JSFiddle - React, Tailwind, and code Playground

HTML

<div id="dialog" title="Example">
    <select>
        <option value="1">Test 1</option>
        <option value="2">Test 2</option>

    </select>
    <br />
    <div id="whitespace"></div>
    <input type="button" class="mySubmitButton" id="submit" value="Submit" />
</div>
<input type="button" class="myButton" id="target" value="Test" />

CSS

#whitespace {
    padding-top: 2cm;
}

.myButton {
	-moz-box-shadow:inset 0px 1px 0px 0px #cf866c;
	-webkit-box-shadow:inset 0px 1px 0px 0px #cf866c;
	box-shadow:inset 0px 1px 0px 0px #cf866c;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #d0451b), color-stop(1, #bc3315));
	background:-moz-linear-gradient(top, #d0451b 5%, #bc3315 100%);
	background:-webkit-linear-gradient(top, #d0451b 5%, #bc3315 100%);
	background:-o-linear-gradient(top, #d0451b 5%, #bc3315 100%);
	background:-ms-linear-gradient(top, #d0451b 5%, #bc3315 100%);
	background:linear-gradient(to bottom, #d0451b 5%, #bc3315 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#d0451b', endColorstr='#bc3315',GradientType=0);
	background-color:#d0451b;
	-moz-border-radius:3px;
	-webkit-border-radius:3px;
	border-radius:3px;
	border:1px solid #942911;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:16px;
	padding:8px 24px;
	text-decoration:none;
	text-shadow:0px 1px 0px #854629;
}
.myButton:hover {
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #bc3315), color-stop(1, #d0451b));
	background:-moz-linear-gradient(top, #bc3315 5%, #d0451b 100%);
	background:-webkit-linear-gradient(top, #bc3315 5%, #d0451b 100%);
	background:-o-linear-gradient(top, #bc3315 5%, #d0451b 100%);
	background:-ms-linear-gradient(top, #bc3315 5%, #d0451b 100%);
	background:linear-gradient(to bottom, #bc3315 5%, #d0451b 100%);
	filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#bc3315', endColorstr='#d0451b',GradientType=0);
	background-color:#bc3315;
}
.myButton:active {
	position:relative;
	top:1px;
}

/* Submit button in popup */

.mySubmitButton {
	-moz-box-shadow:inset 0px 1px 0px 0px #9acc85;
	-webkit-box-shadow:inset 0px 1px 0px 0px #9acc85;
	box-shadow:inset 0px 1px 0px 0px #9acc85;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #74ad5a), color-stop(1,...

JavaScript

$("#dialog").hide();
$("#target").click(function () {
    $("#dialog").show();
    $("#dialog").dialog();
});
$("#submit").submit();
$(document).ready(function () {
    $('#submit').ajaxForm(function () {
        window.close();
    });
});