JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sm-tot" data-ts-speed="500" data-ts-interval="4000" data-ts-newVal="5000" > </div>

JavaScript

$(document).ready(function(){
    var speed = $("div.sm-tot").data("ts-speed");
    var interval = $("div.sm-tot").data("ts-interval");
    $("div.sm-tot").append("speed: " + speed + "<br />");
    $("div.sm-tot").append("interval: " + interval + "<br />");

});