JSFiddle - React, Tailwind, and code Playground

HTML

<div id="elementa"></div>
    <div id="elementb"></div>

CSS

#elementa{position:absolute;top:0;left:0;width:50px;height:50px;z-index: 10;background-color:red;height:200px;width:200px;}
    #elementb{position:absolute;top:0;left:0;width:50px;height:50px;z-index: 20;background-color:black;height:200px;width:200px;}

JavaScript

$( '#elementb').mousedown (function(){
    $(this).mousemove(function(){
    	$( document ).trigger("mousemove");
    });
    $( document ).mousemove(function(e){
        console.log(e.clientX,e.clientY);
    	$( '#elementa').css({"left":e.clientX,"top":e.clientY});
    });
});