custom_element.js

import {Rx} from '@cycle/core';
import {h} from '@cycle/dom';

export default class Element {
  constructor() {
    return (responses) => {
      let actions = this.intent(responses.DOM);
      let tree$ = this.view(this.model(responses, actions))
      let events = {}
      return {
        DOM: tree$,
        events
      }
    }
  }

  intent(){
    return {};
  }

  model(actionMap){
    return Rx.Observable.just([]);
  }

  view(state$) {
    state$.map( () => h('div') )
  }
}

結局全部overrideなので意味なさげ