JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>666</li>
    <li>555</li>
    <li>444</li>
    <li>333</li>
    <li>222</li>
    <li>111</li>
</ul>

JavaScript

$(window).resize(function () {
    if ($(window).width() <= 767) {
        $('ul').append( $.makeArray( $('ul li') ).reverse() );
    }
});