Promise.all usage with node-fetch sample code.

gistfile1.txt

#!/usr/bin/env node
'use stict';

const fetch = require('node-fetch');

const urls = ['http://jsonplaceholder.typicode.com/posts/1',
    'http://jsonplaceholder.typicode.com/posts/2',
    'http://jsonplaceholder.typicode.com/posts/3',
    'http://jsonplaceholder.typicode.com/posts/a',
    'http://jsonplaceholder.typicode.com/posts/5'
];

const policyChanges = [];
urls.forEach((v, i, a)  => {
  policyChanges.push(fetch(a[i]).then(res => res.ok ? res.json() : Promise.reject(`FetchError: request to ${a[i]} returned: ${res.statusText}`)));
});

const processPolicyChanges = async(policyChanges) => {
    const responses = await Promise.all(policyChanges).catch(err => console.log(`${err}`));
    if (responses) { //If any promise fails responses will be undefined.
      responses.map((res) => console.log(res));
    } else {
      console.log(`DEPLOYMENT FAILED!!!`);
    }
}

processPolicyChanges(policyChanges);