JSFiddle - React, Tailwind, and code Playground

HTML

<!-- open me in Opera-->
<ul>
    <li></li> 
    <li disabled></li>
    <li disabled="disabled"></li>
    <li disabled=""></li> 
</ul>

<div />

JavaScript

$("li").each(function(i, e) {
    $("<span />")
    .text($(e).is('[disabled]') + "; ")
    .appendTo("div")
});