send/frontend/src/upload.js

const FileSender = require('./fileSender');

$(document).ready(function(){
  let copyBtn = $('#copy-btn');
  copyBtn.attr("disabled", false);
  copyBtn.html("Copy");
  $('#page-one').show();
  $('#file-list').hide();
  $('#upload-progress').hide();
  $('#share-link').hide();

  copyBtn.click(()=>{
    console.log("copied");
    var aux = document.createElement("input");
    aux.setAttribute("value", $('#link').attr("value"));
    document.body.appendChild(aux);
    aux.select();
    document.execCommand("copy");
    document.body.removeChild(aux);
    copyBtn.attr("disabled", true);
    copyBtn.html("Copied!");
  });
  $('.send-new').click(()=>{
    $('#page-one').show();
    $('#file-list').show();
    $('#upload-progress').hide();
    $('#share-link').hide();
    copyBtn.attr("disabled", false);
    copyBtn.html("Copy");
  });

  let onChange = event => {
    const file = event.target.files[0];

    let fileList = $('#uploaded-files');
    let row = document.createElement('tr');
    let name = document.createElement('td');
    let link = document.createElement('td');
    let expiry = document.createElement('td');

    let cellText = document.createTextNode(file.name);

    name.appendChild(cellText);

    let progress = document.createElement('p');

    row.appendChild(name);
    row.appendChild(link);
    row.appendChild(expiry);
    fileList.append(row);

    const fileSender = new FileSender(file);
    fileSender.on('progress', percentComplete => {
      $('#page-one').hide();
      $('#file-list').hide();
      $('#upload-progress').show();
      $('#upload-filename').innerHTML += file.name;
      progress.innerText = `Progress: ${percentComplete}%`;
    });
    fileSender.upload().then(info => {
      const url = `${window.location
        .origin}/download/${info.fileId}/#${info.secretKey}`;
        $('#link').attr("value", url);
        link.innerHTML = url;
        localStorage.setItem(info.fileId, info.deleteToken);
        let del = document.createElement('td');
        let btn = document.createElement('button');
        btn.innerHTML = 'x';
        btn.classList.add('delete-btn');
        btn.addEventListener('click', (e) => {
          FileSender.delete(
            info.fileId,
            localStorage.getItem(info.fileId)
          ).then(() => {
            e.target.parentNode.parentNode.remove();
            localStorage.removeItem(info.fileId);
          });
        });
        del.appendChild(btn);
        row.appendChild(del);
        $('#upload-progress').hide();
        $('#share-link').show();
      });
    };

    window.onChange = onChange;
  });