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Sort the Selected Files in JavaScript (ES5) Uploader control

You can sort the selected files in uploader component by using the selected event. Refer to the following example.

Source
Preview
index.js
index.html
index.css
// initialize Uploader component
var uploadObject = new ej.inputs.Uploader({
    asyncSettings: {
        saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
        removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove'
    },
    selected: onSelect
});

uploadObject.appendTo('#fileupload');

function onSelect(args) {    
    if (initial) { initial = false; return; }
    args.isModified = true;
    var oldFiles = uploadObj.getFilesData();
    var filesData = args.filesData.concat(oldFiles);
    var modifiedData = sortFileList(filesData);
    args.modifiedFilesData = modifiedData;
}

function sortFileList(filesData) {
    var files = filesData;
    var fileNames = [];
    for (var i = 0; i < files.length; i++) {
        fileNames.push(files[i].name);
    }
    var sortedFileNames = fileNames.sort();
    var sortedFilesData = [];
    var index = 0;
    for (var i = 0; i < sortedFileNames.length; i++) {
        var name = sortedFileNames[i];
        for (let i = 0; i < files.length; i++) {
            if (name === files[i].name) {
                sortedFilesData.push(files[i]);
            }
        }
    }
    return sortedFilesData;
}
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 Uploader</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Essential JS 2 Uploader Component">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
    
    <div id="container">
        <input type="file" id="fileupload" name="UploadFiles">
    </div>

<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>
#container {
  visibility: hidden;
  margin: 0 auto;
  width: 300px;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}