JSFiddle - React, Tailwind, and code Playground

by brigand

HTML

<div class="circle">
  <div class="net hide"></div>
</div>

CSS

.circle {
  position: relative;
  background: #449922;
  width: 2em;
  height: 2em;
  border-radius: 50%;
}

.net.hide {
  display: none;
}

.net {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1000000;
  background: rgba(0, 0, 0, 0.2);
}

JavaScript

const circle = document.querySelector('.circle')
const net = circle.querySelector('.net')

let x = null;

circle.onmousedown = (event) => {
	event.preventDefault();
  net.classList.toggle('hide', false)
  x = event.pageX
}

circle.onmouseup = (event) => {
	event.preventDefault();
  net.classList.toggle('hide', true)
  x = null;
}

circle.onmousemove = (event) => {

}