Tiny Cycle.js 1

tiny-cycle-1.js

function main() {
  return {
    DOM: Rx.Observable.timer(0, 1000)
      .map(i => `Seconds elapsed ${i}`)
  };
}

const drivers = {
  DOM: function DOMDriver(sink) {
    sink.subscribe(text => {
      document.querySelector('#app').textContent = text;
    });
  }
};

function run(main, drivers) {
  const sinks = main();
  drivers.DOM(sinks.DOM);
}

run(main, drivers);