node_modules/three/examples/js/offscreen/offscreen.js

self.importScripts( '../../../build/three.js' );
self.importScripts( './scene.js' );

self.onmessage = function ( message ) {

	var data = message.data;
	init( data.drawingSurface, data.width, data.height, data.pixelRatio, data.path );

};