JSFiddle - React, Tailwind, and code Playground

HTML

<form action="#" method="post">
    <label>Hit enter in this input<input type="text" /></label>
    <div class="asset-widget">
        <a href="/admin/asset_folder/browsePopupRoot" title="">
            <img src="https://www.google.com/images/srpr/logo4w.png" alt="file" alt="" width="150" />&nbsp;
            <span>production.png</span>
            <br />
            <input type="hidden" id="activity_asset" name="ctivity[asset]" value="27" />
            <button class="btn">Open popup</button>
        </a>
    </div>
    <input type="submit" />
</form>

JavaScript

jQuery(document).ready(function () {
    jQuery(document).on('click', '.asset-widget a', function (e) {
        e.preventDefault();
        alert('Hello');
    });
});