Specular.Ref

data Ref a

Constructors

• Ref (Dynamic a) ((a -> a) -> Effect Unit)

Instances

• Invariant Ref

newRef :: forall a m. MonadEffect m => a -> m (Ref a)

Old name for new.

new :: forall a m. MonadEffect m => a -> m (Ref a)

Create a new Ref with an initial value.

newRefWithEvent :: forall a m. MonadFRP m => a -> Event (a -> a) -> m (Ref a)

value :: forall a. Ref a -> Dynamic a

The current value of the Ref, as a Dynamic.

modify :: forall a. Ref a -> (a -> a) -> Effect Unit

A Callback to modify value of this Ref using a function.

refUpdateConst :: forall a. Ref a -> a -> Effect Unit

Old name for set.

set :: forall a. Ref a -> a -> Effect Unit

A Callback to overwrite value of this Ref.

focusRef :: forall a s. Dynamic (Lens s a) -> Ref s -> Ref a

pureFocusRef :: forall a s. Lens s a -> Ref s -> Ref a

previewRef :: forall a s. Prism s a -> Ref s -> Ref (Maybe a)

readRef :: forall a m. MonadEffect m => Ref a -> m a

constRef :: forall a. a -> Ref a

wrapViewWidget :: forall a m. MonadWidget m => (WeakDynamic a -> m (Event a)) -> Ref a -> m Unit

type Lens s a = { get :: s -> a, set :: s -> a -> s }

type Prism s a = { preview :: s -> Maybe a, review :: a -> s }

updateRef :: forall a. Ref a -> a -> Effect Unit

refValue :: forall a. Ref a -> Dynamic a

Old name for value

refUpdate :: forall a. Ref a -> (a -> a) -> Effect Unit

Old name for modify.