Framerate fix

fixedFramerate.js

function loop(framerate,update,draw) {
  //Update and draw are callbacK function
	var requestedInterval = 1000/framerate;
	var timeSinceLastUpdate = 0;
	var lastFrameTimeStamp = 0;
	
	function loopFunction() {
		requestAnimationFrame(loopFunction);
		var now = Date.now();
		var dt = now - lastFrameTimeStamp; //Classic DeltaTime
		
		timeSinceLastUpdate += dt;
		lastFrameTimeStamp = now;
		if (timeSinceLastUpdate>3*requestedInterval) { //In case the browser cannot catch up with the update. It may create a vicouse circle
			timeSinceLastUpdate = 3*requestedInterval
		}
		
		while (timeSinceLastUpdate>requestedInterval) {
			timeSinceLastUpdate-=requestedInterval;
			if (update) {
				update();
			}
		}
		if (draw) {
			draw(dt);
		}
	}
	
	loopFunction();
}