JSFiddle - React, Tailwind, and code Playground

by Nabaraj Saha

HTML

<label for="vol">Volume (between 0 and 50):</label>
  <input type="range" id="vol" name="vol" min="0" max="50" oninput="showVal(this.value)" onchange="showVal(this.value)">
  
<div class="showVal"></div>

<div id="js-slider">
  <div class="slideTrack"></div>
  <span id="sl" class="handle slideLeft"></span>
  <span id="rl" class="handle slideRight"></span>
</div>

CSS

#js-slider {
  width: 100%;
  height: 10px;
  border: 1px solid #c5c5c5;
  border-radius: 5px;
  position: relative;
}
.handle {
  border: 1px solid #c5c5c5;
  background-color: #f6f6f6;
  display: block;

  position: absolute;
  z-index: 2;
  width: 1.2em;
  height: 1.2em;
  cursor: default;
  -ms-touch-action: none;
  touch-action: none;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 3px;
}
.slideLeft{
  left:30%;
    
}
.slideRight{
  left:50%;
}

JavaScript

function showVal(val){
	console.log(val);
  document.querySelectorAll(".showVal")[0].innerHTML = val;
}

dragElement(document.getElementById("js-slider"));

function dragElement(elmnt) {
  var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0, slide;
  /* if (document.getElementById(elmnt.id + "header")) {
    // if present, the header is where you move the DIV from:
    document.getElementById(elmnt.id + "header").onmousedown = dragMouseDown;
  } else {
    // otherwise, move the DIV from anywhere inside the DIV:
    elmnt.onmousedown = dragMouseDown;
  } */
  
  
let handles = elmnt.querySelectorAll(".handle");

for (const handle of handles) {
  handle.onmousedown = dragMouseDown
}

  function dragMouseDown(e) {
    e = e || window.event;
    e.preventDefault();
    console.log(e);
    // get the mouse cursor position at startup:
    pos3 = e.clientX;
    pos4 = e.clientY;
    document.onmouseup = closeDragElement;
    // call a function whenever the cursor moves:
    document.onmousemove = elementDrag;
  }

  function elementDrag(e) {
    e = e || window.event;
    e.preventDefault();
    // calculate the new cursor position:
    console.log(e.clientX);
    if(e.target.classList.contains("handle")){
    slide = e.target;
    }
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    /* e.target.style.top = (e.target.offsetTop - pos2) + "px" */;
    /* slide.style.left = (e.target.offsetLeft - pos1) + "px" */;
    slide.style.left = e.clientX;
  }

  function closeDragElement() {
    // stop moving when mouse button is released:
    document.onmouseup = null;
    document.onmousemove = null;
  }
}