JavaScript Answers

How to open the select file dialog via JavaScript?

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To open the file select dialog via JavaScript, we can trigger a click event on an <input type="file"> element.

To do this, we:


<input type="file" id="fileInput" style="display: none;">
<button onclick="openFileDialog()">Open File Dialog</button>


function openFileDialog() {
    // Trigger a click event on the file input element
    var fileInput = document.getElementById('fileInput');;

    // Add an event listener to handle file selection
    fileInput.addEventListener('change', handleFileSelect);

function handleFileSelect(event) {
    // Handle the selected file(s) here
    var selectedFiles =;

In this example, clicking the button triggers the openFileDialog function, which programmatically clicks the <input type="file"> element.

This action opens the file select dialog. When a file is selected, the handleFileSelect function is called, where we can handle the selected file(s) as needed.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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