JSFiddle - React, Tailwind, and code Playground

HTML

<div style="width: 1000px; height: 1000px"></div>

JavaScript

window.addEventListener('mousedown', (event) => {
   console.log(`브라우저 좌표 : ${event.pageX} ,${event.pageY}`);
   console.log(`화면 좌표 : ${event.clientX} ,${event.clientY}`);
});