A porting of The Elm Architecture to TypeScript featuring fp-ts, RxJS and React.
npm i elm-ts fp-ts rxjs reactNote: fp-ts, rxjs and react are peer dependencies
- no ports
Reactinstead ofvirtual-dom(pluggable)Navigationis based on history
import * as React from 'elm-ts/lib/React'
import { render } from 'react-dom'
import * as component from './examples/Counter'
const main = React.program(component.init, component.update, component.view)
React.run(main, dom => render(dom, document.getElementById('app')!))How to derive decoders from io-ts codecs
import * as t from 'io-ts'
import { failure } from 'io-ts/lib/PathReporter'
function fromCodec<A>(codec: t.Decoder<unknown, A>): Decoder<A> {
return flow(
codec.decode,
E.mapLeft(errors => failure(errors).join('\n'))
)
}For Html (and its specializations) programs:
import { programWithDebugger } from 'elm-ts/lib/Debug/Html'
import * as React from 'elm-ts/lib/React'
import { render } from 'react-dom'
import * as component from './examples/Counter'
const program = process.env.NODE_ENV === 'production' ? React.program : programWithDebugger
const main = program(component.init, component.update, component.view)
React.run(main, dom => render(dom, document.getElementById('app')!))For Navigation (and its specializations) programs:
import { programWithDebuggerWithFlags } from 'elm-ts/lib/Debug/Navigation'
import * as Navigation from 'elm-ts/lib/Navigation'
import * as React from 'elm-ts/lib/React'
import { render } from 'react-dom'
import * as component from './examples/Navigation'
const program = process.env.NODE_ENV === 'production' ? Navigation.programWithFlags : programWithDebuggerWithFlags
const main = program(component.locationToMsg, component.init, component.update, component.view)
React.run(main(component.flags), dom => render(dom, document.getElementById('app')!))If you need to stop the application for any reason, you can use the withStop combinator:
import { withStop } from 'elm-ts/lib/Html'
import * as React from 'elm-ts/lib/React'
import { render } from 'react-dom'
import { fromEvent } from 'rxjs'
import * as component from './examples/Counter'
const stopSignal$ = fromEvent(document.getElementById('stop-btn'), 'click')
const program = React.program(component.init, component.update, component.view)
const main = withStop(stopSignal$)(program)
React.run(main, dom => render(dom, document.getElementById('app')!))The combinator takes a Program and stops consuming it when the provided Observable emits a value.
In case you want to enable the debugger, you have to use some specific functions from the Debug sub-module:
// instead of `programWithDebuggerWithFlags`
import { programWithDebuggerWithFlagsWithStop } from 'elm-ts/lib/Debug/Navigation'
import { withStop } from 'elm-ts/lib/Html'
import * as Navigation from 'elm-ts/lib/Navigation'
import * as React from 'elm-ts/lib/React'
import { render } from 'react-dom'
import * as component from './examples/Navigation'
const stopSignal$ = fromEvent(document.getElementById('stop-btn'), 'click')
const program =
process.env.NODE_ENV === 'production'
? Navigation.programWithFlags
: programWithDebuggerWithFlagsWithStop(stopSignal$)
const main = withStop(stopSignal$)(program(component.locationToMsg, component.init, component.update, component.view))
React.run(main(component.flags), dom => render(dom, document.getElementById('app')!))
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