Use fela with cycle js
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README.md

Cycle-fela


Unofficial Cycle bindings for Fela.

Build Status codecov

npm install --save cycle-fela
# or if you're using yarn
yarn add cycle-fela

Usage

Behind the scene, this driver use @cycle/dom to handle the DOM. docs. But he does more than that (obviously :P). He creates a rendered for fela and handle a property in the props of your dom element. The driver looks for the component prop and use it to create the fela style.

import xs from 'xstream'
import { run } from '@cycle/run'
import { createRenderer } from 'fela'
import { span, hr } from '@cycle/dom'
import { makeFelaDomDriver, createComponent } from 'cycle-fela'

const styleNode = document.createElement('style')
document.head.appendChild(styleNode)

const root = document.createElement('div')
document.body.appendChild(root)

const RedLabel = createComponent(() => ({ color: 'red' }), 'label')
const Container = createComponent(({ mobile = true }) => ({
  display: 'flex',
  flex: mobile ? '1' : '2',
}))

function main(sources) {
  const vdom$ = xs.of(
    Container({ mobile: false }, [RedLabel('test'), span('Name:'), hr(), span(`Hello`)]),
  )
  return {
    DOM: vdom$
  }
}

run(main, {
  DOM: makeFelaDomDriver(
    root,
    { customStyleNode: styleNode }
  )
})

Example

Created with create-cycle-app and then add cycle-fela

Docs

makeFelaDomDriver

Create the driver for fela and DOM. Replace the makeDomDriver from @cycle/dom.

   makeFelaDomDriver('#app')

   const root = document.createElement('div')
   root.id = 'app'
   document.head.appendChild(root)
   makeFelaDomDriver(root)

   const nodeStyle = document.createElement('style')
   document.head.appendChild(nodeStyle)
   makeFelaDomDriver('#app-with-style', { customStyleNode: nodeStyle })

   makeFelaDomDriver('#app', { renderedOpts: { plugins: [...webPresets] } })

   // and pass it to your cycle app :
   run(main, { DOM: makeFelaDomDriver('#app') })

It takes 3 parameters :

  • selector : domNode || string -- (same as makeDomDriver)
  • options : ?Object -- default: { renderedOpts = {}, customStyleNode }
  • staticRules : ?Array -- default: []
options take two parameters:
  • rendererdOpts are the options pass to fela renderer. Config can be found here
  • customStyleNode let you specify a custom DOMNodeStyle to the renderer of fela. By default the driver create one without any id or class
staticRules take an array of staticRule for fela:

Allow to pass staticRules to fela renderer, each element of the array should be compatible with fela's renderStatic function parameters.

createComponent

Create a fela component with pre defined style and selector.

const RedLabel = createComponent(() => ({color: 'red'}), 'label')
const Container = createComponent(({mobile = true}) => ({display: 'flex', flex: mobile ? '1' : '2'}))
function main(sources) {
  const vdom$ = xs.of(
    Container({ mobile: true }, [
      RedLabel('test'),
      label('Name:'),
      hr(),
      h1(`Hello ${name}`),
    ]),
  )
  return { DOM: vdom$ }
}

const el = document.createElement('div')
el.id = 'app-test'
document.body.appendChild(el)

run(main, { DOM: makeFelaDomDriver('#app') })

The first call takes 2 parameters and return a new function:

  • style: (props:Object) => Object
  • selector: ?string -- default: 'div'
style

Takes the rules for the fela component. docs

selector

Takes a tag or a tag/selector like h() from snabbdom

The second call takes 2 parameters too and return a DOMNode:

  • props: ?Object -- default: {}
  • children: string | DOMNode | Array

if the function is called with only one parameter which is not an object, then it consider the parameter to be the children.

props

props passed to the component. Like this props of h() from snabbdom

children

Children of the component. He can be a string, a DOMNode or an array of DOMNode. Like this children of h() from snabbdom

License

Copyright © 2017 Castandet William. Licensed under the MIT License, see LICENSE.md for more information!