JSFiddle - React, Tailwind, and code Playground

by johan polson

HTML

<div id="map">
</div>

CSS

#map {
    width: 500px;
    height: 500px;
    position: absolute;
    z-index: -1;
    background-color: #f1f1f1;
    background: url("https://wow.zamimg.com/images/wow/maps/enus/zoom/4714.jpg?27980");
}

TypeScript

dragElement(document.getElementById("map"));

function dragElement(elmnt) {
  var pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
  
  elmnt.onmousedown = dragMouseDown;
  
  document.onkeydown = keydown;
	elmnt.onclick = click;
  elmnt.onwheel =  wheel // or document

	function wheel(e) {
		console.log("wheel",e);
  }

	function click(e) {
		console.log("click",e.layerX);
  }

	function keydown(e) {
		console.log("keydown",e);
  }

  function dragMouseDown(e) {
    e = e || window.event;
    e.preventDefault();
    // 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:
    pos1 = pos3 - e.clientX;
    pos2 = pos4 - e.clientY;
    pos3 = e.clientX;
    pos4 = e.clientY;
    // set the element's new position:
    elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
    elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
  }

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