JavaScript (ES5)
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Achieve File Upload Programmatically in JavaScript (ES5) Uploader control

You can upload a file programmatically using the upload method. Get the selected files data from the getFilesData public method in uploader.

The upload method behaves differently based on its arguments.

  • If this method receives any files as arguments, those files only start to upload.
  • If it has no argument, all the selected files start to upload.
Source
Preview
index.js
index.html
index.css
ej.base.enableRipple(true);

//Initialize the control by preload files
var uploadObj = new ej.inputs.Uploader({
    autoUpload: false,
    asyncSettings: {
        saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
        removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove'
    }
});
uploadObj.appendTo('#fileupload');

document.getElementById('first').onclick = function (args) {
    uploadObj.upload(uploadObj.getFilesData()[0]);
};

document.getElementById('full').onclick = function (args) {
    uploadObj.upload(uploadObj.getFilesData());
};
<!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">
            <div class="control_wrapper">
                <!-- Initialize Uploader -->
                <input type="file" name="UploadFiles" id="fileupload">
            </div>
            <span style=" padding-left: 40px; margin-top: 30px">
              <button id="first" class="e-btn e-control">Upload first file</button>
            </span>
            <span style=" padding-left: 40px; margin-top: 30px">
              <button id="full" class="e-btn e-control">Upload all files</button>
            </span>
        </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;
}

#loader {
  color: #008cff;
  font-family: 'Helvetica Neue','calibiri';
  font-size: 14px;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}
.control_wrapper {
  max-width: 500px;
  margin: auto;
}
.e-upload {
  width: 100%;
  position: relative;
  margin-top: 15px;
  margin-bottom: 15px;
}
.e-upload-actions {
display: none;
}
.e-btn {
  text-transform: none;
}
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