JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/jquery-ui-git.css">
<script src="http://code.jquery.com/ui/jquery-ui-git.js"></script>
<div id="autocomplete"></div>

JavaScript

var element = $( "#autocomplete" ).autocomplete({
        disabled: true
    }),
    menu = element.autocomplete( "widget" );

console.log(menu.is( ".ui-state-disabled" ));

element.autocomplete( "disable" );

console.log(menu.is( ".ui-state-disabled" ));