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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
index.js
index.html
ej.base.enableRipple(true);

//Initialize the control by preload files
var uploadObj = new ej.inputs.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 = function() {
    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://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
    
        <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>
    

<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>