let req = new XMLHttpRequest();

req.onreadystatechange = () => {
  if (req.readyState == XMLHttpRequest.DONE) {
    console.log(req.responseText);
  }
};

req.open("POST", "https://api.jsonbin.io/c", true);
req.setRequestHeader("Content-Type", "application/json");
req.send('{"name": "Sample Collection"}');