JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://brianreavis.github.io/selectize.js/js/selectize.js"></script>
<link rel="stylesheet" href="http://brianreavis.github.io/selectize.js/css/selectize.default.css">
<input id="tags">

JavaScript

$(function() {
    $("#tags").selectize({
        create: true
    })
    
    var selectize_tags = $("#tags")[0].selectize
    selectize_tags.createItem("foo")
    selectize_tags.refreshItems()
})