Anonymous Upload images to Imgur V3 JS

script.js

var ImgurAPIKey = 'YEAH-IM-NOT-GIVING-THAT';
window.addEventListener('paste', function(e) {
  function eventPreventDefault(e) {
    e.preventDefault();
  }

  function getClipboardData(e) {
    return window.clipboardData || e.clipboardData;
  }

  function resolveItem(item) {
      return {
        "data": item.getAsFile(),
        "tmpname": getTypeFromClipboardItem(item)
      };
  }

  function getTypeFromClipboardItem(item) {
    switch (item.type) {
      case "image/gif":
        return "image.gif";
      case "image/png":
        return "image.png";
      case "image/jpeg":
        return "image.jpg"
    }
  }

  function removeEmpty(item) {
    if (!(item.data && item.tmpname)) {
      return false;
    }
    return (item.data instanceof File);
  }

  function getClipboardFileData(data) {
    if(data.getData) {
      return Array.from(data.items)
        .map(resolveItem)
        .filter(removeEmpty)
        .forEach(function(item) {
          var xhr = new XMLHttpRequest();
          xhr.open('POST', 'https://api.imgur.com/3/image', true);
          xhr.setRequestHeader('Authorization', 'Client-ID '+ImgurAPIKey);
          xhr.onload = function(e) {
            console.log(xhr.response);
          }
          var fd = new FormData();
          fd.append("image", item.data);
          xhr.send(fd);
        });
    }
    return [];
  }

  eventPreventDefault(e);
  items = getClipboardFileData( getClipboardData( e ) );

  return false;
}, true );