JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test">Should be green -- using .data</div>
<div id="test2">Should be green -- using .attr</div>

CSS

.bug-type {color:green}

JavaScript

$("#test").data("issuetype", "bug");
$("#test2").attr("data-issuetype", "bug");

$("[data-issuetype=bug]").each(function () {
    $(this).addClass("bug-type");
});