JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<script src="http://diplomaphp.herokuapp.com/js/dropzone.min.js"></script>
<div class="file_area"></div>

JavaScript

$(".file_area").dropzone({
    url: '/echo/json/', //url for the ajax to post
    width: 300, //width of the div
    height: 300, //height of the div
    progressBarWidth: 300, //width of the progress bars
    filesName: 'files', //name for the form submit
    margin: 0, //margin added if needed
    border: '2px dashed #ccc', //border property
    background: '',
    textColor: '#ccc', //text color
    textAlign: 'center', //css style for text-align
    lineHeight: 300, //vertical text align
    text: 'Drop files here to upload', //text inside the div
    uploadMode: 'single', //upload all files at once or upload single files, options: all or single
    progressContainer: '', //progress selector if null one will be created

    dropzoneWraper: 'nniicc-dropzoneParent', //wrap the dropzone div with custom class
    files: [], //Access to the files that are droped
    maxFileSize: '10MB', //max file size ['bytes', 'KB', 'MB', 'GB', 'TB']
    allowedFileTypes: '*', //allowed files to be uploaded seperated by ',' jpg,png,gif
    clickToUpload: true, //click on dropzone to select files old way
    showTimer: true, //show time that has elapsed from the start of the upload,
    removeComplete: true, //delete complete progress bars when adding new files

    //functions
    load: function(){
        console.log("render done");
    }, //callback when the div is loaded
    /*progress: function(percent, index){
        console.log(percent, index);
        $(".progress-"+index).children().css("width", percent+"%").html(percent.toFixed(0)+"%");
    }, //callback for the files procent*/
    uploadDone: function(){
        alert("Upload done");
    }
});