JSFiddle - React, Tailwind, and code Playground

by Eduardo Flores

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/knockout/3.1.0/knockout-min.js"></script>
<div class="modal fade" tabindex="-1" role="dialog" data-bind="modal:showDialog">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal">&times;</button>
                 <h4 class="modal-title">title</h4>

            </div>
            <div class="modal-body">
                body
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-primary btn-xs" data-bind="click : submit">Close</button>
            </div>
        </div>
    </div>
</div>

<button data-bind="click: function(){showDialog(true)}">Show</button>

JavaScript

ko.bindingHandlers.modal = {
    init: function (element, valueAccessor) {
        $(element).modal({
            show: false
        });

        var value = valueAccessor();
        if (ko.isObservable(value)) {
            // Update 28/02/2018
            // Thank @HeyJude for fixing a bug on
            // double "hide.bs.modal" event firing.
            // Use "hidden.bs.modal" event to avoid
            // bootstrap running internal modal.hide() twice.
            $(element).on('hidden.bs.modal', function() {
               value(false);
            });
        }

        // Update 13/07/2016
        // based on @Richard's finding,
        // don't need to destroy modal explicitly in latest bootstrap.
        // modal('destroy') doesn't exist in latest bootstrap.
        // ko.utils.domNodeDisposal.addDisposeCallback(element, function () {
        //    $(element).modal("destroy");
        // });

    },
    update: function (element, valueAccessor) {
        var value = valueAccessor();
        if (ko.utils.unwrapObservable(value)) {
            $(element).modal('show');
        } else {
            $(element).modal('hide');
        }
    }
}

function PopupViewModel() {
    var self = this;
    this.showDialog = ko.observable(false);

    this.submit = function () {
        alert('submit');
        self.showDialog(false);
    }
}

ko.applyBindings(new PopupViewModel());