1const fileInput = document.querySelector('#your-file-input') ;
2const formData = new FormData();
3
4formData.append('file', fileInput.files[0]);
5
6const options = {
7  method: 'POST',
8  body: formData,
9  // If you add this, upload won't work
10  // headers: {
11  //   'Content-Type': 'multipart/form-data',
12  // }
13};
14
15fetch('your-upload-url', options);
16