JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css">
<div class="preview-image-container" style="cursor: default;">
  <input type="file" name="File" id="File" class="image-url form-control" accept="image/*" style="display:none;">
  <div class="preview-image-dummy"></div><img class="preview-image-url">
  <div class="preview-image-instruction" style="background-color: inherit; cursor: default;"><i class="fa fa-4x fa-cloud-upload" aria-hidden="true"></i>
    <div class="preview-image-btn-browse btn btn-primary">Browse</div>
    <p>or drop a file here.</p>
  </div>
</div>

CSS

.preview-image-container {
  display: inline-block;
  position: relative;
  width: 100%;
  max-width: 100%;
  border: 2px dotted #bbb;
  border-radius: 5px;
}

.preview-image-dummy {
  margin-top: 75%;
}

.preview-image-url {
  display: block;
  margin: auto;
  max-width: 100%;
  max-height: 100%;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.preview-image-container .close {
  position: absolute;
  top: 2px;
  right: 2px;
  z-index: 2;
  background-color: #FFF;
  padding: 5px 2px 2px;
  color: #000;
  font-weight: bold;
  cursor: pointer;
  opacity: .2;
  text-align: center;
  font-size: 22px;
  line-height: 10px;
  border-radius: 50%;
}

.preview-image-container:hover .close {
  opacity: 1;
}

.preview-image-instruction {
  text-align: center;
  display: block;
  margin: auto;
  max-width: 100%;
  max-height: 100%;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.preview-image-instruction > i {
  margin-top: 15%;
}

.preview-image-btn-browse {
  display: table;
  margin: auto;
}

JavaScript

function readURL(input) {
  if (input.files && input.files[0]) {
    ShowThumbnail(input.files[0], input);
  }
}

$("input.image-url:file").change(function() {
  readURL(this);
  var i = $("input.image-url:file").files.length;
  console.log(i);
});

$(".preview-image-container").on('dragover', dragover_handler);
$(".preview-image-container").on('dragleave', dragleave_handler);
$(".preview-image-container").on('drop', drop_handler);
$(".image-url-delete").on('click', delete_handler);

$('.preview-image-btn-browse').click(function() {
  $(this).closest('.preview-image-container').find('.image-url').trigger('click');
});

function dragleave_handler(ev) {
  $(ev.target).css("backgroundColor", "");
  $(ev.target).css("cursor", "default");
}

function dragover_handler(ev) {
  // Prevent default select and drag behavior
  ev.preventDefault();
  var dt = ev.originalEvent.dataTransfer;
  dt.dropEffect = "move";

  if (dt.types && (dt.types.indexOf ? dt.types.indexOf('Files') != -1 : dt.types.contains('Files'))) {
    $(ev.target).css("backgroundColor", "#87CEFA");
    $(ev.target).css("cursor", "pointer");
  }
}

function drop_handler(ev) {
  ev.preventDefault();
  var target = $(ev.target);
  target.css("backgroundColor", "inherit");
  target.css("cursor", "default");
  HideInstruction(target);
  // If dropped items aren't files, reject them
  var dt = ev.originalEvent.dataTransfer;
  if (dt.items && dt.items[0]) {
    // Use DataTransferItemList interface to access the file(s)
    if (dt.items[0].kind == "file") {
      var f = dt.items[0].getAsFile();
      ShowThumbnail(f, target);
    }
  } else {
    // Use DataTransfer interface to access the file(s)
    if (dt.files && dt.files[0]) {
      ShowThumbnail(dt.files[0], target);
    }
  }
}


function ShowThumbnail(file, previewDOM) {
  var reader = new FileReader();

  reader.onload = function(e) {
    var imagePreview = $(previewDOM).siblings('.preview-image-url');
    imagePreview.attr('src', e.target.result);
   ...