How to get file name for failed request in JSOM

Question

hello friends,
i am uploading files to sharepoint 2013 document library. due to some problem when a file is not uploaded request is failed and failed callback handler is executed. at this time how i can know for which file has not been uploaded.
as i am uploading multiple files so it is necessary to know for which file error occurs.
please help 
Thanks in advance.
Mukesh

Answer 1

Hi Z..
it will be hard for any one to understand the code. how ever I have provided bellow.
theme is I need to upload multiple files selecting one by one asynchronously when a file will begin to upload It will show status of file name with processing image. similarly for other files.
ones file successfully uploaded processing image will get hidden. and delete will appear.
when error occurs for a file then processing div need to be removed for which I need file name when request failed. in failed handler
function uploadData()
var input = $("#fldFile")[0];
if (input) {
$("#uploadedfile").append("<div class='file'><label>" + input.files[0].name + "</label><div class='image'><img src='/_layouts/15/KPMG.VendorPortal.DMS/processing.gif' alt='processing..'/><img src='/_layouts/15/KPMG.VendorPortal.DMS/error.png' alt='delete' style='display:none;' /></div>");
file = input.files[0];
filename = input.files[0].name;
fr = new FileReader();
fr.onload = uploaddocument;
fr.readAsDataURL(file);
function uploaddocument()
web = clientContext.get_web();
clientContext.load(web);
list = web.get_lists().getByTitle("TempLibrary");
rootFolderUrl = list.get_rootFolder();
file = this.result;
clientContext.load(rootFolderUrl);
clientContext.executeQueryAsync(onuploaddocumentsuccess, failed);
function onuploaddocumentsuccess()
fileCreateInfo = new SP.FileCreationInformation();
fileCreateInfo.set_url(rootFolderUrl.get_serverRelativeUrl() + "/" + foldername + "/" + filename);
fileCreateInfo.set_overwrite(true);
fileCreateInfo.set_content(new SP.Base64EncodedByteArray());
// Read the binary contents of the base 64 data URL into a Uint8Array
// Append the contents of this array to the SP.FileCreationInformation
var arr = convertDataURIToBinary(file);
for (var i = 0; i < arr.length; ++i) {
fileCreateInfo.get_content().append(arr[i]);
// Upload the file to the root folder of the document library
uploadedfile= list.get_rootFolder().get_files().add(fileCreateInfo);
clientContext.load(uploadedfile);
clientContext.executeQueryAsync(documentuploaded, documentfailed);
function documentuploaded()
var fname = uploadedfile.get_name();
$("#uploadedfile").children("div").each(function () {
var flabelname = $(this).children("label").text();
if (flabelname.trim() == fname.trim())
$(this).children("div").children("img").get(0).style.display="none";
$(this).children("div").children("img").get(1).style.display="block";
alert("uploaded");
function documentfailed(sender,args)
Mukesh