text: fetch("http://mockbin.com/har", {
    "method": "POST",
    "headers": {
      "content-type": "text/plain"
    },
    "body": "Hello World"
  })
  .then(response => response.json())
  .then(response => {
    console.log(response);
  })
  .catch(err => {
    console.error(err);
  });
  