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Trigger click event of input file from external button

Click event of input file from the external button can be triggered using the click event of button. In the following sample, you can find the triggered click event of input file from Essential JavaScript 2 Button.

Source
Preview
app.ts
index.html
import { Uploader } from '@syncfusion/ej2-inputs';

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

document.getElementById('browse').onclick = () => {
    document.getElementsByClassName('e-file-select-wrap')[0].querySelector('button').click();
};
<!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'>
            <div class="control_wrapper">
                <!-- Initialize Uploader -->
                <div id="dropArea">
                    <span id="drop"> Drop image (JPG, PNG) files here or <button class='e-btn e-control' id="browse">Browse</button></span>
                </div>
                <input type="file" name="UploadFiles" id="fileupload">
            </div>
        </div>
    </div>
</body>
</html>