Halogen.Aff

type HalogenIO query output m = { dispose :: m Unit, messages :: Emitter output, query :: forall a. query a -> m (Maybe a) }

A record produced when the root component in a Halogen UI has been run.

• query allows external sources to query the root component
• messages allows external consumers to receive messages raised by the root component
• dispose stops running the UI and finalizes the root component

selectElement :: QuerySelector -> Aff (Maybe HTMLElement)

Tries to find an element in the document.

runHalogenAff :: forall x. Aff x -> Effect Unit

Runs an Aff value of the type commonly used by Halogen components. Any unhandled errors will be re-thrown as exceptions.

awaitLoad :: Aff Unit

Waits for the document to load.

awaitBody :: Aff HTMLElement

Waits for the document to load and then finds the body element.