File upload using ftp and electron - node.js

Question

I'm new to StackOverflow. I have started an electron project and I want to implement inside it the ability for the user to upload files using FTP. I've googled a bit and I've found a nice node module jsftp that is fit all my needs. The problem is that I'm new to electron and node coding, and I don't know how to manage the file upload. I've tried to use a standard file input but without success. My question is, how I can implement the file selection from the user and then upload the selected file to the FTP server?
Here is my code snippet:
HTML
<!-- Upload form row -->
<div class="row justify-content-center" id="">
<div class="col-8">
<form method="POST" action="/process-form" enctype="multipart/form-data" id="file-uploader">
<div class="form-row">
<div class="col-6">
<label for="file_name">File name</label>
<input type="text" class="form-control" id="file-name" name="file_name" placeholder="Nome file" />
</div>
<div class="col-6">
<label>Select file</label>
<div class="custom-file">
<input type="file" class="custom-file-input" name="uploaded_file" id="customFile" />
<label class="custom-file-label" for="customFile">Seleziona file</label>
</div>
</div>
<div class="col-12">
<label for="file_description">Description</label>
<textarea class="form-control" name="file_description" placeholder="Descrizione"></textarea>
</div>
<div class="col-12">
<button type="submit" name="upload_file" class="btn btn-link" id="process-form">UPLOAD</button>
</div>
</div>
</form>
</div>
</div>
JS code:
<!-- init app and xhr requests-->
<script type="text/javascript">
const jsftp = require('jsftp');
const bsCustomFileInput = require('bs-custom-file-input');
let ftp;
$(document).ready(function(){
$('#login-modal').modal('show');
$('#login-form').submit(function(e){
e.preventDefault();
var host = $('#host-field').val();
var user = $('#user-field').val();
var pass = $('#password-field').val();
ftp = new jsftp({
host: host,
port: 21, // defaults to 21
user: user, // defaults to "anonymous"
pass: pass, // defaults to "#anonymous"
});
ftp.list('public_html', (err, res) => {
console.log(res);
});
console.log(ftp);
});
bsCustomFileInput.init();
$('#file-uploader').submit(function(e){
console.log(ftp);
e.preventDefault();
var formData = new FormData($('#file-uploader')[0]);
var filename = $('#file-name').val();
ftp.put(formData, "mysubdomain.testing.net/"+filename+".jpeg", err => {
if(!err){
console.log("File transferred successfully!");
}
else{
console.log(err);
}
});
});
});
</script>