range slider: put comma and a dollar sign before the number

rangeslider.js

let rangeSlider = document.querySelector("#ff_258_rangeslider");
let rangeValue = document.querySelector(".ff_range_value");    
    
rangeSlider.onchange = function(event){
  
    let commaValue = event.target.value.replace(/\B(?=(\d{3})+(?!\d))/g, ",");
    
    rangeValue.innerText = "$ "+commaValue;
}