A slightly biased comparison of ES7 async/await (a la C#) vs ES6 promises. The idea is to delay the return of data, simulating a a request/response from a server.

mock-api-es6.js

const mockAPI = {

  provideResponse(dataToProvide) {

    const timeout = Math.round(Math.random() * (3000 - 500)) + 500;

    const retVal = new Promise((resolve, reject)=> {
      setTimeout(() => {
        resolve(dataToProvide);
      }, timeout);

    });

    return retVal;
  }
};

export default mockAPI;

mock-api-es7.js

import sleep from './sleep';

const mockAPI = {

  async provideResponse(dataToProvide) {

    const timeout = Math.round(Math.random() * (3000 - 500)) + 500;

    await sleep(timeout);

    return dataToProvide;
  }
};

export default mockAPI;

sleep.js

//https://gist.github.com/danharper/74a5102363fbd85f6b67
export default function (ms = 0) {
  return new Promise(r => setTimeout(r, ms));
};