Add the CDN references below into the DOM Header Insertions section of your site.
<!--rangeSlider CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ion-rangeslider/2.3.0/css/ion.rangeSlider.min.css"/>
<!--Plugin JavaScript file-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/ion-rangeslider/2.3.0/js/ion.rangeSlider.min.js"></script>
{
"label": "Rank",
"styleClasses": "col-md-12 ",
"max": 10,
"min": 1,
"model": "rank",
"rangeSliderOptions": {
"grid": true
},
"type": "rangeSlider"
}