JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <button id="show-menu">Show Menu</button>
    <div id="menu">
        <input type="text" class="to-focus">
    </div>
</div>

CSS

#menu {
    display: none;
}

JavaScript

$(function () {
    $('#show-menu').click(function () {
        $menu = $('#menu')
        $menu.show()
        $menu.find('input.to-focus').focus();
    });
});