const fetchData = () => {
  const urls = [
    "https://jsonplaceholder.typicode.com/posts/1",
    "https://jsonplaceholder.typicode.com/posts/2",
    "https://jsonplaceholder.typicode.com/posts/3",
    "https://jsonplaceholder.typicode.com/posts/4",
    "https://jsonplaceholder.typicode.com/posts/5",
    "https://jsonplaceholder.typicode.com/posts/6",
    "https://jsonplaceholder.typicode.com/posts/7",
    "https://jsonplaceholder.typicode.com/posts/8"
  ];

  const allRequests = urls.map(url => 
  fetch(url).then( response => response.json() ).then( json => ( {url, json } ) )
);

  return Promise.all(allRequests);
};

fetchData().then(r => console.log(r));