transfer.sh/transfersh-web/scripts/main.js

$(document).ready(function() {

    // Smooth scrolling
    $('a[href*=#]:not([href=#])').click(function() {
        if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {
            var target = $(this.hash);
            target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
            if (target.length) {
                $('html,body').animate({
                    scrollTop: target.offset().top
                }, 1000);
                return false;
            }
        }
    });

});

(function() {
    var files = Array()
    var queue = Array()

    $(window).bind('beforeunload', function(){
        if (queue.length==0) 
            return;

        return 'There are still ' + queue.length + 'files being uploaded.';
    });

    function upload(file) {
        $('.browse').addClass('uploading');

        var li = $('<li style="clear:both;"/>');

        li.append($('<div><div class="upload-progress"><span></span><div class="bar" style="width:0%;">####################################################</div></div><p>Uploading... ' + file.name + '</p></div>'));
        $(li).appendTo($('.queue'));

        var xhr = new XMLHttpRequest();

        xhr.upload.addEventListener("progress", function(e) {
            var pc = parseInt((e.loaded / e.total * 100));
            $('.upload-progress', $(li)).show();
            $('.upload-progress .bar', $(li)).css('width', pc + "%");
            $('.upload-progress span  ').empty().append(pc + "%");
   

     $(window).bind('beforeunload', function(){
  return 'File are still uploading';
});
        }, false);

        xhr.onreadystatechange = function(e) {
            if (xhr.readyState == 4) {
                /*            $('.upload-progress', $(li)).hide();*/
                $('#web').addClass('uploading');
                // progress.className = (xhr.status == 200 ? "success" : "failure");
                if (xhr.status == 200) {
                    $(li).html('<a target="_blank" href="' + xhr.responseText + '">' + xhr.responseText + '</a>');
                } else {
                    $(li).html('<span>Error (' + xhr.status + ') during upload of file ' + file.name + '</span>');
                }

                var index = queue.indexOf(xhr);
                if (index > -1) {
                    queue.splice(index, 1);
                }

                files.push(URI(xhr.responseText.replace("\n", "")).path());

                $(".download-zip").attr("href", URI("(" + files.join(",") + ").zip").absoluteTo(location.href).toString());
                $(".download-tar").attr("href", URI("(" + files.join(",") + ").tar.gz").absoluteTo(location.href).toString());

                $(".all-files").addClass('show');
            }
        };

        // should queue all uploads. 
        queue.push(xhr);

        // start upload
        xhr.open("PUT", '/' + file.name, true);
        xhr.setRequestHeader("X_FILENAME", file.name);
        xhr.send(file);
    };

    $(document).bind("dragenter", function(event) {
        event.preventDefault();
    }).bind("dragover", function(event) {
        event.preventDefault();
        // show drop indicator
        $('#terminal').addClass('dragged');
        $('#web').addClass('dragged');
    }).bind("dragleave", function(event) {
        $('#terminal').removeClass('dragged');
        $('#web').removeClass('dragged');

    }).bind("drop dragdrop", function(event) {
        var files = event.originalEvent.target.files || event.originalEvent.dataTransfer.files;

        $.each(files, function(index, file) {
            upload(file);
        });

        event.stopPropagation();
        event.preventDefault();
    });

    $('a.browse').on('click', function(event) {
        $("input[type=file]").click();
        return (false);
    });


    $('input[type=file]').on('change', function(event) {
        $.each(this.files, function(index, file) {
            if (file instanceof Blob) {
                upload(file);
            }
        });
    });   

    // clipboard 
    if (window.location.href.indexOf("download") > -1 ) {


        (function() {
            var copylinkbtn = document.getElementById("copy-link-btn"),
                copylink = document.getElementById("copy-link-wrapper"),
                overlay = document.getElementById("overlay");

            var url = "http://url"
            copylinkbtn.addEventListener("click", function() {

                var error = document.getElementsByClassName('error');

                while (error[0]) {
                    error[0].parentNode.removeChild(error[0]);
                }

                document.body.className += ' active';

                copylink.children[1].value = url;
                copylink.children[1].focus();
                copylink.children[1].select();
            }, false);

            overlay.addEventListener("click", function() {
                document.body.className = '';
            }, false);

            copylink.children[1].addEventListener("keydown", function(e) {

                var error = document.getElementsByClassName('error');

                while (error[0]) {
                    error[0].parentNode.removeChild(error[0]);
                }

                setTimeout(function() {

                    if ((e.metaKey || e.ctrlKey) && e.keyCode === 67 && isTextSelected(copylink.children[2])) {
                        document.body.className = '';
                    } else if ((e.metaKey || e.ctrlKey) && e.keyCode === 67 && isTextSelected(copylink.children[2]) === false) {
                        var error = document.createElement('span');
                        error.className = 'error';
                        var errortext = document.createTextNode('The link was not copied, make sure the entire text is selected.');

                        error.appendChild(errortext);
                        copylink.appendChild(error);
                    }
                }, 100);

                function isTextSelected(input) {
                    if (typeof input.selectionStart == "number") {
                        return input.selectionStart == 0 && input.selectionEnd == input.value.length;
                    } else if (typeof document.selection != "undefined") {
                        input.focus();
                        return document.selection.createRange().text == input.value;
                    }
                }
            }, false);
        })();
    };

})();