JSFiddle - React, Tailwind, and code Playground

HTML

<div class="a">Hello</div>
<div class="a">Stack</div>
<div class="a">Overflow</div>

CSS

.wrapper {
    background-color: #777;
}

JavaScript

$(function() {
    var wrapper = $("<div class='wrapper'></div>");
    $(".a").wrapAll(wrapper);
    wrapper.css("border", "5px solid black");
    //$(".wrapper").css("border", "5px solid black");
});