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Get the Total Size of Selected Files in JavaScript Uploader control

27 Oct 2021 / 1 minute to read

You can get the total size of selected files before uploading it to the designated server. This can be achieved by using the selected event. Refer to the following example to calculate the total file size.

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app.ts
index.html
index.css
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import {  Uploader, FileInfo, SelectedEventArgs } from '@syncfusion/ej2-inputs';
import { Event } from '@syncfusion/ej2-base';

let uploadObj: Uploader = new Uploader({
    asyncSettings: {
        saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
        removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove'
    },
    selected: onSelect

});
uploadObj.appendTo('#fileupload')

function onSelect(args: SelectedEventArgs): void {
    let totalSize: number = 0;
    for (let file of args.filesData) {
        totalSize = totalSize + file.size;
    }
    let size: string = uploadObj.bytesToSize(totalSize);
    alert("Total select file's size is " + size);
}
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<!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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>
<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <input type="file" id="fileupload" name="UploadFiles"/>
    </div>
</body>
</html>
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#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%;
}

You can also explore JavaScript File Upload feature tour page for its groundbreaking features. You can also explore our JavaScript File Upload example to understand how to browse the files which you want to upload to the server.