JSFiddle - React, Tailwind, and code Playground

HTML

<div data-foo="12"></div>
<div data-foo="13"></div>
<div data-foo="14"></div>
<div data-foo="15"></div>
<div data-foo="16"></div>
<div data-foo="17"></div>
<div data-foo="18"></div>

JavaScript

$("div[data-foo]").each(function () {
    alert($(this).data("foo"));
});