Simple, fast & type safe web applications
Flame is a PureScript front-end framework inspired by the Elm architecture with focus on simplicity and performance. Featuring:
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Message based state updating – see Handling events
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Subscriptions – see Handling external events
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Server side rendering – see Rendering the app
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Performance comparable to native JavaScript frameworks – see benchmarks
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Parse HTML into Flame markup with breeze
Quick start
Install:
spago install flame
Example counter app:
module Counter.Main where
import Prelude
import Effect (Effect)
import Flame (Html, QuerySelector(..), Subscription)
-- Side effects free updating; see docs for other examples
import Flame.Application.NoEffects as FAN
import Flame.Html.Element as HE
import Flame.Html.Attribute as HA
-- | The model represents the state of the app
type Model = Int
-- | Data type used to represent events
data Message = Increment | Decrement
-- | Initial state of the app
init :: Model
init = 0
-- | `update` is called to handle events
update :: Model -> Message -> Model
update model = case _ of
Increment -> model + 1
Decrement -> model - 1
-- | `view` is called whenever the model is updated
view :: Model -> Html Message
view model = HE.main "main" [
HE.button [HA.onClick Decrement] "-",
HE.text $ show model,
HE.button [HA.onClick Increment] "+"
]
-- | Events that come from outside the `view`
subscribe :: Array (Subscription Message)
subscribe = []
-- | Mount the application on the given selector
main :: Effect Unit
main = FAN.mount_ (QuerySelector "body") {
init,
view,
update,
subscribe
}