An example of orchestrating the service.

main.js

// In your initialize code:
import React from 'react';
import ReactDOM from 'react-dom';
import FetchData from './fetch-data'; // Your data-fetching service.
import Component from './component';

ReactDOM.render(<Component {...props} />, domElement, 
  function loadData() {
    // this points to your component instance here.
    FetchData().then(data => {
      this.setState({ data });
    });
  });