (0.0 :: Double)
0.0
>>> testJSaddle $ showJSValue <$> deRefVal ""
""
>>> testJSaddle $ showJSValue <$> deRefVal "1"
"1"
>>> testJSaddle $ showJSValue <$> (valToObject True >>= deRefVal)
true
>>> testJSaddle $ showJSValue <$> (obj >>= deRefVal)
object

Make a JavaScript value out of a JSValue ADT.

>>> testJSaddle $ valMakeRef ValNull
null
>>> testJSaddle $ valMakeRef ValUndefined
undefined
>>> testJSaddle $ valMakeRef (ValBool True)
true
>>> testJSaddle $ valMakeRef (ValNumber 1)
1
>>> testJSaddle $ valMakeRef (ValString $ T.pack "Hello")
Hello

Determine if two values are equal (JavaScripts ===) >>> testJSaddle $ strictEqual True False false >>> testJSaddle $ strictEqual True True true >>> testJSaddle $ strictEqual Hello () false >>> testJSaddle $ strictEqual Hello Hello true

Determine if two values are equal (JavaScripts ===) >>> testJSaddle $ instanceOf obj (Object $ jsg Object) true