installed three and vite

node_modules/three/examples/jsm/offscreen/jank.js

@@ -0,0 +1,45 @@
+let interval = null;
+let result = null;
+
+function initJank() {
+
+	const button = document.getElementById( 'button' );
+	button.addEventListener( 'click', function () {
+
+		if ( interval === null ) {
+
+			interval = setInterval( jank, 1000 / 60 );
+
+			button.textContent = 'STOP JANK';
+
+		} else {
+
+			clearInterval( interval );
+			interval = null;
+
+			button.textContent = 'START JANK';
+			result.textContent = '';
+
+		}
+
+	} );
+
+	result = document.getElementById( 'result' );
+
+}
+
+function jank() {
+
+	let number = 0;
+
+	for ( let i = 0; i < 10000000; i ++ ) {
+
+		number += Math.random();
+
+	}
+
+	result.textContent = number;
+
+}
+
+export default initJank;