POST /classify

var myHeaders = new Headers();
myHeaders.append("X-RapidAPI-Key", "...");
myHeaders.append("X-RapidAPI-Host", "...");

var formdata = new FormData();
formdata.append("file", fileInput.files[0], "bed_77.jpg");

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: formdata,
  redirect: 'follow'
};

fetch("https://room-identifier1.p.rapidapi.com/classify", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));