Hi there, I was able to make it through that thread and get the slider to display. The last comments by bgk were necessary for me to get it working. Attached is a QSF with the noUiSlider working.
noUiSlider_HealthTodayExample.qsf

Hi @Tom_1842 , I was so excited to see someone attached the QSF, but when I click on it, it just reloads the page, do you think you could re upload the QSF?

@MichelleM123 Sure thing!

Hi Tom, Is there a way to have the slider display a blank value until it has been clicked rather than starting at 50?

@cturtle The 50 value can be blanked out by setting the Constant Sum field to ‘’ after the value is updated to 50 by the noUiSlider updating function. Also, you might want to have the noUiSlider handle not display until the track is interacted with so I added some code for that in the OnReady section. Below is the full JS for the question:

Qualtrics.SurveyEngine.addOnload(function() {

//uiSlider
   var vSlider = document.getElementById('uiSlider');
   noUiSlider.create(vSlider, {
      start: 50,
      step: 1,
      direction: 'rtl',
      orientation: 'vertical',  
      range: {
         min: 0,
         max: 100
      },
      format: wNumb({
        decimals: 0
      }),
       // Show a scale with the slider
       pips: {
           mode: 'positions',
           values: a0,10,20,30,40,50,60,70, 80,90,100],
           stepped: true,
       }
   });

//update constant sum answer choice
   var inputNumber = document.getElementById('QR~'+this.questionId+'~1');
   vSlider.noUiSlider.on('update', function (values, handle) {
       inputNumber.value = values handle];
   });
   inputNumber.addEventListener('change', function () {
      vSlider.noUiSlider.set(enull, this.value]);
   });
   inputNumber.setAttribute('readonly',true);

	//blank initial value
   jQuery(inputNumber).val('');

});

Qualtrics.SurveyEngine.addOnReady(function()
{
	/*Place your JavaScript here to run when the page is fully displayed*/

//hide handle until slider interacted
jQuery("#"+this.questionId+" #uiSlider > div.noUi-base > div.noUi-origin > div").attr("id","handle");
var handle = document.getElementById('handle');
var track = document.getElementById('uiSlider');
var clicked ="no";

jQuery(handle).css('visibility', 'hidden');

jQuery(track).on("click , touchstart", function() {
clicked = "yes";
});

jQuery(track).on("click , touchstart", function() {
if(clicked == "yes"){
    jQuery(handle).css('visibility', 'visible');
}
});

});

Qualtrics.SurveyEngine.addOnUnload(function()
{
	/*Place your JavaScript here to run when the page is unloaded*/

});