JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">

JavaScript

jQuery.fn.ioFormSelect = function(options) {
    settings = jQuery.extend({
        'maxOptions': 8,
        'fieldClass': 'ui-field-select',
        'selectedClass': 'ui-field-selected',
        'openClass': 'ui-field-select-open',
        'closeClass': 'ui-field-select-close',
        'disabledClass': 'ui-field-disabled',
        'optionClass': 'ui-field-option',
        'optionGroupClass' : 'ui-field-option-group'
    }, options);
};

$("body").ioFormSelect();
alert(window.settings.maxOptions);