using fetch api

var opts = {
  method: 'GET',
  body: 'json',
  headers: {}
};
fetch('/get-data', opts).then(function (response) {
  return response.json();
})
.then(function (body) {
  //doSomething with body;
});

// <script src="https://cdn.rawgit.com/github/fetch/master/fetch.js"><script>