uppy/src/components/dragdrop.hbs

<form class="UppyDragDrop-form"
      method="post"
      action="/"
      enctype="multipart/form-data">
    <img class="UppyDragDrop-puppy" src="/images/uppy.svg" />
    <input class="UppyDragDrop-input"
           type="file"
           name="files[]"
           data-multiple-caption="{count} files selected"
           multiple />
    <label class="UppyDragDrop-label" for="UppyDragDrop-input">
      <strong>{{ chooseFile }}</strong>
      <span class="UppyDragDrop-dragText">{{ orDragDrop }}</span>.
    </label>
    <button class="UppyDragDrop-btn" type="submit">Upload</button>
  <div class="UppyDragDrop-status"></div>
</form>