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Cycle ReactDOM

Cycle.js driver that uses React DOM to render the view

  • Provides a driver factory makeDOMDriver
  • Contains hyperscript helper functions, like in Cycle DOM
npm install @cycle/react-dom

Example

import xs from 'xstream';
import {run} from '@cycle/run';
import {makeDOMDriver, div, h1, button} from '@cycle/react-dom';

function main(sources) {
  const inc = Symbol();
  const inc$ = sources.react.select(inc).events('click');

  const count$ = inc$.fold(count => count + 1, 0);

  const vdom$ = count$.map(i =>
    div([
      h1(`Counter: ${i}`),
      button(inc, 'Increment'),
    ]),
  );

  return {
    react: vdom$,
  };
}

run(main, {
  react: makeDOMDriver(document.getElementById('app')),
});

API

makeDOMDriver(container)

Returns a driver that uses ReactDOM to render your Cycle.js app into the given container element.

Hyperscript helpers

Import hyperscript helpers such as div, span, p, button, input, etc to create React elements to represent the respective HTML elements: <div>, <span>, <p>, <button>, <input>, etc.

The basic usage is div(props, children), but some variations and shortcuts are allowed:

  • div() becomes h('div')
  • div('#foo') becomes h('div', {id: 'foo'})
  • div('.red') becomes h('div', {className: 'red'})
  • div('.red.circle') becomes h('div', {className: 'red circle'})
  • div('#foo.red') becomes h('div', {id: 'foo', className: 'red'})
  • div(propsObject) becomes h('div', propsObject)
  • div('text content') becomes h('div', 'text content')
  • div([child1, child2]) becomes h('div', [child1, child2])
  • div(props, 'text content') becomes h('div', props, 'text content')
  • div(props, [child1, child2]) becomes h('div', props, [child1, child2])
  • div('#foo.bar', props, [child1, child2])
  • etc

There are also shortcuts for (MVI) intent selectors:

  • div(someSymbol) becomes h('div', {sel: someSymbol})
  • div('inc#foo.bar') becomes h('div', {sel: 'inc', id: 'foo', className: 'bar'})
  • div('inc', props) becomes h('div', {sel: 'inc', ...props})
  • div('inc', 'text content') becomes h('div', {sel: 'inc'}, 'text content')
  • div('inc', [child1]) becomes h('div', {sel: 'inc'}, [child1])
  • div('inc', props, [child1]) becomes h('div', {sel: 'inc'}, [child1])
  • etc

JSX

Babel

Add the following to your webpack config:

module: {
  rules: [
    {
      test: /\.jsx?$/,
      loader: 'babel-loader',
      options: {
        plugins: [
          ['transform-react-jsx', { pragma: 'jsxFactory.createElement' }],
        ]
      }
    }
  ]
},

If you used create-cycle-app you may have to eject to modify the config.

Automatically providing jsxFactory

You can avoid having to import jsxFactory in every jsx file by allowing webpack to provide it:

plugins: [
  new webpack.ProvidePlugin({
    jsxFactory: ['react-dom', 'jsxFactory']
  })
],

Typescript

Add the following to your tsconfig.json:

{
  "compilerOptions": {
    "jsx": "react",
    "jsxFactory": "jsxFactory.createElement"
  }
}

If webpack is providing jsxFactory you will need to add typings to custom-typings.d.ts:

declare var jsxFactory: any;

Usage

import { jsxFactory } from '@cycle/react-dom';

function view(state$: Stream<State>): Stream<ReactElement> {
    return state$.map(({ count }) => (
        <div>
            <h2>Counter: {count}</h2>
            <button sel="add">Add</button>
            <button sel="subtract">Subtract</button>
        </div>
    ));
}

Notes

Please ensure you are depending on compatible versions of @cycle/react and @cycle/react-dom. They should both be at least version 2.1.x.

yarn list @cycle/react

should return a single result.

License

MIT, Andre 'Staltz' Medeiros 2018