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bodil/purescript-signal

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license: Apache-2.0

Language: PureScript .

Elm style FRP library for PureScript

最后发布版本: v13.0.0 ( 2022-05-02 14:21:08)

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purescript-signal

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Signal is a lightweight FRP-like library heavily inspired by the Elm Signal implementation. Where possible and sensible, it tries to maintain API equivalence with Elm.

See the Elm documentation for details on usage and principles.

PureScript Usage Patterns

PureScript depends on effects (specifically, the Effect monad) to manage side effects, where Elm's runtime generally manages them for you. purescript-signal provides the Signal.runSignal function for running effectful signals.

module Main where

import Effect.Console
import Effect (Effect)
import Prelude
import Signal

hello :: Signal String
hello = constant "Hello Joe!"

helloEffect :: Signal (Effect Unit)
helloEffect = hello ~> log

main = runSignal helloEffect

This simple example takes a constant signal which contains the string "Hello Joe!" and maps it over the Effect.Console.log function, which has the type String -> Effect Unit, thus taking the String content of the signal and turning it into an effect which logs the provided string to the user's console.

This gives us a Signal (Effect Unit). We use runSignal to take the signal of effects and run each effect in turn—in our case, just the one effect which prints "Hello Joe!" to the console.

API Documentation

Usage Examples

最近版本更新:(数据更新于 2024-09-07 10:29:54)

2022-05-02 14:21:08 v13.0.0

2018-06-07 19:28:36 v10.1.0

2018-06-01 14:52:09 v10.0.0

bodil/purescript-signal同语言 PureScript最近更新仓库

2024-02-13 14:28:23 nammayatri/nammayatri

2019-06-11 06:31:45 bodil/purescript-smolder

1970-01-01 00:00:00 sharkdp/cube-composer