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JBetz/dyn_over_either.hs

Last active January 28, 2019 15:17
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dynamic that only updates when constructor changes
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dyn_over_either.hs
renderEither :: Dynamic t (Either a b) -> m ()
renderEither eitherD = do
uniqEitherD <- holdUniqDynBy (\x y -> isRight x && isRight y || isLeft x && isLeft y) eitherD
dyn_ $ ffor uniqEitherD $ \case
Left val -> renderLeft $ fromLeft val <$> eitherD
Right val -> renderRight $ fromRight val <$> eitherD
renderLeft :: Dynamic t a -> m ()
renderRight :: Dynamic t b -> m ()
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