JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/handsontable/0.20.0/handsontable.full.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/handsontable/0.20.0/handsontable.full.min.css">
<div id="example1"></div>

JavaScript

(function(Handsontable) {
    var SelectEditor = Handsontable.editors.BaseEditor.prototype.extend();

    SelectEditor.prototype.init = function() {
        // Create detached node, add CSS class and make sure its not visible
        this.select = document.createElement('SELECT');
        Handsontable.Dom.addClass(this.select, 'htSelectEditor');
        this.select.style.display = 'none';

        // Attach node to DOM, by appending it to the container holding the table
        this.instance.rootElement.appendChild(this.select);
    };
    // Create options in prepare() method
    SelectEditor.prototype.prepare = function() {
        // Remember to invoke parent's method
        Handsontable.editors.BaseEditor.prototype.prepare.apply(this, arguments);
        this.isMultiple = !!this.cellProperties.multiple;
        if (this.isMultiple) this.select.multiple = true;
        var selectOptions = this.cellProperties.selectOptions;
        var options;

        if (typeof selectOptions == 'function') {
            options = this.prepareOptions(selectOptions(this.row,
                this.col, this.prop))
        } else {
            options = this.prepareOptions(selectOptions);
        }
        Handsontable.Dom.empty(this.select);

        for (var option in options) {
            if (options.hasOwnProperty(option)) {
                var optionElement = document.createElement('OPTION');
                optionElement.value = option;
                Handsontable.Dom.fastInnerHTML(optionElement, options[option]);
                this.select.appendChild(optionElement);
            }
        }
    };
    SelectEditor.prototype.prepareOptions = function(optionsToPrepare) {
        var preparedOptions = {};

        if (Array.isArray(optionsToPrepare)) {
            for (var i = 0, len = optionsToPrepare.length; i < len; i++) {
                preparedOptions[optionsToPrepare[i]] = optionsToPrepare[i];
            }
        } else if (typeof optionsToPrepare == 'object') {
...