JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.21/themes/base/jquery-ui.css">
<div class="smallBox">
        <label for="retirmntSpendingX">
            Retirement Age:</label>
        <b><span id="retirmntSpendingX"></span></b>
        <br />
        <br />
        <br />
        <div id="retirmntSpending" class="slider">
        </div>
    </div>

CSS

/* DEFAULTS
----------------------------------------------------------*/

body
{
    background: #b6b7bc;
    font-size: .80em;
    font-family: "Helvetica Neue" , "Lucida Grande" , "Segoe UI" , Arial, Helvetica, Verdana, sans-serif;
    margin: 0px;
    padding: 0px;
    color: #696969;
}

a:link, a:visited
{
    color: #034af3;
}

a:hover
{
    color: #1d60ff;
    text-decoration: none;
}

a:active
{
    color: #034af3;
}

p
{
    margin-bottom: 10px;
    line-height: 1.6em;
}

.tabPrev
{
    background-color: paleturquoise;
    border: 1px solid black;
    float: left;
    cursor: pointer;
}

.tabNext
{
    background-color: paleturquoise;
    border: 1px solid black;
    float: right;
    cursor: pointer;
}

#MainBox
{
    height: 510px;
    background-color: #fff;
    border: 1px solid black;
    margin: 20px auto 0px auto;
}

/* sectional box inside tabs*/
.subBox
{
    width: auto;
    height: 100px;
    margin: 2px auto 0px auto;
}

/* box in side sectional box*/
.smallBox
{
    width: 170px;
    height: 97px;
    float: left;
    border-left: 1px dotted gray;
    background-color: #CCFFFF;
    margin: 2px 10px 2px 10px;
}

.slider
{
    width: auto; /*200px;*/ 
    /*padding: 10px;*/
    /*height: 10px;*/
    
}
.plusMinusBox
{
    width: 120px;
    height: 25px;
    margin-left: 30px;
}
.plusMinusBox .yrsMinus
{
    float: left;
    width: 20px;
    height: 20px;
    background-color: #819FF7;
    font-weight: bold;
    font-size: 11;
    border: black solid 1px;
    cursor: pointer;
}
.plusMinusBox .yrsDisplay
{
    float: left;
    width: 70px;
    height: 20px;
    background-color: mediumturquoise;
    font-size: 8;
    border: black solid 1px;
}
.plusMinusBox .yrsPlus
{
    float: left;
    width: 20px;
    height: 20px;
    background-color: #819FF7;
    font-weight: bold;
    font-size: 11;
    border: black solid 1px;
    cursor: pointer;
}

JavaScript

$(document).ready(function () {
            makeSingleSlider('retirmntSpending', 1, 40, 20, 1);
        }
        );
      function makeSingleSlider(sliderId, minimum, maximum, val, steps) {
            //Display label shud have a X appended
            $('#' + sliderId).slider(
                {
                 
                    min: minimum,
                    max: maximum,
                    step: steps,
                    //starting values for silders
                    value: val,
                    slide: function (event, ui) {
                        $("#" + sliderId + "X").text(ui.value);
                    }
                }
            );
        }