yarn add fullscreen-canvas
or
npm i fullscreen-canvas
import FullscreenCanvas from "fullscreen-canvas";
const fscan = new FullscreenCanvas();
const can = fscan.el;
const ctx = can.getContext("2d");
document.body.appendChild(fscan.el);
fscan.makeAlwaysFullscreen();
function go() {
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(can.width, can.height);
ctx.moveTo(can.width, 0);
ctx.lineTo(0, can.height);
ctx.stroke();
requestAnimationFrame(go);
}
requestAnimationFrame(go);body {
margin: 0;
overflow: hidden;
}