question about creating custom App

[admin]

Use this JavaScript as a starting point:

Code:

async function send() {
  var formdata = new FormData();
  var url = '/scada-main/general/restore';
  var el = document.getElementById('file');

  formdata.append('file', el.files[0]);

  var resp = await fetch(url, {
    method: 'POST',
    headers: { 'X-Requested-With': 'XMLHttpRequest' },
    body: formdata
  });

  var res = await resp.json();
  console.log(res);
}